OMC 4-Stroke 115HP Outboard Marine Engine Parts

(5 products)

This page is tailored for OMC 4-Stroke 115 HP outboard engines. Use it to locate compatible parts and service information, including maintenance tips, common replacement items, and troubleshooting guidance. You can also browse the main Johnson/Evinrude/OMC collection. Scroll to the bottom of this page to start browsing parts for this engine, and remember that on the collection page you can use the Filter & Sort controls to narrow results by horsepower, year range, and part category.

Browse All Johnson/Evinrude/OMC Parts

How to Identify Your 115 HP Model

Nameplate location: Look for the identification decal/plate on the transom bracket (usually starboard side) or under the engine cowl. Record the model number and serial number.
Model code and suffix: The code typically embeds horsepower and variant details. Suffix letters often indicate shaft length (S=15 in, L=20 in, XL=25 in) and other features. Serial numbers help confirm exact year/version.
Platform distinctions: 4-stroke 115 HP models are commonly inline-4. Across year ranges you may see updates in fuel/ignition management. Verify with your model/serial before ordering parts.
Other clues: Note control type (tiller vs remote), charging output, and whether the engine uses mechanical or electronic fuel delivery—these can affect certain service parts.

Engine Overview

Inline‑4 4‑Stroke (115 HP)

Feature	Description
Configuration	Inline‑4, 4‑stroke outboard; electronic ignition; fuel system varies by year (carb/EFI).
Common Models	OMC/Johnson‑Evinrude 115 HP 4‑stroke outboard variants (verify with model and serial for exact fit).
Advantages	Quiet operation, strong mid‑range torque, improved fuel economy vs. comparable 2‑strokes.
Notes	Service parts such as filters, plugs, and impellers are routine replacements. Some items vary by year/shaft length; always confirm with model and serial numbers.

Routine Maintenance & Service Parts

Intervals below are general guidelines for typical 4‑stroke outboards. Always follow the official service manual for your exact model/year and operating conditions.

Item	Interval*	Remarks	Parts Link
Engine oil + oil filter	After break‑in, then every 100 hrs or annually	Use marine‑grade oil of the specified viscosity; replace filter at each oil change.	Oil Filters
Gear oil (lower unit)	Every 100 hrs or annually	Inspect for water intrusion or metal particles; change more often for heavy use.	Lower Unit Seal Kits
Spark plugs	Inspect every 100 hrs; replace 200–300 hrs or as needed	Check gap and insulator color; replace if fouled, worn, or out of spec.	Spark Plugs
Fuel filter / water separator	Every 100 hrs or each season	Replace sooner if contamination or restricted flow is observed.	Fuel Filters
Water pump impeller / kit	Every 2–3 seasons (or 200 hrs), inspect annually	Critical for cooling; replace sooner if weak tell‑tale or overheating occurs.	Johnson/Evinrude/OMC Water Pump Kits
Anodes (sacrificial)	Inspect often; replace when 50% consumed	Choose alloy for your water (zinc, aluminum, or magnesium). Keep mounting points clean.	Johnson/Evinrude/OMC Anodes

Frequently Used Parts Categories

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

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale or overheat alarm	Inspect intake screens for debris, verify water level, check impeller condition and thermostat operation.	Water pump kit (kits), gaskets/seals (gaskets)
Poor acceleration or power loss	Check prop damage/cavitation, test fuel quality, replace/inspect filters, verify spark and compression.	Propeller (props), fuel filters, spark plugs
Hard starting or rough idle	Confirm battery charge and connections, prime the fuel system, check for air leaks, inspect plugs.	spark plugs, fuel filters, ignition switch
Gearcase noise or metal in gear oil	Drain and inspect gear lube; look for water intrusion (milky oil). Pressure test and check seals/bearings.	lower unit seal kits, bearings

FAQs

Are parts interchangeable between different years or platforms?

Some routine service parts (filters, plugs, anodes, impellers) may interchange across multiple years, but ignition, fuel, and cooling components can vary by production run. Always verify using your model and serial numbers before ordering.

When should I replace the impeller?

Inspect annually and replace every 2–3 seasons (or ~200 hours). Replace immediately if you see a weak tell‑tale, elevated temperatures, or after running through sand/debris.

How often should the lower unit gear oil be changed?

Change at least once per year or every 100 hours, and anytime you notice water contamination (milky oil) or after an impact to the prop/gearcase.

What information do you need to confirm part compatibility?

Please provide brand, exact model number, serial number, horsepower, shaft length (S/L/XL), and a description or photo of the component you’re replacing. This ensures we match the correct parts the first time.

Ready to find parts for your OMC 4‑Stroke 115 HP? Browse the main Johnson/Evinrude/OMC collection by horsepower, year, and model to narrow down compatible components.

Shop Johnson/Evinrude/OMC Outboard 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.