{"title":"Suzuki 4-Stroke 9.9-70HP Outboard Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; max-width:980px; margin:0 auto;\"\u003e\n  \u003cp\u003eThis page is dedicated to Suzuki 4‑Stroke 9.9–70 HP outboard engines. Use it to find compatible parts, routine service guidance, maintenance tips, common replacement items, and troubleshooting help. You can also browse the main Suzuki collection. Scroll to the bottom of this page to start browsing parts for this engine, and remember that on the collection page you can use the Filter \u0026amp; Sort controls 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:#0b6; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Suzuki Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px; max-width:980px; margin:0 auto;\"\u003e\n  \u003ch2\u003eHow to Identify Your 9.9–70 HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the nameplate\/serial plate: typically on the transom bracket (starboard side) or on the swivel bracket below the engine cover.\u003c\/li\u003e\n    \u003cli\u003eRead the full model code and suffix: examples include DF9.9, DF15A\/DF20A, DF25A\/DF30A, DF40\/DF50\/DF60 (and DF40A\/DF50A\/DF60A), DF70\/DF70A. The suffix letters often indicate revision, shaft length, and control\/starting options.\u003c\/li\u003e\n    \u003cli\u003eConfirm stroke and platform: these are 4‑stroke engines. Smaller models (9.9–30 HP) are typically 2–3 cylinder platforms; midrange 40–60 HP are inline‑3 EFI; 70 HP commonly uses an inline‑4 EFI platform.\u003c\/li\u003e\n    \u003cli\u003eMatch serial\/frame number ranges when possible to ensure parts compatibility across earlier and later “A\/B” updates.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px; max-width:980px; margin:0 auto;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n\n  \u003ch3\u003eSmall Block (DF9.9–DF30)\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 #eee;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eCompact 4‑stroke platforms; DF9.9\/15\/20 are typically inline‑2; DF25A\/DF30A are inline‑3 with modern fuel\/ignition management.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eDF9.9B, DF15A, DF20A, DF25A, DF30A.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eLightweight, easy to service, excellent fuel economy, smooth idle for trolling.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003ePay attention to model suffixes for shaft length and manual\/electric start options. Some service parts are shared across displacements; confirm by model code and serial range.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eMidrange (DF40–DF60)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse; margin-top:12px;\"\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 #eee;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInline‑3 EFI 4‑stroke platforms; seen as DF40\/50\/60 and later DF40A\/50A\/60A updates.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eDF40, DF50, DF60; DF40A, DF50A, DF60A.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eStrong mid‑range torque, reliable EFI starting, broad parts availability.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCooling components (thermostats\/impellers) and filters are routine service items. Earlier DF40\/50\/60 and later “A” revisions may use different calibrations and some distinct parts; verify by model and serial.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eHigh‑Mid (DF70)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse; margin-top:12px;\"\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 #eee;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInline‑4 EFI 4‑stroke platform across DF70 and DF70A generations.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eDF70, DF70A.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eHigher charging output and strong overall performance while remaining serviceable on the transom.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eThermostat temperature ratings and water pump kits vary by generation; confirm via model code and serial\/frame number.\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=\"padding:16px; max-width:980px; margin:0 auto;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for Suzuki 4‑stroke outboards in the 9.9–70 HP range. Always consult the official service manual for the exact procedures and intervals for your model and usage.\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:2px solid #ddd; padding:8px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:2px solid #ddd; padding:8px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:2px solid #ddd; padding:8px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:2px 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 #eee;\"\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eChange sooner for heavy use or harsh environments; warm engine before draining.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\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 #eee;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInspect for water intrusion (milky oil). Replace seals if contamination is found.