Yamaha 150HP 2-Stroke Outboard Engine Parts

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This page focuses on Yamaha 2-Stroke 150 HP outboard engines and helps you find compatible parts and service information. Inside you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse our main Yamaha collection anytime. Scroll to the bottom of the page to start browsing parts for this engine, and use the Filter & Sort controls on the collection page to narrow results by horsepower, year range, and part category.

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How to Identify Your 150 HP Model

Nameplate location: Look for the Yamaha model/serial tag on the top outside edge of the clamp bracket or on the swivel bracket (port or starboard).
Reading Yamaha model codes: Examples include 150TLR-, 150TXR-, V150TLR-, and Z150TXR-. The letters typically indicate shaft length (L=20", X=25"), control/trim type (T=power trim), and a year code suffix.
Platform clues: Carbureted models usually lack high-pressure fuel components. EFI/OX66/HPDI versions may show an OX66 label, have a vapor separator tank (VST), electric high-pressure pump, and additional fuel filters.
2‑Stroke oiling: Most 150 2‑stroke models use oil injection with a remote tank. Confirm that the oil tank, lines, and pump are present and functioning for correct parts selection.

Platform Overview

V6 2‑Stroke Carbureted

Feature	Description
Configuration	V6 2‑stroke, carbureted induction (popular through late 1980s–1990s).
Common Models	150TLRP, 150TXRP, 150TLRW, V150TLRY (representative examples).
Advantages	Straightforward service, strong mid‑range torque, widely available wear parts.
Notes	Carb settings and ignition components may vary by year. Verify model code and serial tag before ordering electrical and carb kits.

V6 2‑Stroke EFI/OX66/HPDI

Feature	Description
Configuration	V6 2‑stroke with electronic fuel injection (OX66) or high‑pressure direct injection (HPDI) on later variants.
Common Models	Z150TXRA, LZ150TXRY, 150TXRZ (EFI/HPDI family examples).
Advantages	Improved fuel economy and emissions vs. carb models; better cold start behavior.
Notes	Fuel system service is more sensitive: keep filters, VST components, and high‑pressure pumps clean. Some ignition, sensor, and fuel parts are platform‑specific.

Routine Maintenance & Service Parts

Intervals below are general guidelines for Yamaha 2‑stroke V6 outboards. Always follow the official service manual for your exact model and operating conditions.

Item	Interval*	Remarks	Parts Link
Gear oil (lower unit)	Every 100 hours or annually	Inspect for water/metal. Reseal if oil is milky or contaminated.	Yamaha Lower Unit Seal Kits
Spark plugs	Every 100 hours or annually	Use correct heat range and gap. Replace if fouled or worn.	Spark Plugs
Fuel filter / inline filter	Inspect every 50 hours; replace at 100 hours	Drain water separator (if equipped). Keep EFI/HPDI filters clean.	Fuel Filters
Water pump impeller/kit	Every 2 seasons or 200 hours	Replace sooner if weak tell‑tale or overheat occurs.	Yamaha Water Pump Repair Kits
Anodes (internal & external)	Inspect every 50 hours; replace when 50% depleted	Match anode material to water type (salt/brackish/fresh).	Yamaha Anodes
Oil injection system (tank/strainer/lines)	Inspect every 100 hours; renew filters annually	Verify pump output and alarm function; replace brittle hoses.	Hoses
Propeller inspection	Every trip; remove annually	Check for dings, hub wear; remove to clear fishing line from seals.	Yamaha Propellers

*Shorten intervals for heavy use, towing, high heat, or silty/sandy waters.

Frequently Used Parts Categories

Routine Service Kits – Yamaha Service & Maintenance Kits
Cooling System – Yamaha Water Pump Repair Kits
Fuel Filtration – Fuel Filters
Fuel Delivery – Fuel Pumps
Ignition / Electrical – Yamaha Starters
Drivetrain Sealing – Yamaha Lower Unit Seal Kits
Corrosion Protection – Yamaha Anodes

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale or overheat alarm	Inspect intake screens, tell‑tale hose, thermostat operation, and impeller condition.	Water pump kit, thermostat, tell‑tale hose, poppet valve.
Poor acceleration or power loss	Check fuel freshness, spin‑on/separator and inline filters, spark plug condition, and prop damage/slip.	Fuel filters, spark plugs, propeller, reed valves (as applicable).
Hard starting / rough idle	Prime fuel bulb, verify choke/prime‑start, clean carbs (carb models) or inspect VST/HP filter (EFI/HPDI).	Primer bulb, fuel pump, carb kits, VST/HP filters.
Excessive smoke (2‑stroke)	Confirm oiling rate, verify oil pump linkage/index, check for stuck check valves and cold‑running thermostat.	Oil pump, oil lines/check valves, thermostat, spark plugs.
Gearcase noise or metal in oil	Drain and inspect gear lube; check for fishing line at prop shaft; pressure/vacuum test for leaking seals.	Gear lube, lower unit seal kit, bearings.

FAQs

Are parts interchangeable between different years or platforms?

Many wear items interchange across multiple years, but ignition, fuel system, and some gaskets and sensors differ between carbureted and EFI/HPDI platforms. Always confirm with your full model code and serial tag before ordering.

When should I replace the water pump impeller?

As a rule of thumb, every 2 seasons or 200 hours—sooner if you see a weak tell‑tale, run sandy/silty water, or the engine overheated.

How often should I change the gear oil?

Change every 100 hours or annually. If water or metal is found, service the seals and re‑test before running again.

What information do you need to confirm part compatibility?

Please provide the full Yamaha model code (e.g., 150TXRZ), serial number, shaft length (L/X), and whether your engine is carbureted, EFI/OX66, or HPDI.

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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.