Honda Marine 4-Stroke 75-150 HP Outboard Engine Parts

(2 products)

This page is for Honda 4-Stroke 75–150 HP outboard engines. Use it to find compatible parts and service information, including maintenance tips, common replacement items, and troubleshooting guidance. You can also browse the main Honda collection. Scroll to the bottom of the page to start browsing parts for this engine, and 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 75–150 HP Model

Locate the nameplate: On most Honda outboards, the model/serial plate is on the transom bracket (typically starboard side) or the swivel bracket. Record the full model code and serial number.
Read the model code and suffix: Examples in this range include BF75/90/100 and BF115/135/150. Suffix letters/numbers indicate shaft length (S/L/X), control type (tiller vs. remote), and series revisions.
Platform clues (4‑Stroke): 75–150 HP models are typically inline‑4 EFI 4‑strokes with differing displacements and gearcases. Prop hubs and rigging components may vary by model/year.
Confirm fitment by serial: Small changes across series updates can affect gaskets, water pump kits, filters, and electrical parts—verify by full model and serial when ordering.

Platform Overview

BF75/90/100 Series (75–100 HP)

Feature	Description
Configuration	Inline‑4 EFI 4‑stroke
Common Models	BF75, BF90 (various series), BF100
Advantages	Strong fuel economy, smooth operation, and broad propeller compatibility
Notes	Verify water pump kit, fuel filter style, and gearcase parts by model suffix and serial; some service items differ between BF75/90 and BF100 series updates.

BF115/135/150 Series (115–150 HP)

Feature	Description
Configuration	Inline‑4 EFI 4‑stroke (larger displacement vs. 75–100 HP)
Common Models	BF115, BF135, BF150
Advantages	Refined NVH, strong mid‑range torque, and wide rigging/prop options
Notes	Controls and harnesses may differ by model year and control system. Confirm thermostat type, anode set, and impeller kit by serial due to mid‑cycle revisions.

Routine Maintenance & Service Parts

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

Item	Interval*	Remarks	Parts Link
Engine oil + filter	First 20 hours, then every 100 hours or annually	Use FC‑W marine oil; replace drain plug washer where applicable	Oil Filters
Gear oil (lower unit)	Every 100 hours or annually	Inspect for water intrusion (milky oil) and metal debris; address seals before further use	Honda Lower Unit Seal Kits
Spark plugs	Inspect every 100 hours; replace 200–300 hours or as needed	Gap and plug type vary by model; replace sooner for heavy trolling or fouling	Spark plug
Fuel filter / water separator	Every 100 hours or each season	Service more often with ethanol fuel or contamination; drain and inspect regularly	Fuel Filters
Water pump impeller / kit	Every 2–3 seasons or 200–300 hours	Replace sooner if tell‑tale weakens, overheating occurs, or after sand/silt operation	Honda Water Pump Repair Kits
Anodes (sacrificial)	Inspect monthly; replace when ~50% consumed	Use the correct alloy for fresh, brackish, or saltwater to protect the gearcase and cooling passages	Anodes

Frequently Used Parts Categories

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

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale or overheat alarm	Inspect intake screens for blockage; verify impeller condition; test thermostat operation	Water pump kit, thermostat, intake screen, anodes
Hard starting or rough idle	Check fuel quality, primer bulb, and filters; inspect spark plugs and plug caps	Fuel filter, spark plugs, ignition leads
Poor acceleration or power loss	Inspect propeller for damage/fouling; confirm throttle opening; look for fuel restriction	Propeller, fuel filter, spark plugs
Gearcase noise or metal in gear oil	Check oil level/condition; inspect for fishing line on prop shaft that may damage seals	Lower unit seal kit, bearings, prop shaft hardware
Charging issues (low or over‑voltage)	Load‑test battery; verify grounds and connectors; inspect rectifier/regulator	Rectifier/regulator, battery cables, connectors

FAQs

Are parts interchangeable between different years or platforms?

Some consumables (plugs, anodes, filters) may be shared within a series, but changes between series revisions and platforms are common. Always verify compatibility by the full model code and serial number.

When should the water pump impeller be replaced?

As preventive maintenance every 2–3 seasons or 200–300 hours. Replace sooner if the tell‑tale weakens, you operate in sand or silt, or any overheat event occurs.

How often should I change the gear oil?

Every 100 hours or annually. If oil appears milky or you find metal debris, resolve seal or internal wear issues before further operation.

What information helps confirm part compatibility?

Provide the full model code, serial number, horsepower, shaft length, and control type (tiller or remote). Photos of the nameplate and the existing part also help ensure an exact match.

Ready to find the right components? Browse the main Honda collection by horsepower, year, and model.

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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.