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\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; border-bottom:1px solid #eee;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInspect every 100 hours; replace 200–300 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eCheck gap and coloration; replace if fouled or worn.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInline fuel filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eReplace more often if using ethanol fuel or in high‑debris environments.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\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 #eee;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003e2–3 seasons or ~200 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eEssential for cooling. Shorten interval for sandy\/silty water use.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\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 #eee;\"\u003eAnodes (internal \u0026amp; external)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInspect often; replace when ~50% consumed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eUse zinc (salt), aluminum (brackish\/salt), or magnesium (fresh) as appropriate.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\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 #eee;\"\u003eThermostat\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInspect every 2 years; replace if sticking\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eOpening temperature varies by model\/platform; verify by model code.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\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;\"\u003ePropeller \u0026amp; hardware\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCheck every trip\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect for damage and hub slip; verify correct pitch for load and RPM.\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=\"padding:16px; max-width:980px; margin:0 auto;\"\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\/ignition-switch\"\u003eIgnition Switch\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGearcase \u0026amp; Seals: \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\u003ePropulsion: \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=\"padding:16px; max-width:980px; margin:0 auto;\"\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:2px solid #ddd; padding:8px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:2px solid #ddd; padding:8px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:2px 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 #eee;\"\u003eWeak telltale stream or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eInspect water inlets for debris; verify strong primer bulb; check telltale hose; confirm recent impeller service.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eWater pump kit\/impeller, thermostat, intake screen\/flush plug.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eCheck prop for damage or hub slip; verify clean fuel and fresh filters; confirm WOT RPM with correct prop pitch.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003ePropeller and hardware, fuel filter, fuel pump, spark plugs.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eTest battery and connections; inspect primer bulb and fuel lines; look for stale fuel; verify idle air control (EFI) or carb settings (where applicable).\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eSpark plugs, fuel filter, injector\/carb components, hoses\/clamps.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eDrain gear oil and inspect; check for water intrusion; perform prop‑shaft seal and bearing checks.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #eee;\"\u003eLower unit seal kit, bearings, prop‑shaft seals, gear oil.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eExcessive smoke on startup (4‑stroke)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eVerify oil level is not overfilled; check for engine tilt storage issues and stuck thermostat leading to cool running.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eEngine oil\/filter, thermostat, PCV\/breather service.\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=\"padding:16px; max-width:980px; margin:0 auto;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between different years or “A\/B” platform updates?\u003c\/summary\u003e\n    \u003cp\u003eSome service items carry over, but many components (cooling, ignition, sensors, cowl hardware) differ between earlier DF models and later “A” updates. Always confirm by the full model code and serial\/frame number before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the water pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eAs a general rule, every 2–3 seasons or about 200 hours—sooner for sandy, shallow, or silty operation. Replace the full kit if the housing shows wear.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change lower unit gear oil?\u003c\/summary\u003e\n    \u003cp\u003eInspect at 100 hours or annually, and any time the gearcase has impact with bottom or debris. Milky oil indicates water intrusion and the seals should be serviced.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information helps confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003ePlease provide the full model code, serial\/frame number, shaft length (S\/L\/X), control type (tiller\/remote), and approximate model year. Clear photos of the nameplate and the part area also help.