Yamaha 4-Stroke 15HP Outboard Marine Engine Parts

(79 products)

This page is for Yamaha 4-Stroke 15HP outboard engines. Use it to find compatible parts and service information, including maintenance tips, common replacement items, and troubleshooting guidance. You can also browse the main Yamaha collection, and at the bottom of this page you’ll find a direct link 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 15HP Model

Locate the nameplate/serial sticker on the port-side transom bracket. It will show the model code (e.g., F15…) and a production number.
Read the code: “F” indicates 4-stroke; “15” is horsepower. Suffix letters often indicate start type (M = manual, E = electric), shaft length (S = 15" short, L = 20" long), and control/tiller (H commonly denotes tiller handle).
Confirm features visually: 4-stroke models have an external oil filter and oil fill/dipstick; most 15HP variants are twin-cylinder carbureted engines.
When ordering parts, match the full model code and serial to ensure correct items for bracket, cowling, ignition, and gearcase components.

Platform Overview

Yamaha 15HP 4‑Stroke Inline‑2 (Carbureted)

Feature	Description
Configuration	Inline‑2, carbureted 4‑stroke outboard, manual or electric start, short (S) or long (L) shaft options
Common Models	Examples include F15C/F15D variants such as F15CMH, F15CMSH, and F15ELH (verify your exact suffix)
Advantages	Lightweight, quiet idle, strong low‑end torque, and excellent fuel economy for small craft
Notes	Many wear items are shared across F15C/D families, but confirm model code for starters, brackets, cowling, and gearcase parts; follow valve‑clearance and carb sync settings per the service manual

Routine Maintenance & Service Parts

Intervals below are general guidelines for typical recreational use. Always follow the official Yamaha service manual for your exact model and operating conditions.

Item	Interval*	Remarks	Parts Link
Engine oil + filter	100 hours or annually	Warm engine before draining; replace crush washer and filter; check for leaks	Yamaha Service & Maintenance Kits
Gear oil (lower unit)	100 hours or annually	Inspect for metal or water intrusion; replace seals if milky oil is found	Yamaha Lower Unit Seal Kits
Spark plugs	100 hours or annually	Check gap and insulator color; replace if fouled or worn	Spark Plugs
Fuel filter / water separator	100 hours or seasonally	Replace inline filter; drain/replace any external separator to prevent lean issues	Fuel Filters
Water pump impeller/kit	200 hours or every 2 years	Replace sooner if telltale is weak or overheating occurs	Yamaha Water Pump Repair Kits
Anodes (internal/external)	Inspect 50 hours; replace as needed	Use the correct alloy for your water (salt, brackish, or fresh)	Yamaha Anodes
Thermostat	Every 2 years	Replace if engine runs cold or overheats; clean housing and replace gasket	Yamaha Outboard Parts
Propeller & hardware	Inspect every 50 hours	Check for dings, bent blades, and worn thrust washer; remove to check for fishing line in seals	Yamaha Propellers

Frequently Used Parts Categories

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

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak telltale or overheat alarm	Inspect intake screens for debris; verify strong water stream; test thermostat	Water pump kit, thermostat, intake screen grommets, anodes
Poor acceleration or power loss	Check prop for damage; replace fuel filter; inspect plugs; drain stale fuel	Propeller, fuel filter, spark plugs, carburetor rebuild kit
Hard starting or rough idle	Verify choke/prime start operation; clean idle circuits; check primer bulb and fuel lines	Spark plugs, carburetor kit, primer bulb, fuel pump
Gearcase noise or metal in gear oil	Inspect oil for water/metal; check prop shaft for fishing line; pressure test gearcase	Lower unit seal kit, shims/thrust washer, bearings (as needed)
Battery not charging	Load test battery; inspect rectifier/regulator connections and grounds	Rectifier/regulator, stator/charging coil, fuses, wiring connectors

FAQs

Are parts interchangeable between different years or platforms?

Some wear items (filters, plugs, impellers) are shared across F15C/D variants, but ignition, bracket, cowling, and gearcase parts can vary. Always match the full model code and suffix before ordering.

When should I replace the water pump impeller?

Replace the impeller every 200 hours or 2 years, whichever comes first. Replace sooner if the telltale is weak, you ran through sand, or the engine overheated.

How often should I change lower unit gear oil?

At least every 100 hours or annually. Inspect for metal flakes or milky color; if present, reseal the gearcase before returning to service.

What information helps confirm part compatibility?

Provide the exact Yamaha model code (e.g., F15… with suffix), serial number, shaft length (S/L), start type (manual/electric), and whether it’s tiller or remote control.

Ready to find parts for your Yamaha 4‑Stroke 15HP? Browse the main Yamaha collection to filter by horsepower, year, and model.

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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.