Engine Services2026-05-06T20:00:50-07:00
Outboard motor service on a boat

Engine Services

Marine Engine Repair & Boat Engine Service in Western Washington

Custom Marine Services provides inboard and outboard engine service, diagnostics, repairs, maintenance, rebuilds, and repower support for recreational boats, fishing boats, trailer boats, yachts, and other vessels throughout the Puget Sound region.

Reliable Engine Service for the Way You Use Your Boat

From routine maintenance and diagnostics to inboard repairs, outboard service, rebuilds, and repower support, Custom Marine Services helps keep your boat’s engine dependable, efficient, and ready for the water.

Technician performing outboard motor service on a boat

Outboard Engine Service & Repair

● Outboard maintenance

● Outboard motor diagnostics

● Outboard repair

● Outboard tune-ups

● Oil and filter service

● Lower unit service

● Cooling system checks

● Fuel system service

● Starting and charging system checks

● Performance issue troubleshooting

MerCruiser inboard engine in a boat engine compartment

Inboard & Sterndrive Engine Service

● Inboard engine maintenance

● Sterndrive service

● MerCruiser service

● Volvo Penta service

● Engine diagnostics

● Cooling system service

● Belt, hose, and fluid checks

● Ignition and fuel system troubleshooting

● Drive system inspection

● Pre-season and post-season service

Technician performing outboard engine diagnostics on a boat

Diagnostics, Rebuilds & Repower Support

● Marine engine diagnostics

● Hard-starting issue troubleshooting

● Loss of power diagnosis

● Overheating diagnosis

● Engine performance checks

● Full engine rebuilds

● Repower planning and support

● Pre-purchase mechanical inspections

● Maintenance recommendations

● Service planning for older boats

mercury authorized dealer logo

Looking for expert service and support for your Mercury-powered boat?

Looking for expert service and support for your Mercury-powered boat?

As a Mercury Authorized Dealer, Custom Marine Services provides expert service, diagnostics, support, and repower solutions for Mercury and MerCruiser-powered boats.

repower engine project at Custom Marine Services

Questions About Boat Engine Service?

Get quick answers about marine engine service, diagnostics, repairs, maintenance, rebuilds, and scheduling service with Custom Marine Services.

What engine services do you offer?2026-05-06T16:52:54-07:00

Custom Marine Services provides inboard and outboard engine service for boat owners throughout Western Washington. Services can include diagnostics, maintenance, repairs, tune-ups, rebuilds, repower support, and routine service planning.

Do you service outboard motors?2026-05-06T16:54:38-07:00

Yes. Custom Marine Services services outboard motors for recreational boats, fishing boats, trailer boats, and other vessels. Common outboard services include diagnostics, maintenance, tune-ups, cooling system checks, fuel system service, and repair work.

Do you work on inboard and sterndrive engines?2026-05-06T16:56:35-07:00

Yes. Custom Marine Services provides inboard and sterndrive engine service, including maintenance, diagnostics, repair work, and related system checks. This can include service for MerCruiser and Volvo Penta engines where applicable.

What are signs my boat engine needs service?2026-05-06T16:58:24-07:00

Common signs include hard starting, rough idle, loss of power, overheating, unusual vibration, warning alarms, fuel smell, poor throttle response, or a change in how the boat performs. It is best to schedule service early before a small issue becomes a larger repair.

Do you provide marine engine diagnostics?2026-05-06T17:00:40-07:00

Yes. Marine engine diagnostics can help identify problems with starting, charging, fuel delivery, cooling, ignition, sensors, and overall engine performance. Good diagnostics help avoid guessing and make repair planning more straightforward.

Can you help with a boat repower?2026-05-06T17:02:40-07:00

Yes. Custom Marine Services can help with repower planning and support. A repower may be worth considering when an engine is unreliable, outdated, underpowered, inefficient, or no longer practical to repair.

How do I schedule engine service?2026-05-06T17:04:21-07:00

You can schedule boat engine service by calling Custom Marine Services or filling out the service request form. Include your boat type, engine brand, engine model if available, symptoms you are noticing, and whether the issue is urgent.

Explore Our Other Services

Marine electronics display at a boat helm

Electronics Services

Marine electronics installation, wiring, electrical service, and system upgrades for better performance, safety, and reliability on the water.

Person inspecting a boat propeller during routine boat maintenance

Maintenance Services

Routine boat maintenance, winterization, shrink wrapping, and seasonal service to protect your investment and keep your boat ready.

Boat Upgrades & Other Services

Custom installations, rigging, bottom painting, gel coat repair, and other marine upgrades tailored to how you use your boat.

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