Yamaha 80HP 2-Stroke Outboard Marine Engine Parts

(46 products)

This page is for Yamaha 2-Stroke 80HP outboard engines. Use it to find compatible parts and practical service information, including maintenance tips, common replacement items, and troubleshooting guidance. You can also browse our main Yamaha collection. Scroll 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/section.

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How to Identify Your 80HP Model

Locate the model/serial tag on the top outside edge of the clamp bracket, or on the top of the swivel bracket (port or starboard).
Read the model code and suffix: examples include 80TLRX and 80TLRY (letters often indicate features like power trim/tilt, shaft length S=153, L=203, X=253, and a year code). Confirm against your exact tag.
Platform cues: 2-stroke, carbureted inline-3. Most units use Yamaha Autolube oil injection; some commercial variants may be premix—verify on your engine.
If unsure, photograph the tag and cowling markings. Matching by full model code and serial ensures correct parts.

Engine Overview

Yamaha 80HP 2-Stroke Inline-3

Feature	Description
Configuration	Inline-3, carbureted 2-stroke with reed intake; most models equipped with Yamaha Autolube oil injection.
Common Models	Examples: 80TLRX, 80TLRY (late 1990s2003 availability varies by market).
Advantages	Light weight, straightforward maintenance, strong mid-range torque suitable for many 1720 ft boats.
Notes	Numerous service parts are shared across the Yamaha 75/80/90 3-cylinder family from the same era; always confirm with the exact model code and serial.

Routine Maintenance & Service Parts

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

Item	Interval*	Remarks	Parts Link
Gear oil (lower unit)	Every 100 hours or annually	Inspect for metal or milky oil; replace gaskets on drain/fill screws.	Yamaha Outboard Parts
Spark plugs	100 hours or annually	Check gap and insulator color; replace if fouled or worn.	Spark Plugs
Inline fuel filter / water separator	100 hours or annually (inspect more often in harsh fuel conditions)	Replace sooner if contamination or restriction is found.	Fuel Filters
Water pump impeller / kit	Every 2 seasons or 200 hours (annually if sandy/silty)	Weak tell-tale or overheat alarms often trace to a worn impeller.	Yamaha Water Pump Repair Kits
Anodes (internal & external)	Inspect every 50 hours; replace when ~50% consumed	Choose alloy to match your water (salt, brackish, or fresh).	Yamaha Anodes
Oil injection system check (2-stroke)	Pre-season and after any fuel system work	Verify pump output, lines, and strainer; use NMMA TC-W3 oil. Premix models: confirm ratio.	Yamaha Outboard Parts
Lower unit seals (if water intrusion)	As needed after pressure/vacuum test	Replace propshaft/driveshaft seals if gear oil turns milky.	Yamaha Lower Unit Seal Kits
Carburetor clean/sync	As needed for rough idle or hesitation	Clean jets and passages; synchronize throttle plates per manual.	Carburetor

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
Seals & Gaskets: Yamaha Gaskets

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell-tale or overheat alarm	Inspect intake screens for debris; confirm strong primer bulb; test water pump output; verify thermostat operation.	Water pump kit, thermostat, intake screen
Poor acceleration / power loss	Check fuel quality; replace fuel filter; inspect prop for damage; verify throttle opening and carb synchronization; run compression test.	Fuel filter, carburetor kit, spark plugs, propeller
Hard starting / rough idle	Confirm primer/enrichment operation; inspect fuel lines and bulb; check plug condition and gap; look for vacuum leaks.	Spark plugs, fuel filter, hoses, carburetor components
Excessive smoke (2-stroke)	Verify oil injection settings or premix ratio; ensure choke isn9;t stuck; check thermostat so engine reaches temp.	Oil pump/lines, spark plugs, thermostat
Gearcase noise or metal in gear oil	Check oil level/condition; inspect propshaft for fishing line; perform pressure/vacuum test for seal integrity.	Lower unit seal kit, propeller hub, gear oil

FAQs

Are parts interchangeable between different years or the 75/80/90 platforms?

Many service parts (impellers, anodes, some gaskets and ignition items) span the Yamaha 3-cylinder 75/80/90 2-stroke family. However, there are year- and model-specific differences. Always confirm with the exact model code and serial on the nameplate.

When should I replace the impeller?

As a rule of thumb, replace every 2 seasons or 200 hours, and sooner if operating in sandy or silty water, or if you notice a weak tell-tale or overheating.

How often should the lower unit gear oil be changed?

Change every 100 hours or annually, and immediately after any suspected water intrusion (milky oil) or an underwater strike.

What information do you need to confirm part compatibility?

Please provide the full model code, serial number, shaft length (S/L/X), control type (tiller or remote), and country of market if known. A photo of the nameplate is ideal.

Ready to shop? Browse the main Yamaha collection and narrow by horsepower, year, and model to find parts that fit your engine.

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If you9;re unsure about your model, send us a photo of the nameplate and the part you need and we9;ll help verify compatibility.