{"title":"Suzuki 2-Stroke 9.9-65HP Outboard Engine Parts","description":"\u003csection id=\"hero\" style=\"max-width: 1000px; margin: 0 auto; padding: 16px 12px;\"\u003e\n  \u003cp\u003eThis page is dedicated to Suzuki 2-Stroke 9.9–65HP outboard engines. Use it to find compatible replacement parts and practical service information. Below you’ll find maintenance tips, common replacement categories, and troubleshooting guidance. You can also browse the main Suzuki collection for a wider selection. Scroll to the bottom of the page to start browsing parts for this engine, and remember you can use the “Filter \u0026amp; Sort” controls on the collection page to narrow results by horsepower, year range, and part category.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-outboard-parts\" style=\"display:inline-block;padding:10px 14px;background:#0a6d2d;color:#fff;border-radius:4px;text-decoration:none;\"\u003eBrowse All Suzuki Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"max-width: 1000px; margin: 0 auto; padding: 16px 12px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 9.9–65HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the ID\/serial plate on the starboard side of the transom or swivel bracket. Record the full model designation and serial number.\u003c\/li\u003e\n    \u003cli\u003eModel codes: most 2‑stroke Suzuki outboards use DT prefixes (e.g., DT 9.9\/15\/25\/30\/40\/50\/55\/65). Suffix letters indicate shaft length (S\/L\/X), starting method (E for electric), and control type (R for remote), among others.\u003c\/li\u003e\n    \u003cli\u003ePlatform clues: portable 9.9–30HP models are compact twins\/inline‑3; 40–65HP are larger inline‑3 midrange units. If your cowling says DF, that’s a 4‑stroke and different from this 2‑stroke page.\u003c\/li\u003e\n    \u003cli\u003eVerify shaft length by measuring transom height: Short (S ~15\"), Long (L ~20\"), or X‑Long (X ~25\"). Shaft length affects driveshaft, water pump, and prop selections.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"max-width: 1000px; margin: 0 auto; padding: 16px 12px;\"\u003e\n  \u003ch2\u003eEngine Overview by Platform\u003c\/h2\u003e\n  \u003ch3\u003ePortable DT 9.9–30 2‑Stroke\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eLightweight carbureted 2‑strokes; 9.9\/15 are typically inline‑2, 25\/30 commonly inline‑3.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eDT 9.9, DT 15, DT 25, DT 30 (various shaft lengths and control options).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eSimple, light, strong holeshot; easy dockside service; good parts availability.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eWater pump kits, props, and ignition parts vary by serial breaks and shaft length. Always confirm model suffix and serial number.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eMidrange DT 40–65 2‑Stroke\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eRobust inline‑3 carbureted 2‑strokes (DT 40\/50\/55\/65) with larger gearcases and cooling capacity.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eDT 40, DT 50, DT 55, DT 65 series with S\/L\/X shaft options and remote\/tiller variants.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eStrong midrange torque, simple carb service, straightforward ignition diagnostics.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eProp hub, gearcase seals, and water pump kits are model\/serial specific. Verify serial range before ordering.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"service-kits\" style=\"max-width: 1000px; margin: 0 auto; padding: 16px 12px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for Suzuki 2‑stroke outboards. Always follow the procedures and schedules in your official service manual.\u003c\/p\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eCheck for water intrusion (milky oil). Replace gaskets on drain\/fill screws.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-service-maintenance-kits\"\u003eSuzuki Service \u0026amp; Maintenance Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eUse correct heat range and gap; replace if fouled or worn.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-spark-plug\"\u003eSuzuki Spark Plugs\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eInline\/fuel filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003e100 hours or seasonally\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eReplace to prevent lean conditions and hard starting.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-fuel-filters\"\u003eSuzuki Fuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eWater pump impeller\/kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eEvery 2–3 seasons or ~200 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eCritical for cooling; sooner in sandy\/silty water.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-water-pump-repair-kits\"\u003eSuzuki Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eThermostat (inspect\/replace)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eEvery 2 years or as needed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eSticking thermostats cause cold running or overheat.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-outboard-parts\"\u003eSuzuki Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eAnodes (sacrificial)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eInspect every 50 hours; replace when 50% depleted\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eMatch material to water type (salt\/brackish\/fresh).