Evinrude 2-Stroke 35-55HP Outboard Parts

(2 products)

This page supports Evinrude 2‑Stroke 35–55HP outboard engines and helps you quickly find compatible parts and service information. Below you’ll find maintenance tips, frequently used replacement parts, and troubleshooting guidance. You can also browse the main Johnson/Evinrude collection for a wider selection. Scroll to the bottom of this page to start browsing parts for this engine, and remember you can 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 35–55HP Model

Locate the nameplate/serial tag on the transom clamp bracket or swivel bracket. It lists the model, serial number, and horsepower.
Read the model code: suffixes often indicate shaft length (S=15", L=20"), start type (E=Electric), and power trim/tilt (T). Year coding varies by era—match the full model string to confirm parts.
Platform clues: most 40–55HP in this era are 2‑cylinder carbureted 2‑strokes. Earlier 35HP models are similar twins. Count two ignition coils and two spark plugs per bank.
Oil system: pre‑mix models run 50:1 TC‑W3 fuel/oil; VRO/OMS models have an oil tank and pump—verify which you have before ordering fuel/oil components.

Platform Overview

Evinrude 2‑Stroke 35–55HP (Twin‑Cylinder)

Feature	Description
Configuration	2‑cylinder, carbureted 2‑stroke; mechanical fuel pump; CDI/Powerpack ignition. Earlier crossflow and later loop‑charged variants exist.
Common Models	35, 40, 45, 48, 50, 55HP 2‑Stroke models from roughly the 1970s through the 2000s.
Advantages	Lightweight, simple to service, strong low‑to‑midrange torque, broad parts availability.
Notes	Many cooling, ignition, and fuel components overlap across horsepower and years—always verify by full model and serial. Prop shafts are commonly 13‑spline on small gearcases.

Routine Maintenance & Service Parts

Intervals below are general guidelines; always follow your engine’s official service manual for exact procedures and specifications.

Item	Interval*	Remarks	Parts Link
Gear oil (lower unit)	Every 100 hrs or annually	Inspect for water/milkiness. If contaminated, service seals before reuse.	Johnson/Evinrude/OMC Lower Unit Seal Kits
Spark plugs	Inspect at 50 hrs; replace 100 hrs/annual	Use correct heat range and gap; replace if fouled or worn.	Spark plug
Fuel filter / in‑line filter	Inspect 50 hrs; replace annually	Prevent debris and varnish; replace aged fuel lines as needed.	Fuel Filters
Water pump impeller / kit	Every 2–3 seasons or 200 hrs	Replace sooner if weak tell‑tale, overheat alarms, or sandy use.	Johnson/Evinrude/OMC Water Pump Repair Kits
Anodes (zincs)	Inspect 50 hrs; replace at ~50% loss	Essential for corrosion protection in brackish/salt water.	Johnson/Evinrude/OMC Anodes
Thermostat	Inspect every 2–3 seasons	Stuck stats cause overheat or cold‑running (rich) conditions.	Johnson/Evinrude
Oil system (VRO) or pre‑mix	Annual inspection	Verify VRO/OMS pump output and lines; pre‑mix models run 50:1 TC‑W3.	Johnson/Evinrude
Propeller & hardware	Inspect each season	Check for dings and hub slip; remove annually to grease shaft.	Johnson/Evinrude/OMC Propellers

Frequently Used Parts Categories

Routine Service: Johnson/Evinrude/OMC Service & Maintenance Kits
Cooling System: Water Pump Repair Kits
Fuel System: Fuel Filters and Fuel Pumps
Ignition / Electrical: Electrical Items
Gearcase & Seals: Lower Unit Seal Kits
Propellers & Hardware: Propellers
Corrosion Protection: Anodes

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale or overheat alarm	Inspect gearcase water inlets for blockage; verify impeller condition; test thermostat opening; look for kinked hoses.	Water pump kit, intake screens, thermostat, water tube grommets
Poor acceleration or power loss	Check for damaged or wrong‑pitch prop; verify spark on both cylinders; inspect fuel filter and primer bulb; confirm compression.	Propeller, spark plugs, fuel filter, fuel pump diaphragm
Hard starting / rough idle	Confirm choke/primer operation; drain stale fuel; check for air leaks in fuel lines; clean/sync carburetors and set idle mixture.	Carb repair kit, fuel lines/hoses, primer solenoid, spark plugs
Excessive smoke	Verify correct 50:1 pre‑mix or oil pump output; ensure thermostat closes to reach operating temp; avoid prolonged cold idling.	Thermostat, spark plugs, oil pump/lines
Gearcase noise or metal in gear oil	Check oil level and condition; inspect for fishing line on prop shaft; pressure/vac test gearcase for seal leaks.	Lower unit seal kit, gear oil, prop shaft seals

FAQs

Are parts interchangeable across different years or horsepower in this range?

Many components are shared among 35–55HP twin‑cylinder Evinrude models, but ignition, carburetion, and cooling details can change by year and variant. Always confirm with your full model and serial number before ordering.

When should I replace the impeller?

As a rule of thumb, replace the impeller every 2–3 seasons or ~200 hours, and immediately if you see a weak tell‑tale or overheat warnings—especially after running in sandy or silty water.

How often should lower unit gear oil be changed?

Change gear oil every 100 hours or annually. If you find water (milky oil) or metal shavings, correct the issue and consider a reseal before returning the boat to service.

What information do you need to verify part compatibility?

Please provide the complete model number, serial number, shaft length, and any notable options (electric start, power trim/tilt, VRO/OMS). Photos of the nameplate and the part being replaced are very helpful.

Ready to find parts by horsepower, year, and model? Browse our main Johnson/Evinrude collection to filter and sort the catalog for your exact outboard.

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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.