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px; max-width:980px; margin:0 auto;\"\u003e\n  \u003cp\u003eReady to find parts for your Suzuki 4‑Stroke 9.9–70 HP outboard? Browse the main collection by horsepower, year, and model to zero in on compatible components.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/suzuki-outboard-parts\" style=\"display:inline-block; padding:10px 14px; background:#0b6; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop Suzuki Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px; color:#555;\"\u003eIf you’re unsure about your model, send us a clear 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-60-c-140-f-fits-suzuki-marine-9-9-70hp-replaces-17670-94402-17670-94400-17670-94404","title":"140°F\/60°C Outboard Thermostat – Suzuki DF\/DT and Johnson\/Evinrude 10–70 HP","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\u003e140°F\/60°C marine outboard thermostat\u003c\/strong\u003e is a replacement temperature-control component for selected Suzuki DF and DT outboard engines and Johnson\/Evinrude outboards. It helps regulate cooling-system temperature by opening at approximately 60°C (140°F), supporting the engine's normal operating temperature.\u003c\/p\u003e\n\u003cp\u003eThe company catalog lists this thermostat for Suzuki outboards from 25 to 70 HP and for Johnson\/Evinrude applications from 10 to 70 HP. Because fitment can vary by model, year, and serial number, confirm the original thermostat number and the complete engine model before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e140°F\/60°C rating:\u003c\/strong\u003e Designed for applications requiring a 60°C thermostat.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAftermarket replacement:\u003c\/strong\u003e Replaces the listed OEM and aftermarket reference numbers when the application matches.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCooling-system function:\u003c\/strong\u003e Helps maintain the intended operating temperature of a compatible marine outboard.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle thermostat:\u003c\/strong\u003e This listing is for one thermostat, not a multi-piece kit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse the following numbers as reference points and verify the number against your engine or service documentation before purchase.\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\u003eJohnson\/Evinrude\/OMC\u003c\/td\u003e\n\u003ctd\u003e5031758\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e0769184\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003e17670-94400 \/ 17670-94401 \/ 17670-94402\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003e17670-94403 \/ 17670-94404\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eAftermarket reference\u003c\/td\u003e\n\u003ctd\u003e18-S944\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eThe company catalog identifies the following Suzuki model families and power ranges. Model suffixes, production years, and serial-number limits can affect fitment, so use the part-number cross-reference as well as the model information.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel Family\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke or Application\u003c\/th\u003e\n\u003cth\u003eDocumented Year Information\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDF9.9, DF15\u003c\/td\u003e\n\u003ctd\u003e9.9–15\u003c\/td\u003e\n\u003ctd\u003eFour-stroke applications\u003c\/td\u003e\n\u003ctd\u003eDF applications listed from 1996–2011 in the company notes\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDF25, DF30\u003c\/td\u003e\n\u003ctd\u003e25–30\u003c\/td\u003e\n\u003ctd\u003eFour-stroke applications\u003c\/td\u003e\n\u003ctd\u003eDF25\/DF30 applications listed for 2000–2006\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDF40, DF50\u003c\/td\u003e\n\u003ctd\u003e40–50\u003c\/td\u003e\n\u003ctd\u003eFour-stroke applications\u003c\/td\u003e\n\u003ctd\u003eDF40\/DF50 applications listed for 1999–2010\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDF60, DF70\u003c\/td\u003e\n\u003ctd\u003e60–70\u003c\/td\u003e\n\u003ctd\u003eFour-stroke applications\u003c\/td\u003e\n\u003ctd\u003eDF60\/DF70 applications listed for 1998–2009\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDT9.9, DT15, DT20\u003c\/td\u003e\n\u003ctd\u003e9.9–20\u003c\/td\u003e\n\u003ctd\u003eTwo-stroke applications\u003c\/td\u003e\n\u003ctd\u003eApplications listed for 1986–2004\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDT25, DT30\u003c\/td\u003e\n\u003ctd\u003e25–30\u003c\/td\u003e\n\u003ctd\u003eTwo-stroke applications\u003c\/td\u003e\n\u003ctd\u003eApplications listed for 1986–2002\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSuzuki\u003c\/td\u003e\n\u003ctd\u003eDT40\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003eTwo-stroke applications\u003c\/td\u003e\n\u003ctd\u003eApplications listed for 1986–2004\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003eSelected outboard models\u003c\/td\u003e\n\u003ctd\u003e10–70\u003c\/td\u003e\n\u003ctd\u003eApplication-specific; catalog evidence includes two-stroke models\u003c\/td\u003e\n\u003ctd\u003eVerify exact 