MARKGOO 28HP 4-Stroke Marine Engine Parts

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This page is for MARKGOO 4-Stroke 28HP outboard engines. Use it to find compatible parts and practical service information. Below you’ll find maintenance tips, frequently replaced parts, and troubleshooting guidance. You can also browse the main Johnson/Evinrude/OMC collection for broader 25–30 HP platform coverage. Scroll to the bottom of this page 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 28HP Model

Locate the identification plate/sticker on the transom bracket or swivel bracket. It lists model code, serial number, and sometimes the production year.
Read the model code carefully: suffix letters often indicate shaft length (S/L/XL), starting method (manual/electric), and control type (tiller/remote).
Confirm it’s a 4-stroke: look for an engine oil dipstick and oil fill cap; 4-strokes also have an external oil filter in most designs.
Match model/serial to parts: neighboring 25–30 HP variants may share many components with 28HP models, but verify with your exact code before ordering.

Engine Overview

28HP Class 4‑Stroke Outboard (25–30HP Family)

Feature	Description
Configuration	Small-block 4-stroke outboard, typically inline-2 (some platforms use inline-3); carbureted or EFI depending on year/platform.
Common Models	28HP 4-stroke variants within the broader 25–30HP family; verify by model code/serial for exact parts fit.
Advantages	Quiet operation, strong mid‑range torque, improved fuel economy vs. comparable 2‑strokes.
Notes	Cooling system wear items (impeller) and corrosion protection (anodes) are routine service points. Many parts are shared with 25/30HP siblings, but always confirm by model/serial.

Routine Maintenance & Service Parts

Intervals below are general guidelines for typical recreational use. Always follow the official service manual for your exact model, operating conditions, and storage environment.

Item	Interval*	Remarks	Parts Link
Engine oil & filter (4‑Stroke)	100 hours or annually	Warm engine, drain completely; replace crush washer if applicable. Use marine‑grade 4‑stroke oil of the specified viscosity.	Oil Filters
Gear oil (lower unit)	100 hours or annually	Inspect magnet and fluid for metal or water intrusion; replace seals if contamination is found.	Lower Unit Seal Kits
Spark plugs	100 hours (inspect at 50 hours)	Check gap and color; replace if fouled, worn, or corroded.	Spark Plugs
Fuel filter / water‑separating filter	100 hours or annually	Drain/replace; ethanol‑blended fuels may require more frequent service.	Fuel Filters
Water pump impeller / kit	Every 2 seasons or 200 hours (inspect annually)	Critical for cooling; replace sooner if overheat or weak tell‑tale occurs.	Water Pump Impeller Rebuild Kits
Anodes (sacrificial)	Inspect every 50 hours; replace when 50% consumed	Choose alloy for your water (zinc for salt, aluminum for brackish/salt, magnesium for fresh).	Anodes

Frequently Used Parts Categories

Routine Service: Service & Maintenance Kits
Cooling System: Water Pump Impeller Rebuild Kits
Fuel System: Fuel Filters
Ignition / Electrical: Electrical Items
Gearcase & Seals: Lower Unit Seal Kits
Propulsion: Propellers and Propeller Guards
Corrosion Protection: Anodes

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale stream or overheat alarm	Inspect intake screens for debris; confirm hose routing; evaluate impeller age/condition.	Water pump impeller kit, thermostat, intake screen
Hard starting / rough idle	Verify fresh fuel; check spark plug condition/gap; inspect/replace fuel filter; look for vacuum leaks.	Spark plugs, fuel filter, primer bulb/hoses
Poor acceleration / power loss	Confirm prop pitch/condition; check for fouled plugs; inspect fuel quality and water separator.	Propeller, spark plugs, fuel filter/water separator
Gearcase noise or milky gear oil	Drain and inspect oil; check for water intrusion; pressure/vacuum test gearcase.	Lower unit seal kit, gear oil, drain/fill gaskets

FAQs

Are parts interchangeable across different years or 25–30HP platforms?

Some wear items (anodes, impellers, plugs) may cross over within the 25–30HP family, but there are year and platform differences. Always confirm with the exact model code and serial number before ordering.

When should I replace the water pump impeller?

As a preventive measure, replace the impeller every two seasons or ~200 hours. Replace immediately if you experience overheat, weak tell‑tale flow, or if the motor ingested sand/silt.

How often should I change lower unit gear oil?

Change every 100 hours or annually. If the oil appears milky or has metal shards, service seals and re‑test before returning to service.

What information do you need to verify part compatibility?

Please provide the model code, serial number, horsepower, shaft length, and any relevant photos of the nameplate and existing part. This ensures we match the correct components.

Ready to find what you need? Browse the main Johnson/Evinrude/OMC collection and filter by horsepower, year, and model to locate compatible parts for your 28HP 4‑stroke.

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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.