OMC 4-Stroke 110HP Marine Engine Parts

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This page is dedicated to OMC 4-Stroke 110HP outboard engines. Use it to find compatible parts and service information, including maintenance tips, common replacement items, and troubleshooting guidance. You can also browse our main Johnson/Evinrude/OMC collection. Scroll to the bottom of this page to start browsing parts for your 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 110HP Model

Locate the nameplate/serial plate on the transom bracket or swivel bracket. It typically lists the model code, serial number, and shaft length.
Read the model code and suffix: letters often indicate shaft length (e.g., S/L/XL), control type (tiller/remote), and market year. Keep these handy when checking parts.
Confirm it is a 4-stroke model. OMC/Johnson/Evinrude 110HP designations exist in both older 2-stroke and later 4-stroke platforms; parts are not interchangeable across stroke types.
Check the engine cover label and intake layout: 4-stroke 110HP engines are commonly inline-4 with EFI or carburetion, using an oil filter and separate engine oil reservoir.

Engine Platform Overview

Inline-4 4-Stroke Platform (Typical for 110HP)

Feature	Description
Configuration	Inline-4, 4-stroke, typically EFI (some units may be carbureted). Electric start, remote control or tiller variants.
Common Models	110HP 4-stroke outboard models in the 90–115 inline-4 family; verify by model code and serial for exact parts matching.
Advantages	Good fuel economy, quiet operation, broad mid‑range torque, straightforward service access for filters and plugs.
Notes	Some parts are shared with 90–115HP siblings (cooling and gearcase components), but confirm gaskets, sensors, and calibration-specific items by model code.

Routine Maintenance & Service Parts

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

Item	Interval*	Remarks	Parts Link
Engine oil & filter	100 hours or annually	Use marine 4-stroke oil of the specified viscosity; replace filter at each oil change.	Oil Filters
Gear oil (lower unit)	100 hours or annually	Inspect for water intrusion and metal shavings; replace seals if contamination is found.	Johnson/Evinrude/OMC Lower Unit Seal Kits
Spark plugs	100 hours or annually	Replace if fouled, worn, or out of gap; verify heat range per model.	Spark Plugs
Fuel filter / water-separating filter	100 hours or annually	Replace more often with ethanol fuel or contaminated fuel supply.	Fuel Filters
Water pump impeller/kit	2–3 seasons or 200 hours	Shorten interval if operating in sandy, silty, or weedy water.	Johnson/Evinrude/OMC Water Pump Repair Kits
Anodes (sacrificial)	Inspect every 50 hours; replace when 50% consumed	Choose alloy for your water (salt, brackish, or fresh).	Johnson/Evinrude/OMC Anodes
Thermostat inspection	Every 2 years	Replace if stuck or if engine runs too cool/hot.	Johnson/Evinrude/OMC Outboard Parts
Propeller & hardware	Inspect every service	Check for dings, bent blades, and worn hub; verify thrust washer and nut condition.	Johnson/Evinrude/OMC Propellers

*Intervals are typical for recreational use; adjust for heavy-duty or commercial operation.

Frequently Used Parts Categories

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

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak telltale stream / overheat alarm	Inspect intake screens for blockage, verify impeller condition, and confirm thermostat operation.	Water pump kit, thermostat, intake screen, anodes
Poor acceleration / power loss	Check propeller for damage/cavitation, verify fuel quality and filter condition, and inspect spark plugs.	Propeller, fuel filter, spark plugs
Hard starting / rough idle	Prime fuel system, check for air leaks in fuel lines, evaluate plug gap/condition; on EFI, verify idle air control and sensor connections.	Fuel filter, hoses, spark plugs, electrical items
Gearcase noise or metal in gear oil	Confirm correct oil level; check for water intrusion; pressure/vacuum test if seals are suspect.	Lower unit seal kit, drain/fill seals, prop shaft seals

FAQs

Are parts interchangeable between different years or platforms?

Not always. The 110HP name spans multiple platforms (2-stroke and 4-stroke, carbureted and EFI). Match parts using the exact model code, serial number, and stroke type to avoid incompatibility.

When should I replace the water pump impeller?

For recreational use, replace every 2–3 seasons or about 200 hours. Shorten the interval if you run in sandy/silty water or notice a weak telltale stream or overheat events.

How often should gear oil be changed?

Change lower unit gear oil at least every 100 hours or annually. Inspect immediately after any propeller impact or suspected water intrusion.

What information do you need to confirm part compatibility?

Provide the model code, serial number, shaft length, control type, and a photo of the nameplate. Photos of the part or area needing service also help confirm fitment.

Ready to find parts for your OMC 4-Stroke 110HP? Browse the main Johnson/Evinrude/OMC collection by horsepower, year, and model to zero in on compatible components.

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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.