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 engine thermostat\u003c\/dd\u003e\n  \u003cdt\u003eTemperature Rating\u003c\/dt\u003e\n  \u003cdd\u003e140°F (60°C)\u003c\/dd\u003e\n  \u003cdt\u003eOpening Temperature\u003c\/dt\u003e\n  \u003cdd\u003eApproximately 140°F (60°C)\u003c\/dd\u003e\n  \u003cdt\u003eApplication Range\u003c\/dt\u003e\n  \u003cdd\u003eSelected Suzuki, Johnson, and Evinrude outboard applications from 10 to 70 HP\u003c\/dd\u003e\n  \u003cdt\u003eProduct Construction\u003c\/dt\u003e\n  \u003cdd\u003eAftermarket replacement component\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x 140°F\/60°C thermostat\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA housing gasket is not listed as included. Reuse or replacement of the gasket should be determined during installation, and a new gasket is recommended when required by the engine manufacturer.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eAllow the engine to cool completely before beginning work.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the battery or follow the engine manufacturer's safety procedure.\u003c\/li\u003e\n  \u003cli\u003eLocate the thermostat housing and place a suitable drain pan beneath the work area.\u003c\/li\u003e\n  \u003cli\u003eRemove the housing cover carefully and note the original thermostat orientation.\u003c\/li\u003e\n  \u003cli\u003eRemove the old thermostat and clean the mating surfaces without damaging the housing.\u003c\/li\u003e\n  \u003cli\u003eInstall the new thermostat in the same orientation as the original part.\u003c\/li\u003e\n  \u003cli\u003eInstall a suitable new housing gasket if required, then refit the cover and tighten the fasteners to the manufacturer's specification.\u003c\/li\u003e\n  \u003cli\u003eRestore the cooling system as required, start the engine, and check for leaks and proper water flow.\u003c\/li\u003e\n  \u003cli\u003eConfirm that the engine reaches its normal operating temperature during a controlled test.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat does the 140°F\/60°C rating mean?\u003c\/summary\u003e\u003cp\u003eIt identifies the approximate temperature at which the thermostat begins to open and regulate cooling-system flow for a compatible engine.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this an OEM thermostat?\u003c\/summary\u003e\u003cp\u003eNo. This is an aftermarket replacement thermostat intended for applications that cross-reference to the listed OEM numbers.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes the package include a gasket?\u003c\/summary\u003e\u003cp\u003eNo gasket is listed as included. Check the condition of the existing gasket and the engine manufacturer's service instructions before installation.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill it fit every Suzuki, Johnson, or Evinrude engine from 10 to 70 HP?\u003c\/summary\u003e\u003cp\u003eNo. The stated horsepower range is an application guide, not a universal fitment claim. Verify the exact model, year, serial number, stroke, and original thermostat part number before ordering.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhy should I verify the original part number?\u003c\/summary\u003e\u003cp\u003eThermostat fitment can change between model versions and serial-number ranges even when horsepower is the same. Matching the original number is the safest way to confirm compatibility.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are common signs of a thermostat problem?\u003c\/summary\u003e\u003cp\u003ePossible symptoms include overheating, running below normal temperature, unstable temperature behavior, or reduced cooling-system performance. Inspect the complete cooling system before replacing the thermostat.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the original thermostat number and complete engine identification before purchase.\u003c\/li\u003e\n  \u003cli\u003eKeep model, year, serial number, horsepower, and stroke information together when checking fitment.\u003c\/li\u003e\n  \u003cli\u003eNever work on a hot engine or open a pressurized cooling-system component while hot.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement component and is not manufactured by Suzuki, Johnson, Evinrude, or OMC.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when the required service procedure or torque specifications are unfamiliar.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine Replacement Parts\u003c\/strong\u003e — We provide aftermarket components for maintenance and repair of marine engines and systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Cataloging\u003c\/strong\u003e — Product references are presented to help customers compare OEM numbers and engine applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupport for Fitment Checks\u003c\/strong\u003e — When model and part-number information is available, confirm those details before ordering to reduce compatibility errors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723973398843,"sku":"21TH032","price":26.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/21TH032_1_e06ef7f7-6f4d-4aa0-97be-842b5752b220.jpg?v=1763038898"}],"url":"https:\/\/seasierra.com\/collections\/suzuki-4-stroke-9-9-70hp-outboard-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}