UanofCn 4-Stroke 80HP Outboard Marine Engine

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This page is for UanofCn 4-Stroke 80HP outboard engines. Use it to find compatible parts and service information, including maintenance tips, commonly replaced items, and troubleshooting guidance. You can also browse the main UanofCn collection. 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 80HP Model

Locate the nameplate/serial tag on the transom bracket or swivel bracket. The serial number helps confirm the exact parts fit.
Read the full model code and suffix: these often indicate shaft length (e.g., 20/25), control type (tiller vs. remote), and production year or revision.
For 4-stroke models, note whether your engine has electronic fuel injection (EFI) and whether it shares a platform with sibling 75/90/100/115HP models, as many service parts overlap.
Record any emissions or family labels under the cowling; these can help match filters, anodes, and cooling system parts.

Engine Overview

Inline-4 EFI 4-Stroke (typical 75 115 HP family)

Feature	Description
Configuration	Inline-4, 4-stroke, typically EFI. Designed for smooth running, good mid-range torque, and fuel efficiency.
Common Models	80HP 4-stroke models often share components with 75/90/100/115HP siblings (filters, anodes, water pump kits, many ignition/fuel items).
Advantages	Quieter operation than many 2-strokes, improved fuel economy, strong mid-range performance for fishing and general boating.
Notes	Many routine-service items (oil filter, fuel filter, spark plugs, anodes, and some air intake elements) are shared across the family. Always confirm by serial range and model code.

Routine Maintenance & Service Parts

Intervals below are general guidelines for 4-stroke outboards; always follow your official service manual for your exact model and duty cycle.

Item	Interval*	Remarks	Parts Link
Engine oil + filter	100 hours or annually	Use marine-grade FC-W oil; replace filter at each oil change.	Oil Filters
Gear oil (lower unit)	100 hours or annually	Inspect for water intrusion (milky oil). Replace seals if contamination is found.	Lower Unit Seal Kits
Spark plugs	100 hours (inspect at 50)	Check gap and replace if fouled, worn, or corroded.	Spark Plug
Fuel filter / water-separating filter	100 hours or annually	Replace more often with ethanol fuel or contaminated fuel sources.	Fuel Filters
Water pump impeller / kit	Every 2 3 seasons (or 200 hours)	Replace sooner if weak tell-tale, overheat alarms, or sand/silt use.	Water Pump Impeller Rebuild Kits
Anodes (sacrificial)	Inspect each service; replace when 50% consumed	Choose alloy for your water (zinc, aluminum, or magnesium).	Anodes
Air intake element / screen	Inspect 100 hours; replace as needed	Some 80HP 4-strokes include a replaceable intake element; keep it clean for proper airflow.	Air Filters

*Intervals are typical for recreational use; shorten for heavy, commercial, or harsh environments.

Frequently Used Parts Categories

Routine Service Service & Maintenance Kits
Cooling System Water pumps and Impeller kits
Fuel System Fuel Filters and Fuel Pumps
Ignition / Electrical Spark Plug and Sensors
Corrosion Protection Anodes
Gearcase & Sealing Lower Unit Seal Kits
Propulsion Propellers

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell-tale or overheat alarm	Inspect intake screens, tell-tale for blockage, and impeller condition; verify thermostat operation.	Water pump impeller kit, thermostat, intake screen
Poor acceleration or power loss	Check prop for damage/cavitation, fuel quality, clogged fuel filter, and fouled spark plugs.	Propeller, fuel filter, spark plugs, air intake element
Hard starting or rough idle	Verify battery state, primer bulb integrity, air leaks at fuel lines, and injector cleanliness.	Spark plugs, fuel filter, injectors, sensors
Gearcase noise or metal in gear oil	Inspect gear oil for water/metal; check prop shaft for fishing line; pressure test lower unit.	Lower unit seal kit, bearings, propeller shaft seals
High idle or surging	Check for vacuum leaks, dirty throttle body, or failing IAC/idle control components.	Hoses, gaskets, sensors

FAQs

Are parts interchangeable across different years or the 75/80/90/100/115HP platform?

Many service items are shared within this inline-4 4-stroke family, but revisions occur across years and serial ranges. Always verify by serial number and model code before ordering.

When should I replace the impeller?

Inspect annually and replace every 2 3 seasons (or sooner in sandy/silty water). Replace immediately if you see a weak tell-tale stream or overheat warnings.

How often should I change the gear oil?

Every 100 hours or annually, and always before off-season storage. If the oil is milky or contaminated, pressure-test the gearcase and replace seals as needed.

What information helps confirm part compatibility?

Provide the full model code, serial number, horsepower, shaft length, control type (tiller/remote), and any label data from under the cowling. Photos of the nameplate help ensure a precise match.

Ready to find parts by category and service need? Browse our main collections by part type, then filter by your engines horsepower and model details.

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If youre unsure about your model, send us a photo of the nameplate and the part you need and well help verify compatibility.