Yamaha 7.5HP 2-Stroke Outboard Engine Parts

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This page supports Yamaha 2‑Stroke 7.5HP outboard engines and helps you find compatible parts and service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Yamaha outboard collection for a wider selection. 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 7.5HP Model

Nameplate location: Look for the Yamaha model/serial tag on the top outside edge of the clamp bracket or on the swivel bracket.
Reading the code: Model codes often include shaft length (S = 15" short, L = 20" long), start type (M = manual, E = electric), and control type (tiller vs. remote). A year/series suffix may appear at the end.
2‑Stroke specifics: Most 7.5HP Yamaha two‑strokes are simple carbureted portables. Two visible spark plug leads typically indicate a twin‑cylinder; verify your exact configuration on the model plate.
Other clues: Cowling decals, presence of a charging/rectifier lead (for electric‑start models), and prop shaft length can also help confirm the exact variant.

Platform Overview

Yamaha 7.5HP 2‑Stroke Portable

Feature	Description
Configuration	Carbureted 2‑stroke portable, typically twin‑cylinder with CDI ignition; manual (rope) start or optional electric start.
Common Models	7.5HP 2‑stroke variants in short (S) or long (L) shaft, tiller steer or remote control. Exact code and suffix determine parts compatibility.
Advantages	Lightweight, simple to service, good low‑speed thrust for small boats and dinghies.
Notes	Use NMMA TC‑W3 outboard oil; many service items (impellers, anodes, some ignition and fuel parts) may overlap with nearby Yamaha small‑hp families—confirm by model/serial tag before ordering.

Routine Maintenance & Service Parts

Intervals below are general guidelines for typical recreational use. Always follow the procedures and specifications in your official Yamaha service manual.

Item	Interval*	Remarks	Parts Link
Premix fuel/oil (2‑Stroke)	Every fill	Use NMMA TC‑W3 outboard oil; 50:1 is typical unless otherwise stated on your cowl/label.	Yamaha Outboard Parts
Gear oil (lower unit)	100 hours or annually	Replace drain/fill plug gaskets; inspect for water intrusion (milky oil). Pressure test if contamination is found.	Yamaha Lower Unit Seal Kits
Spark plugs	Inspect 50 hours; replace 100 hours or annually	Check heat range and gap per manual; replace if fouled or worn.	Spark Plugs
Fuel filter / in‑line strainer	100 hours or annually	Replace sooner if debris or water is present; use fresh fuel.	Fuel Filters
Water pump impeller/kit	200 hours or every 2–3 seasons	Service more often if run in sandy, silty, or weedy water, or if tell‑tale is weak.	Yamaha Water Pump Repair Kits
Anodes (internal & external)	Inspect every 50 hours; replace when 50% consumed	Use the correct material for your water (aluminum/zinc for salt, magnesium for fresh where applicable).	Yamaha Anodes
Thermostat	Every 2 years or if running too cool/hot	Replace if corroded or stuck; verify operating temperature.	Yamaha Outboard Parts
Propeller & hardware	Inspect each trip	Check for dings, bent blades, spun hub, and a secure cotter pin. Match pitch to load.	Yamaha Propellers

Frequently Used Parts Categories

Routine Service — Yamaha Service & Maintenance Kits
Cooling System — Yamaha Water Pump Repair Kits
Ignition / Starting — Yamaha Starters
Fuel System — Fuel Filters
Propulsion — Yamaha Propellers
Corrosion Protection — Yamaha Anodes
Gearcase Seals — Yamaha Lower Unit Seal Kits

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale or overheat alarm	Clear the tell‑tale outlet, inspect intake screen for debris, verify water pump impeller condition, and test thermostat.	Water pump kit, thermostat, intake screen
Hard starting / rough idle	Prime the bulb, verify choke/enrichment operation, inspect/replace spark plugs, drain stale fuel, check for air leaks in fuel line.	Spark plugs, fuel filter, carburetor gasket/kit, primer bulb
Poor acceleration / power loss	Inspect prop for damage or wrong pitch, check for weeds/cavitation, clean carburetor jets, verify fuel quality and venting.	Propeller, carburetor jets/needle, fuel pump diaphragm, reed valves
Excessive smoke (2‑Stroke)	Confirm correct fuel/oil ratio, use TC‑W3 oil, check thermostat (cold‑running increases smoke).	TC‑W3 oil, thermostat, spark plugs
Gearcase noise / metal in gear oil	Check oil level and condition, inspect prop shaft for fishing line, pressure test for seal leaks.	Lower unit seal kit, bearings, drain/fill plug gaskets

FAQs

Are parts interchangeable between different years or nearby horsepower models?

Some items (impellers, anodes, certain ignition and fuel parts) may cross over among Yamaha small‑hp two‑strokes. Always confirm with your exact model code, shaft length, and start/control type before ordering.

When should I replace the water pump impeller?

As a rule of thumb, service the impeller every 2–3 seasons or ~200 hours—sooner if you see a weak tell‑tale, overheat alarms, or if the engine is used in sandy/silty water.

How often should the gear oil be changed?

Change lower unit gear oil every 100 hours or annually. If you find milky oil or metal debris, investigate seals and internal gears before further use.

What information do you need to verify part compatibility?

Please provide the Yamaha model code and serial, shaft length (S/L), start type (manual/electric), control type (tiller/remote), and any known year or suffix. Photos of the nameplate and the part needing replacement are very helpful.

Ready to find parts? Browse the main Yamaha outboard collection and use horsepower, year, and model filters to narrow your search.

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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.