OMC 50HP 2-Stroke Outboard Parts

(3 products)

This page is tailored for OMC 2‑Stroke 50 HP outboard engines. Use it to find compatible parts and service information, including maintenance tips, frequently replaced parts, and troubleshooting guidance. You can also browse the main Johnson/Evinrude/OMC collection, and at the bottom of this page you’ll find an easy way to start browsing parts for this engine. 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 50 HP Model

Find the nameplate/serial tag on the top outside edge of the clamp bracket or on top of the swivel bracket (port or starboard).
Model codes include letters for features such as shaft length, electric start/trim, and control type; the suffix typically indicates model year. Example formats you may see include codes like J50BELCTA or J50TLCOB.
OMC 50 HP 2‑Stroke models span multiple years (commonly 1970s–early 1990s). Verify exact model/serial to ensure parts match your ignition, gearcase, and mounting options.
2‑Stroke note: some engines are premix while others use oil injection. Confirm your fuel/oil system type before ordering fuel or lubrication components.

Engine Platform Overview

OMC 50 HP 2‑Stroke (carbureted)

Feature	Description
Configuration	Carbureted 2‑Stroke outboard, commonly inline‑2; variations exist by year for ignition and gearcase.
Common Models	Examples include J50BELCTA, J50TLCOB, J50BECRM, J50BEETB (verify by exact model tag).
Advantages	Simple carburetion, responsive mid‑range, parts availability across many years.
Notes	Match parts by model/serial. Gearcase and electrical components can differ by year and by remote/tiller and shaft length options.

Routine Maintenance & Service Parts

Intervals below are general guidelines for typical use. Always follow the service schedule and specifications in your official OMC/Johnson/Evinrude manual.

Item	Interval*	Remarks	Parts Link
Gear oil (lower unit)	Every 100 hours or annually	Inspect for water intrusion/metal; replace seals if contamination is found.	Johnson/Evinrude/OMC Lower Unit Seal Kits
Spark plugs	Inspect every 50 hours; replace 100 hours/season	Use correct heat range and gap per manual; fouling can indicate carb or oiling issues.	Johnson/Evinrude/OMC Outboard Parts
Fuel filter / inline filter	100 hours or annually	Replace more often with ethanol fuels or storage; check primer bulb and lines.	Fuel Filters
Water pump impeller/kit	Annually or every 100 hours	Essential for cooling; replace sooner if weak telltale or overheat alarms.	Johnson/Evinrude/OMC Water Pump Repair Kits
Anodes (zincs)	Inspect every 50 hours; replace when 50% gone	Choose alloy for your water (salt, brackish, fresh). Clean mounting surfaces.	Johnson/Evinrude/OMC Anodes
Oil injection system (if equipped)	Inspect each season	Check tank, lines, filter/strainer, and pump operation; replace aged hoses.	Johnson/Evinrude/OMC Hoses
Premix ratio (if no injection)	Each refuel	Typical 50:1 with TC‑W3 oil; verify your model’s spec.	Johnson/Evinrude/OMC Outboard Parts

Frequently Used Parts Categories

Routine Service — Johnson/Evinrude/OMC Service & Maintenance Kits
Cooling System — Water Pump Repair Kits
Fuel System — Fuel Filters
Ignition / Electrical — Electrical Items
Corrosion Protection — Anodes
Propulsion — Johnson/Evinrude/OMC Propellers
Gearcase Service — Lower Unit Seal Kits

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak telltale or overheat alarm	Inspect intake screens for debris, verify strong telltale, check impeller and thermostat	Water pump repair kit, thermostat, intake screen
Poor acceleration / power loss	Confirm fresh fuel and correct mix, check fuel filter and carburetor cleanliness, inspect prop for damage	Fuel filter, spark plugs, carburetor components, propeller
Hard starting / rough idle	Verify primer/choke operation, plug condition and gap, compression balance	Spark plugs, fuel pump/lines, carburetor kit
Excessive smoke (2‑Stroke)	Confirm premix ratio or oil injection calibration; look for stuck thermostat causing cold running	Spark plugs, oil lines/hoses, thermostat
Gearcase noise or metal in oil	Drain and inspect gear oil; check for water intrusion and seal wear	Lower unit seal kit, bearings, gear oil

FAQs

Are parts interchangeable between different 50 HP years or platforms?

Some parts carry across years, but many items (ignition, carburetors, gearcase components, controls) vary by model code and year suffix. Always match by the exact model and serial information on your engine tag.

When should the impeller be replaced?

As a preventive measure, replace the impeller annually or every 100 hours. Replace sooner if you notice a weak telltale, overheat alarms, or sand/silt operation.

How often should I change the gear oil?

Change lower unit gear oil every 100 hours or at least once per season. If you see milky oil or metal debris, service seals and inspect internal components before further operation.

What information do you need to confirm part compatibility?

Please provide the full model number, serial number, approximate year, shaft length, control type (tiller/remote), and any relevant casting numbers. 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/OMC catalog to locate components that fit your OMC 2‑Stroke 50 HP 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.