\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-anodes\"\u003eSuzuki Anodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eCarburetor clean\/rebuild\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003e2–4 years or if performance degrades\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eRestore idle\/transition circuits; replace gaskets and needles.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/carburetor\"\u003eCarburetor Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eOil injection system check (if equipped)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eAnnually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eInspect pump cable setting, bleed lines, verify delivery. For premix models, use correct ratio.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-hoses\"\u003eSuzuki Hoses\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eLower unit seals (pressure\/vac test)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eAs needed if water found in oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eReplace prop shaft\/driveshaft seals, shift shaft seal as required.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-lower-unit-seal-kits\"\u003eSuzuki Lower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003ePropeller (inspect \u0026amp; service)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eEach outing; remove\/grease splines every season\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eRepair\/replace damaged blades; confirm correct pitch and hub.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-propellers\"\u003eSuzuki Propellers\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"max-width: 1000px; margin: 0 auto; padding: 16px 12px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service: \u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-service-maintenance-kits\"\u003eSuzuki Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System: \u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-water-pump-repair-kits\"\u003eSuzuki Water Pump Repair Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System: \u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-fuel-filters\"\u003eSuzuki Fuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical: \u003ca href=\"https:\/\/seasierra.com\/collections\/electrical-items\"\u003eElectrical Items\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eSeals \u0026amp; Gaskets: \u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-lower-unit-seal-kits\"\u003eSuzuki Lower Unit Seal Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropellers: \u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-propellers\"\u003eSuzuki Propellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection: \u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-anodes\"\u003eSuzuki Anodes\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"max-width: 1000px; margin: 0 auto; padding: 16px 12px;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:8px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eWeak tell‑tale or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eInspect intake screens, water pump impeller, and thermostat; verify hose routing.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eWater pump kit, thermostat, gaskets, intake screen, hoses.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eCheck spark plugs, fuel quality, and fuel filter; verify carb synchronization and prop pitch.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eSpark plugs, fuel filter, carburetor kit, propeller.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eConfirm choke\/enrichment operation, check for air leaks, clean idle circuits, verify ignition health.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eCarb kit, fuel hoses, spark plugs, ignition components.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eExcessive smoke (2‑stroke)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eNormal when cold; if continuous, confirm premix ratio or oil pump calibration; check stuck choke and thermostat.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;border-bottom:1px solid #f0f0f0;\"\u003eOil hoses, fuel pump diaphragm, thermostat, spark plugs.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eVerify oil level and condition; perform pressure\/vac test for leaking seals; inspect prop hub for fishing line.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eLower unit seal kit, bearings, gear oil, prop hub hardware.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\" style=\"max-width: 1000px; margin: 0 auto; padding: 16px 12px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between different years or DT platforms?\u003c\/summary\u003e\n    \u003cp\u003eMany service items (plugs, some anodes, props) overlap within the DT families, but water pump kits, gaskets, ignition, and gearcase seals often change at serial breaks. Always confirm your exact model code, suffix (S\/L\/X, E, R), and serial number before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the impeller?\u003c\/summary\u003e\n    \u003cp\u003eAs a rule of thumb, replace the impeller every 2–3 seasons or ~200 hours—sooner if you run in sand, silt, or weed‑heavy waters, or if the tell‑tale weakens or temperatures run hot.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change the gear oil?\u003c\/summary\u003e\n    \u003cp\u003eChange lower unit gear oil every 100 hours or annually, and any time the gearcase is submerged or you find signs of water intrusion (milky oil).\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003ePlease provide the full model designation (e.g., DT 40), serial number, shaft length (S\/L\/X), control type (tiller vs remote), and whether it has electric start. Photos of the nameplate and the part you’re replacing are very helpful.