Suzuki 2-Stroke Outboard Marine Engine 115-350HP Parts

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This page is for Suzuki 2-Stroke 115–350HP outboard engines. Use it to find compatible parts and service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Suzuki collection. Scroll to the bottom of this page to start browsing parts for this engine. On the collection page, use the “Filter & Sort” controls to narrow results by horsepower, year range, and part category/section.

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How to Identify Your 115–350HP Model

Nameplate location: Look on the transom clamp bracket or starboard swivel bracket for the model/serial plate (and a secondary sticker under the cowling). Record the full model code and serial.
Model code basics: Suzuki 2‑Stroke models typically start with “DT” (e.g., DT115, DT200). Suffix letters indicate shaft length and options (S≈15", L≈20", X≈25"; T=Power Trim/Tilt; Z=counter‑rotation).
Platform clues: 115–140 HP are commonly inline‑4; 150–225 HP are V6. If your model begins with “DF” (e.g., DF250/DF300/DF350), it’s a 4‑Stroke platform—use our filters in the Suzuki collection to locate the correct parts.
Oil system: Most Suzuki 2‑Stroke models are oil‑injected. Inspect the remote oil tank, lines, and pump. Some regional models may be premix—follow your service manual ratio.

Platform Overview

Inline‑4 (115–140 HP) 2‑Stroke

Feature	Description
Configuration	Inline‑4, loop‑charged, carbureted 2‑stroke with oil injection and CDI ignition.
Common Models	DT115, DT140 (various shaft lengths and trim/tilt options).
Advantages	Light weight, quick throttle response, strong mid‑range torque.
Notes	Ignition, cooling, and some gearcase components share compatibility across DT115/DT140—confirm by model and serial.

V6 (150–225 HP) 2‑Stroke

Feature	Description
Configuration	60° V6 2‑stroke, oil injection; triple carburetors or early EFI depending on year; CDI/ECU ignition.
Common Models	DT150, DT175, DT200, DT225.
Advantages	High power‑to‑weight ratio, robust lower units, strong mid‑ to top‑end.
Notes	Lower‑unit ratios, exhaust housing, and ignition components vary by year—match parts to your exact model code.

If your nameplate shows 250–350 HP with a DF prefix, you’re on the 4‑Stroke DF platform. Use the filters in the Suzuki collection to navigate to 4‑Stroke parts by horsepower and year.

Routine Maintenance & Service Parts

Intervals below are general guidelines for 2‑Stroke Suzuki outboards. Always follow the procedures and schedules in your official service manual.

Item	Interval*	Remarks	Parts Link
Gear oil (lower unit)	Every 100 hrs or annually	Inspect for water (milky oil). Replace seals if contamination is found.	Suzuki Lower Unit Seal Kits
Spark plugs	Inspect 50 hrs; replace ~100 hrs/annual	Use the specified heat range and gap; fouling indicates mixture/oiling issues.	Suzuki Spark Plugs
Fuel filter (in‑line/under‑cowl)	Every 100 hrs or annually	Replace sooner in high‑moisture or dirty‑fuel environments.	Suzuki Fuel Filters
Fuel pump (diaphragm) service	~200 hrs or 2 years	Rebuild/replace if starvation or surging at mid–WOT occurs.	Suzuki Fuel Pumps
Water pump impeller/kit	Annually or ~100 hrs	Shorten interval in sandy/silty water; inspect housing and wear plate.	Suzuki Water Pump Repair Kits
Thermostat	~2 years	Stuck‑open causes cold running and smoke; stuck‑closed risks overheating.	Suzuki Service & Maintenance Kits
Anodes (external & internal)	Inspect 50 hrs; replace when ≥50% depleted	Match alloy to water type (salt/brackish/fresh) for best protection.	Suzuki Anodes
Oil injection system (tank filter, lines, bleed)	100–200 hrs	Inspect hoses for brittleness; bleed air after service; verify pump output.	Suzuki Hoses

*Intervals vary by model, hours, and environment. Follow the official Suzuki service manual for your exact engine.

Frequently Used Parts Categories

Routine Service — Suzuki Service & Maintenance Kits
Cooling System — Suzuki Water Pump Repair Kits
Fuel System — Suzuki Fuel Filters
Ignition / Electrical — Electrical Items
Gearcase & Seals — Suzuki Lower Unit Seal Kits
Corrosion Protection — Suzuki Anodes
Hoses & Lines — Suzuki Hoses

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak telltale / overheat alarm	Inspect intake screens, telltale nozzle, water pump impeller, and thermostat.	Water pump kit, impeller housing/plate, thermostat, intake screen.
Poor acceleration / power loss	Check prop condition/ventilation, fuel filter, primer bulb, plugs; verify throttle opening.	Fuel filter, fuel pump, spark plugs, propeller.
Hard starting / rough idle	Verify choke/enrichment operation, prime bulb firmness, clean idle circuits; check for air leaks.	Spark plugs, fuel filter, primer bulb, carb/idle circuit kit.
Excessive smoke	Confirm correct oil type, check oil injection pump setting and hoses; ensure thermostat isn’t stuck open.	Oil pump/lines, thermostat, spark plugs.
Gearcase noise / metal in oil	Drain and inspect gear oil for metal or water; check seals and prop shaft for fishing line.	Lower unit seal kit, bearings, drain plug gaskets.

FAQs

Are parts interchangeable between different years or platforms?

Many service items are shared within families (e.g., DT115/DT140 or DT150–DT225), but ignition, gearcase, and cooling parts can change by year and model code. Always match parts to the exact model suffix, shaft length, and serial range.

When should the impeller be replaced?

As a preventative measure, replace the impeller annually or every ~100 hours. In sandy or silty water, shorten the interval and inspect the wear plate and housing for grooves.

How often should the gear oil be changed?

Change lower‑unit gear oil at least every 100 hours or annually. If the oil appears milky or contaminated, service the seals before returning to use.

What information helps confirm part compatibility?

Provide the full model code (including suffix), serial number, shaft length (S/L/X), control type (tiller/remote), and note whether the engine is oil‑injected or premix. Photos of the nameplate and the part area also help.

Ready to find parts by horsepower, year, and model? Browse the main Suzuki collection and use Filter & Sort to narrow to your exact 2‑Stroke outboard.

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If you’re unsure about your model, send us a photo of the nameplate and the part you need and we’ll help verify compatibility.