Yamaha 2-Stroke 135HP Outboard Marine Engine Parts

(10 products)

This page is dedicated to Yamaha 2‑Stroke 135HP outboard engines. It helps you quickly find compatible parts and essential service information, including maintenance tips, common replacement components, and troubleshooting guidance. You can also browse the main Yamaha collection. Scroll down to the bottom of this page to start browsing parts for this engine, and on the collection page use the Filter & Sort controls to narrow results by horsepower, year range, and part category.

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How to Identify Your 135HP Model

Nameplate location: Look on the starboard clamp bracket or transom mount for the serial/model plate; it lists the model code, serial number, and shaft length.
Reading Yamaha model codes: The model code typically includes horsepower, features, and a year suffix. Shaft length is often shown by letters such as S/L/X/U (short/long/extra/ultra). The suffix letter/number sequence helps identify production year and revision.
2‑Stroke specifics: Many Yamaha 2‑stroke mid‑range models use oil‑injection (Autolube). Confirm if your engine is oil‑injected or pre‑mix (and the specified fuel/oil ratio) before ordering related parts.
Platform cues: Count cylinders and coil packs. Mid‑range 2‑stroke 135HP units are commonly V4; verify by cylinder count and cowl labeling to ensure correct ignition, carburetor, and cooling parts.

Engine Overview

Yamaha Mid‑Range 2‑Stroke (typical for 135HP)

Feature	Description
Configuration	Carbureted 2‑stroke, commonly V4 with oil‑injection (Autolube) on many models; mechanical T/T and conventional reed‑induction intake.
Common Models	135HP 2‑stroke variants within Yamaha’s mid‑range family. Many wear parts cross over with 115/130/140HP V4 counterparts—verify by model code and serial.
Advantages	Relatively light weight, strong hole‑shot, straightforward maintenance, and widely available service components.
Notes	Cooling and ignition parts often vary by year and shaft length. Always match parts to the exact model code, serial, and cylinder count before ordering.

Routine Maintenance & Service Parts

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

Item	Interval*	Remarks	Parts Link
Lower unit gear oil	Every 100 hours or annually	Inspect for water or metal; replace drain plug gaskets; service more often if heavy use.	Yamaha Service & Maintenance Kits
Spark plugs	100 hours or annually	Check heat range and gap for your specific model; replace if fouled.	Spark Plugs
Primary/inline fuel filter	100 hours or annually	Replace more often with ethanol fuel or contaminated fuel sources.	Fuel Filters
Water pump impeller/kit	Every 2 years or 200 hours (yearly in sandy/muddy water)	Critical for cooling. Replace housing/plate as needed.	Yamaha Water Pump Repair Kits
Anodes (internal/external)	Inspect every 50 hours; replace when 50% depleted	Use alloy suited to water (aluminum for mixed/salt, magnesium for fresh).	Yamaha Anodes
Oil‑injection system check	200 hours or every 2 years	Inspect/clean reservoir screen and lines; verify pump operation and bleed procedure. If pre‑mix, confirm correct ratio.	Yamaha Service & Maintenance Kits
Gearcase seals (inspect if water found in oil)	As needed	Milky oil indicates water intrusion; reseal before further use.	Yamaha Lower Unit Seal Kits

Frequently Used Parts Categories

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

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale or overheat alarm	Inspect intake screens, water pump impeller, and thermostat operation.	Water pump repair kit, intake screen, thermostat
Hard starting / rough idle	Check spark plug condition/gap, fuel filter restriction, and primer bulb integrity; verify choke/enrichment.	Spark plugs, fuel filter, fuel line/primer bulb
Poor acceleration / power loss	Look for fouled plugs, carburetor contamination, or timing/ignition faults; confirm prop pitch and damage.	Spark plugs, carb service parts, ignition components, propeller
Excessive smoke (2‑stroke)	Verify oil ratio (pre‑mix) or oil‑injection calibration; check for stuck thermostats causing cold‑running.	Oil‑injection components, thermostat, plugs
Gearcase noise / metal in gear oil	Drain oil and inspect for shavings; check prop shaft for fishing line; pressure/vacuum test for seal leaks.	Lower unit seal kit, drain plug gaskets, gear lube

FAQs

Are parts interchangeable between different years or platforms?

Some wear items (spark plugs, anodes, impellers) overlap across Yamaha mid‑range 2‑stroke families, but ignition, cooling, and carburetor parts can change by year, shaft length, and model revision. Always confirm with your full model code and serial number.

When should the impeller be replaced?

As a rule, replace the impeller every 2 years or 200 hours—yearly if operating in sandy, silty, or shallow waters. If the tell‑tale is weak or the engine overheats, service the pump immediately.

How often should I change the gear oil?

Change lower unit gear oil every 100 hours or annually. If you see milky oil, water is present—stop running, reseal the gearcase, and refill with fresh lubricant before further use.

What information do you need to confirm part compatibility?

Provide the full Yamaha model code, serial number, horsepower, shaft length, and whether the engine is oil‑injected or pre‑mix. A photo of the nameplate on the bracket is very helpful.

Ready to find the right components? Browse the main Yamaha collection and filter by horsepower, year, and model to locate compatible parts for your Yamaha 2‑Stroke 135HP outboard.

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