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"max-width: 1000px; margin: 0 auto; padding: 16px 12px;\"\u003e\n  \u003cp\u003eReady to find parts for your Suzuki 2‑Stroke 9.9–65HP outboard? Browse the main Suzuki collection and use Filter \u0026amp; Sort to refine by horsepower, model, and category.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-outboard-parts\" style=\"display:inline-block;padding:10px 14px;background:#0a6d2d;color:#fff;border-radius:4px;text-decoration:none;\"\u003eShop Suzuki Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px;color:#333;\"\u003eIf you’re unsure about your model, send us a photo of the nameplate and the part you need and we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"thermostat-50-c-122-f-fits-suzuki-df40-70-dt9-9-65-pu55-replaces-17670-93961-17670-93962","title":"50°C (122°F) Outboard Thermostat – Fits Suzuki DF40\/DF50\/DF60\/DF70 and DT9.9–DT65; Replaces 17670-93962 and 5030742","description":"\u003csection\u003e\n  \u003cstyle\u003e\n    .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n    table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n    table.ss-table th, table.ss-table td { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n    table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n    @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n  \u003c\/style\u003e\n\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis aftermarket \u003cstrong\u003e50°C (122°F) outboard thermostat\u003c\/strong\u003e is a single replacement thermostat for selected Suzuki outboard engines and compatible OMC, Johnson, and Evinrude applications. It is intended to regulate cooling-system operation at the specified 50°C (122°F) opening temperature.\u003c\/p\u003e\n  \u003cp\u003eThe supplier lists this thermostat as a replacement or cross-reference for Suzuki part numbers \u003cstrong\u003e17670-93960, 17670-93961, 17670-93962, 17670-93963, 17670-93964\u003c\/strong\u003e and for OMC, Johnson, or Evinrude numbers \u003cstrong\u003e5030742, 5031175, and 0769469\u003c\/strong\u003e. Aftermarket reference \u003cstrong\u003e18-S939\u003c\/strong\u003e is also listed. Always compare the original thermostat and confirm the complete engine model, year or model code, and stroke before ordering.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e50°C (122°F) opening temperature.\u003c\/li\u003e\n    \u003cli\u003eReplacement thermostat for selected Suzuki, OMC, Johnson, and Evinrude outboards.\u003c\/li\u003e\n    \u003cli\u003eSold as one thermostat; gasket or O-ring is not included unless specifically stated by the seller.\u003c\/li\u003e\n    \u003cli\u003eAftermarket replacement, not an OEM-branded component.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eThese are supplier-listed replacement and cross-reference numbers. A part-number match should be confirmed against the engine model and application before installation.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand or Reference\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003e17670-93960\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003e17670-93961\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003e17670-93962\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003e17670-93963\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003e17670-93964\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC \/ Johnson \/ Evinrude\u003c\/td\u003e\n\u003ctd\u003e5030742\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC \/ Johnson \/ Evinrude\u003c\/td\u003e\n\u003ctd\u003e5031175\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC \/ Johnson \/ Evinrude\u003c\/td\u003e\n\u003ctd\u003e0769469\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eAftermarket reference\u003c\/td\u003e\n\u003ctd\u003e18-S939\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eEngine Compatibility\u003c\/h2\u003e\n  \u003cp\u003eThe company fitment information lists selected Suzuki DF and DT applications from 25 to 70 HP, plus OMC, Johnson, and Evinrude J\/BJ applications from 70 to 140 HP. Keep the model, year or model code, horsepower, and stroke together when checking compatibility.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Suzuki Engine Compatibility\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel or Application\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYear or Model Code\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDF40\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eConfirm exact year and model code\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDF50X-K10\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999–2010 as listed\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDF60\u003c\/td\u003e\n\u003ctd\u003e60\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eConfirm exact year and model code\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDF70W-K9\u003c\/td\u003e\n\u003ctd\u003e70\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998–2009 as listed\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDT9.9K \/ DT9.9K\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eG–Y and 1986–2000 as listed\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDT15K \/ DT15K1-K4\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eG–Y and 2001–2004 as listed\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDT20, DT25, DT30G-Y\u003c\/td\u003e\n\u003ctd\u003e20–30\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1986–2000 as listed\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDT25, DT30K1-K2\u003c\/td\u003e\n\u003ctd\u003e25–30\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2001–2002 as