Honda Marine 115-225HP 4-Stroke Outboard Engine Parts

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This page covers Honda 4‑Stroke 115–225HP outboard engines and helps you locate compatible parts and key service information. Below you’ll find maintenance tips, commonly replaced parts, and troubleshooting guidance. You can also browse the main Honda collection any time. To start shopping for parts for this engine family, scroll to the bottom of the page. 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 115–225HP Model

Find the serial/model plate on the transom bracket (usually on the port side) or under the engine cowling. Record the model code and serial number.
Read the model code and suffix: examples include BF115, BF135, BF150, BF200, BF225 followed by letters for shaft length and control type (e.g., L/X for shaft length; A/DA for revision). The suffix can affect parts such as anodes, water pump kits, and electrical components.
Platform distinction: 115/135/150 are typically inline‑4 EFI 4‑strokes; 200/225 are V6 EFI 4‑strokes. V6 cowlings are larger and the engine block has two cylinder banks; inline‑4 has a single vertical bank.
If equipped with electronic controls (iST/Intelligent Shift & Throttle on many 115–225 models), note the control system when selecting rigging parts.

Platform Overview

Inline‑4 EFI Platform (BF115/BF135/BF150)

Feature	Description
Configuration	Inline‑4, EFI, 4‑stroke outboard; multiple shaft lengths and control options.
Common Models	BF115, BF135, BF150 series (various suffix updates).
Advantages	Good fuel economy, broad torque, relatively light weight for the class.
Notes	Water pump kits, anodes, and intake screens may vary by serial range. Some models support iST electronic controls; verify rigging parts accordingly.

V6 EFI Platform (BF200/BF225)

Feature	Description
Configuration	V6, EFI, 4‑stroke outboard; multiple shaft lengths and electronic/remote control options.
Common Models	BF200, BF225 series (various suffix updates).
Advantages	Strong mid‑range and top‑end power with smooth operation; robust gearcase.
Notes	Cooling and anode layouts differ from inline‑4 models. Many V6 models support iST controls; confirm harnesses and helm components to match your control system.

Routine Maintenance & Service Parts

Intervals below are general guidelines for typical recreational use. Always follow your engine’s official service manual and adjust for heavy use or harsh conditions.

Item	Interval*	Remarks	Parts Link
Engine oil & filter	Every 100 hours or annually	Use marine‑grade oil that meets manufacturer specs; replace filter each oil change.	Oil Filters
Gear oil (lower unit)	Every 100 hours or annually	Inspect magnetic drain plug for metal; reseal if water intrusion is found.	Honda Lower Unit Seal Kits
Spark plugs	Inspect 100 hours; replace as needed	Check gap and condition; replace if fouled, worn, or at interval per manual.	Spark Plugs
Fuel filter / water separator	Every 100 hours or annually	Replace more often with poor fuel quality or water contamination.	Fuel Filters
Water pump impeller / kit	200 hours or every 2 seasons	Shorten interval for sandy, silty, or shallow operation.	Honda Water Pump Repair Kits
Anodes (corrosion protection)	Inspect 50–100 hours; replace when ≥50% consumed	Select for your waters (fresh/brackish/salt). Keep clean and secure.	Anodes

*Intervals may vary by model year, usage, and environment; always consult your specific service manual.

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
Corrosion Protection: Anodes
Gearcase / Seals: Honda Lower Unit Seal Kits

Common Symptoms & Quick Checks

Symptom	Check First	Related Parts
Weak tell‑tale stream or overheat alarm	Inspect intake screens for debris; verify water pump impeller condition; check thermostat operation.	Water pump kit, intake screen, thermostat, gaskets
Poor acceleration or loss of top speed	Check prop for damage/cavitation; replace clogged fuel filter; verify spark plug condition and engine reaching rated RPM.	Propeller, fuel filter, spark plugs
Hard starting or rough idle	Confirm battery voltage and connections; prime fuel system; inspect plugs; check for air leaks on fuel lines.	Spark plugs, fuel filter, fuel lines/primer bulb, starter/battery cables
Gearcase noise or metal in gear oil	Drain and inspect gear oil; check drain plug magnets; inspect prop shaft for fishing line and leaking seals.	Lower unit seal kit, bearings, gear lube, prop shaft seals
Electronic shift/throttle (iST) not responding smoothly	Verify battery health and grounds; inspect control harness/connectors; confirm network setup and station configuration.	Control harness, helm control module, shift/throttle actuators

FAQs

Are parts interchangeable between inline‑4 (115–150) and V6 (200–225) models?

Some service items overlap, but many components—cooling parts, anodes, ignition, rigging—are platform‑specific and may change by year and suffix. Always match by full model code and serial range.

When should I replace the water pump impeller?

As a rule of thumb, every 200 hours or two seasons. Reduce the interval if you operate in sandy, silty, or shallow water, or if the tell‑tale weakens or overheat alarms occur.

How often should gear oil be changed?

Typically every 100 hours or annually. Inspect for water intrusion (milky oil) or excessive metal on the drain plug; reseal the gearcase if contamination is found.

What information do you need to confirm part compatibility?

Please provide the full model code, serial number, shaft length, and whether the engine uses mechanical controls or iST electronic controls. Photos of the nameplate and the part to be replaced are very helpful.

Ready to find parts for your Honda 115–225HP 4‑stroke outboard? Browse the main Honda collection and narrow 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.