Yamaha 115HP 2-Stroke Outboard Engine Parts

(60 products)

This page is dedicated to Yamaha 2-Stroke 115HP outboard engines. Use it to find compatible parts and service information, including maintenance tips, common replacement parts, 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.

Browse All Yamaha Parts

How to Identify Your 115HP Model

Find the nameplate/serial plate on the transom clamp bracket or swivel bracket. It lists the model code, serial (PID), and sometimes the shaft length.
Model codes (e.g., 115TLRX, 115TXRX, 115TJRX) include letters indicating control type and shaft length; the final letter(s) often encode the year. Cross-check against your owner’s/service manual.
These 2-stroke 115s are typically V4, carbureted engines with oil injection. A remote oil tank and under-cowl oil pump are common identifiers versus premix-only small motors.
Some gearcase and midsection components interchange with the Yamaha 130HP of similar years; verify by model code before ordering.

Platform Overview

V4 Carbureted 2‑Stroke (approx. 1990s–early 2000s)

Feature	Description
Configuration	V4, carbureted 2‑stroke with oil injection (remote oil tank + under-cowl pump); conventional mechanical ignition/charging.
Common Models	Examples include 115TLRX, 115TXRX, 115TJRX (examples only; verify your exact code).
Advantages	Strong mid‑range torque, relatively light for its output, straightforward maintenance.
Notes	Many midsection/gearcase parts overlap with 130HP versions of the same era. Carb jetting and electrical components can vary by year and market—match by model code before ordering.

Routine Maintenance & Service Parts

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

Item	Interval*	Remarks	Parts Link
100‑Hour/Annual Service Kit	Every 100 hours or annually	Bundle for routine items (plugs, filters, water pump components may vary by kit). Check contents match your model code.	Yamaha Service & Maintenance Kits
Gear Oil (Lower Unit)	Every 100 hours or annually; inspect mid‑season	Change oil; check for metal or milky oil. Replace seals if water intrusion is found.	Yamaha Lower Unit Seal Kits
Spark Plugs	Inspect 50–100 hours; replace as needed	Check gap and color; replace if fouled or worn.	Yamaha
Fuel Filter / Inline Filter	Every 100 hours or each season	Replace to prevent lean running and hesitation; drain any water separators regularly.	Fuel Filters
Water Pump Impeller / Kit	Every 2 seasons or 200 hours (sooner in sandy/silty water)	Restore cooling system performance; inspect wear plate and housing.	Yamaha Water Pump Repair Kits
Anodes (Internal/External)	Inspect every 50 hours; replace when 50% consumed	Choose the correct alloy for your water (zinc, aluminum, or magnesium).	Yamaha Anodes
Oil Injection System Service	Inspect each season	Check remote tank strainer, under‑cowl filters, lines, and priming. Use TC‑W3 oil; confirm calibration per manual.	Yamaha
Propeller & Hardware	Inspect every trip; remove/grease shaft each season	Check for dings/cavitation burn; verify thrust washer and cotter/nut are secure.	Yamaha Propellers

Frequently Used Parts Categories

Routine Service Kits – Yamaha Service & Maintenance Kits
Cooling System (Impellers & Water Pump Kits) – Yamaha Water Pump Repair Kits
Gearcase & Seals – Yamaha Lower Unit Seal Kits
Propellers & Hardware – Yamaha Propellers
Fuel System – Fuel Filters and Fuel Pumps
Ignition / Electrical – Electrical Items
Corrosion Protection – Yamaha Anodes

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale or overheat alarm	Inspect intake screens, thermostat, and impeller; ensure tell‑tale hose is clear.	Water pump kit, thermostat, intake screen
Poor acceleration or power loss	Check prop damage/pitch, fuel filter restriction, carb sync/cleanliness, and spark condition.	Propeller, fuel filters, spark plugs, carb gaskets/jet kits
Hard starting / rough idle	Verify primer/choke operation, plug gap, fresh fuel, and no air leaks in fuel line/primer bulb.	Spark plugs, fuel filters, primer bulb, fuel hoses
Excessive smoke (2‑stroke)	Confirm correct oil injection operation or premix ratio; check for stuck choke or low thermostat temperature.	Oil injection filters/lines, choke solenoid, thermostat
Gearcase noise or metal in gear oil	Drain/inspect gear oil; check for fishing line at prop seals; pressure test for leaks.	Lower unit seal kit, bearings, gear oil

FAQs

Are parts interchangeable between different years or between 115HP and 130HP models?

Some midsection and gearcase parts interchange across model years and with similar‑era 130HP engines, but carburetion, electrical, and gasket sets can differ. Always match by full model code and serial.

When should I replace the water pump impeller?

For typical recreational use, replace the impeller every 2 seasons or about 200 hours. In sandy/silty or weedy conditions, service more frequently. If flow weakens or overheat occurs, service immediately.

How often should I change lower unit gear oil?

Change every 100 hours or annually. If the oil appears milky, metallic, or has a burnt odor, diagnose for leaks or wear and service seals/bearings as needed.

What information do you need to confirm part compatibility?

Provide the full model code (e.g., 115TLRX), serial number, shaft length, and any noted options. A photo of the nameplate and the part to be replaced greatly speeds verification.

Ready to find the right parts? Browse the main Yamaha collection and filter by horsepower, year, and model to zero in on components for your 115HP 2‑stroke.

Shop Yamaha Parts

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.