listed\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDT40C-W G-X\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1986–1999 as listed\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDT40W-K1-K4\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2001–2004 as listed\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDT55, DT65J-X\u003c\/td\u003e\n\u003ctd\u003e55–65\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1988–1999 as listed\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"OMC Johnson Evinrude Engine Compatibility\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eFitment Note\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC \/ Johnson \/ Evinrude\u003c\/td\u003e\n\u003ctd\u003eJ\/BJ outboard applications\u003c\/td\u003e\n\u003ctd\u003e70–140\u003c\/td\u003e\n\u003ctd\u003eConfirm exact stroke\u003c\/td\u003e\n\u003ctd\u003eSupplier-listed application; verify model, year, and serial number\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n    \u003cdd\u003eMarine outboard thermostat\u003c\/dd\u003e\n    \u003cdt\u003eOpening Temperature\u003c\/dt\u003e\n    \u003cdd\u003e50°C (122°F)\u003c\/dd\u003e\n    \u003cdt\u003eApplication Range\u003c\/dt\u003e\n    \u003cdd\u003eSelected Suzuki 25–70 HP applications and selected OMC, Johnson, and Evinrude 70–140 HP applications\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n    \u003cdd\u003eReplacement installation in the original thermostat housing\u003c\/dd\u003e\n    \u003cdt\u003eProduct Construction\u003c\/dt\u003e\n    \u003cdd\u003eAftermarket replacement; material specification is not provided\u003c\/dd\u003e\n    \u003cdt\u003eGasket or O-Ring\u003c\/dt\u003e\n    \u003cdd\u003eNot included unless specifically stated by the seller\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\n  \u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e 50°C (122°F) outboard thermostat\u003c\/li\u003e\n    \u003cli\u003eGasket or O-ring not included\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eTurn the engine off and allow it to cool completely before beginning service.\u003c\/li\u003e\n    \u003cli\u003eFollow the engine manufacturer's service procedure for accessing the thermostat housing.\u003c\/li\u003e\n    \u003cli\u003eRemove the housing cover and note the original thermostat orientation.\u003c\/li\u003e\n    \u003cli\u003eRemove the old thermostat and inspect the housing, sealing surfaces, and related components for corrosion or damage.\u003c\/li\u003e\n    \u003cli\u003eClean the mating surfaces without damaging the housing.\u003c\/li\u003e\n    \u003cli\u003eInstall the replacement thermostat in the same orientation as the original part.\u003c\/li\u003e\n    \u003cli\u003eInstall a new gasket or O-ring if required by the engine service procedure; this product does not include one.\u003c\/li\u003e\n    \u003cli\u003eReinstall the housing cover and tighten the fasteners to the manufacturer's specified torque.\u003c\/li\u003e\n    \u003cli\u003eRun the engine according to the service manual and check for leaks and proper cooling-system operation.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat temperature is this thermostat rated for?\u003c\/summary\u003e\n    \u003cp\u003eThis thermostat is listed for a 50°C (122°F) opening temperature.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this thermostat an OEM part?\u003c\/summary\u003e\n    \u003cp\u003eNo. This listing is for an aftermarket replacement thermostat. The OEM and reference numbers are provided only to help identify compatible applications.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes the thermostat include a gasket or O-ring?\u003c\/summary\u003e\n    \u003cp\u003eNo. The package contains one thermostat only. Replace the gasket or O-ring separately when required by the engine manufacturer's service procedure.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I confirm fitment?\u003c\/summary\u003e\n    \u003cp\u003eMatch the complete engine brand, model, horsepower, stroke, year or model code, and serial-number range where applicable. Also compare the original thermostat and its listed part number before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are common symptoms of a faulty thermostat?\u003c\/summary\u003e\n    \u003cp\u003ePossible symptoms include overheating, slow warm-up, unstable operating temperature, or improper cooling-system performance. Diagnose the complete cooling system before replacing the thermostat.\u003c\/p\u003e\n  \u003c\/details\u003e\n\n  \u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNever service a hot engine or pressurized cooling system.\u003c\/li\u003e\n    \u003cli\u003eVerify the exact engine model, year or model code, horsepower, stroke, and serial number before purchase.\u003c\/li\u003e\n    \u003cli\u003eDo not rely on a part number alone when multiple engine versions use different thermostats.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM-branded component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended when the correct service procedure or torque specification is not available.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cp\u003eSea Sierra supplies aftermarket marine replacement parts for service and repair applications. Please contact support if you need help comparing the listed reference number with your original part.\u003c\/p\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723975725371,"sku":"21TH031","price":26.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/21TH031_1_5ff282f2-10c3-44fd-b9fa-8542a573c989.jpg?v=1763039005"}],"url":"https:\/\/seasierra.com\/collections\/suzuki-2-stroke-9-9-65hp-outboard-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}