Outboard Motor Parts & Accessories

(1 products)

This page is dedicated to Honda 4‑Stroke outboard engines across common horsepower ranges (2.3–350 HP). Use it to find compatible parts and service information, including maintenance tips, frequently replaced components, and troubleshooting guidance. You can also browse the main Honda collection for a wider selection. Scroll to the bottom of the 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 Honda Parts

How to Identify Your Honda (2.3–350 HP) Model

Locate the model/serial plate on the transom bracket or swivel bracket. It shows the model code (e.g., BF115) and serial number.
Read suffix letters and numbers to determine shaft length (S/L/X), control type (tiller/remote), and other options. This helps confirm parts compatibility.
4‑Stroke engines have an external oil filter and oil fill; many mid/high‑power models feature EFI. Note whether your engine uses mechanical controls or Honda iST (drive‑by‑wire) on 115–350 HP models.
Model year and serial range matter more than registration year. If unsure, capture a clear photo of the nameplate before ordering.

Platform Overview

Portable (2.3–20 HP)

Feature	Description
Configuration	Single- or twin-cylinder 4‑Stroke; manual or electric start; tiller steer common.
Common Models	BF2.3, BF5, BF8/9.9, BF15/20
Advantages	Lightweight, easy transport, simple maintenance.
Notes	Carbureted on many small models; check shaft length and prop specs before ordering.

Mid-Range Inline (25–100 HP)

Feature	Description
Configuration	Inline-3/Inline-4 4‑Stroke, typically EFI on later models; remote or tiller options.
Common Models	BF25/30, BF40/50, BF60, BF75/90/100
Advantages	Good fuel economy and reliability; broad parts availability.
Notes	Confirm year/serial for filter and anode style changes; prop selection impacts hole shot.

High Power Inline‑4 (115–150 HP)

Feature	Description
Configuration	Inline-4 4‑Stroke EFI; available with mechanical controls or Honda iST electronic controls.
Common Models	BF115, BF140, BF150
Advantages	Strong mid‑range torque, smooth operation, compatible with multi‑engine installs.
Notes	iST systems support multi‑engine and multi‑station control; verify harness and control type before ordering.

High Power V6 (200–250 HP)

Feature	Description
Configuration	V6 4‑Stroke EFI; mechanical or iST electronic controls.
Common Models	BF200, BF225, BF250
Advantages	High output, excellent durability, wide propeller options.
Notes	Confirm gear ratio and prop hub system; service intervals similar across the V6 family.

V8 Flagship (350 HP)

Feature	Description
Configuration	V8 4‑Stroke EFI (BF350); designed for high performance with iST integration.
Common Models	BF350
Advantages	Exceptional acceleration and efficiency for its class.
Notes	Verify electronic control requirements, steering interface, and dual/triple installation details.

Routine Maintenance & Service Parts

Intervals below are general guidelines for Honda 4‑Stroke outboards. Always follow the maintenance schedule in your engine’s official service manual and adjust for heavy or harsh use.

Item	Interval*	Remarks	Parts Link
Engine oil + filter	100 hours or annually	Warm engine before draining; replace crush washer if applicable.	Oil Filters
Gear oil (lower unit)	100 hours or annually	Inspect for water or metal; replace sealing washers and check vent/drain screws.	Honda Lower Unit Seal Kits
Spark plugs	Inspect 100 hours; replace 200–300 hours or as needed	Check gap and condition; replace sooner for extended idling or trolling.	Spark Plugs
Fuel filter / water-separating filter	100 hours or annually	Drain water bowl frequently in humid climates; replace clogged elements.	Fuel Filters
Water pump impeller / kit	200 hours or every 2 seasons	Inspect annually; replace sooner for sandy/silty or shallow use.	Honda Water Pump Repair Kits
Anodes (internal/external)	Inspect every 50 hours; replace when 50% worn	Use the correct alloy for fresh, brackish, or saltwater.	Anodes
General service bundle	Per schedule	Convenient kits for routine maintenance where available.	Service & Maintenance Kits

Frequently Used Parts Categories

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

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale stream / overheat alarm	Inspect intake screens for debris; verify impeller condition; check thermostat.	Water pump repair kit, intake screen, thermostat, anodes.
Hard starting / rough idle	Check fuel quality and primer bulb; inspect plugs; verify idle air/fuel path is clean.	Fuel filter, fuel pump, spark plugs, injector cleaning (EFI) or carb service (small HP).
Poor acceleration / power loss	Confirm prop condition and pitch; look for clogged filters; scan for misfire.	Propeller, fuel filter, ignition components, injectors (EFI).
Gearcase noise / metal in gear oil	Drain and inspect oil; check for water intrusion; evaluate prop shaft seal.	Lower unit seal kit, gear oil service supplies, prop hub components.

FAQs

Are parts interchangeable between different Honda years or platforms?

Many service items are shared within a family (e.g., BF200/225/250), but there are year and serial splits that change filters, anodes, or electrical connectors. Always confirm model code, serial range, and control type before ordering.

When should I replace the water pump impeller?

As a rule of thumb, inspect annually and replace every 200 hours or every two seasons. Replace sooner if you operate in sandy, silty, or weedy water, or if the tell‑tale stream weakens.

How often should I change gear oil?

Change gear oil every 100 hours or annually. If the drained oil appears milky, metallic, or has water, address seal issues before further use.

What information do you need to confirm part compatibility?

Please provide the full model code (e.g., BF150), serial number, shaft length, and whether your engine uses mechanical controls or Honda iST. A photo of the nameplate helps us verify the exact configuration.

Ready to find the right parts? Browse the main Honda collection and filter by horsepower, year, and model to narrow your search.

Shop Honda 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.