OMC 2-Stroke 15HP Outboard Marine Engine Parts

(2 products)

This page is for OMC 2-Stroke 15HP outboard engines. Use it to find compatible parts and service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse our main Johnson/Evinrude/OMC collection. Scroll to the bottom to start browsing parts for this engine, and remember you can use the Filter & Sort controls on collection pages to narrow results by horsepower, year range, and part category.

Browse All Johnson/Evinrude/OMC Parts

How to Identify Your 15HP Model

Find the ID plate on the clamp bracket or on the swivel bracket (port or starboard). The tag shows model and serial information.
Model code basics: “15” indicates horsepower. Letters commonly denote start type (E = electric, R = rope), shaft length (L = long), and additional year/feature suffixes.
These 2-stroke 15HP units are typically twin-cylinder, carbureted models. Most use 50:1 premix (TC-W3) unless otherwise specified by the engine’s decals/manual.
When ordering parts, match the full model code and note features like shaft length and start/control type to ensure fit.

Engine/Platform Overview

OMC 15HP 2‑Stroke Twin (Carbureted)

Feature	Description
Configuration	Inline-2, carbureted 2-stroke; manual or electric start; short or long shaft variants.
Common Models	Examples include codes such as E15ECSD, E15RLCNC, E15ELCTR, E15RLCEC (representative of early-1980s to late-1980s production).
Advantages	Lightweight and simple; strong low-end thrust for small boats; easy routine service with widely available parts.
Notes	Some ignition, carburetor, and gearcase details vary by year and start/shaft options. Always confirm by complete model number before ordering.

Routine Maintenance & Service Parts

Intervals below are typical guidelines for small 2-stroke outboards. Always follow your official service manual for your specific model and operating conditions.

Item	Interval*	Remarks	Parts Link
Gear oil (lower unit)	Every 100 hours or annually	Inspect magnet/drain plug for metal; replace seals if water intrusion 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. Fouling is common with rich mix or extended trolling.	Spark plug
Fuel filter / inline filter	100 hours or annually	Replace sooner if fuel contamination or storage issues are suspected.	Fuel Filters
Water pump impeller / kit	Every 2–3 seasons (or 200 hrs)	Replace sooner after an overheat or if telltale stream is weak.	Johnson/Evinrude/OMC Water Pump Repair Kits
Anodes (corrosion protection)	Inspect every 50 hours; replace when 50% worn	Use the correct material for your water (salt, brackish, fresh).	Johnson/Evinrude/OMC Anodes
2‑Stroke oil mix / injection system	Every fill-up; inspect system seasonally	Typical premix is 50:1 with TC‑W3 oil unless your model specifies otherwise. Inspect lines and primer bulb.	Johnson/Evinrude/OMC Outboard Parts
Thermostat inspection	Test every season	Replace if stuck open/closed or if overheat/low temp symptoms appear.	Johnson/Evinrude/OMC Outboard Parts

Frequently Used Parts Categories

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

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak telltale stream / overheat alarm	Inspect intake screen for blockage, verify water pump impeller condition, and test thermostat.	Water pump kit, thermostat, intake screen, gaskets
Hard starting / rough idle	Check fuel freshness, primer bulb, filter, and spark plug condition; clean/adjust carburetor.	Fuel filter, spark plugs, carburetor kit, primer bulb
Poor acceleration / power loss	Inspect prop for damage or wrong pitch; verify compression and ignition; check fuel pump output.	Propeller, spark plugs, fuel pump, reed/air intake components
Excessive smoke (2‑stroke)	Confirm correct oil ratio; verify choke operation and carb float/needle; replace fouled plugs.	Spark plugs, carburetor needle/seat, choke components
Gearcase noise / metal in oil	Check oil level/condition; pressure test gearcase for seal leaks; inspect prop shaft for fishing line.	Lower unit seal kit, gear oil service supplies, bearings

FAQs

Are parts interchangeable across different years?

Many wear items carry over across mid‑1970s to early‑1990s OMC 15HP twins, but there are differences in ignition, carburetion, and gearcase components between specific model codes. Always confirm by model number and features like start type and shaft length.

When should I replace the impeller?

As a preventive measure, replace every 2–3 seasons or about 200 hours, and immediately after any overheat or if the telltale stream is weak or intermittent.

How often should I change the gear oil?

At least once per season or every 100 hours. If the oil looks milky or contaminated, pressure test the gearcase and renew seals before refilling.

What information helps confirm part compatibility?

Provide the full model number from the bracket tag, serial number, shaft length (S/L), start type (rope/electric), and control type (tiller/remote). Photos of the nameplate and the part needing replacement are also helpful.

Ready to find parts for your OMC 2‑Stroke 15HP? Browse the Johnson/Evinrude/OMC collection and use Filter & Sort to narrow by horsepower, year, and model.

Shop Johnson/Evinrude/OMC 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.