HawaiiOutboard Repair

Mobile outboard services on O‘ahu

Professional outboard diagnostics, repair and maintenance at your boat, anywhere on the island: marinas, harbors, moorings, boat ramps, private docks and driveways. No towing, no shop wait, no travel fee.

Filling an outboard with fresh engine oil during a service

Yearly service, 100-hour service and break-in

Routine maintenance keeps your engine reliable in Hawaiʻi's warm salt water. We follow the engine maker's schedule and factory procedures, and quote every service in writing before we start.

  • Yearly service, every 200 hours or 1 year. Our standard, because every engine here runs in salt water. The water pump impeller is replaced every time.
  • 100-hour service where the maker calls for it, for engines that run a lot.
  • First (break-in) service on a new engine, usually at 10 to 20 hours.
  • 300-hour and larger services: timing belts, valve clearance and other long-interval items when due.

A four-stroke service includes engine oil and filter. Every service includes gear case oil with new plug gaskets and the checks and parts the maker calls for at that interval. Not sure which service is due? Your engine hours tell us. See the engine service guides for your model's schedule.

Laptop diagnostics on a boat in an Oʻahu harbor

Diagnostics and troubleshooting

Proper diagnosis is the foundation of every repair. We find the root cause before recommending repairs or replacing parts, and we use the factory diagnostic software where the engine supports it.

  • No start or hard start
  • Rough idle or stalling
  • Loss of power
  • Warning alarms and fault codes
  • Overheating
  • Electrical and charging problems
  • Fuel delivery and bad fuel
  • Trim, tilt and steering problems

A diagnostic visit is $300 and includes up to 1.5 hours at the boat. If the fix is simple, we usually do it right then. Otherwise you get a written quote, and nothing more is done until you approve it.

V6 outboard powerhead during a repair

Outboard repairs

After a diagnosis, or when we find something during a service, we send a quote for the repairs. You approve all of it or just the parts you want.

  • Water pumps and thermostats
  • Lower unit seals and gaskets, pressure and vacuum tested
  • Ignition: plugs, coils, wiring
  • Power trim and tilt
  • Hydraulic steering flush and bleed
  • Propeller removal and shaft grease
  • Gaskets, seals and thread repair
  • Tune-ups

Parts usually take about a week to reach Hawaiʻi. When parts are needed, the usual pattern is a visit to diagnose, then we order parts, then a return visit to fit them.

Outboard carburetors taken apart for a rebuild

Carburetors, injectors and fuel

Fuel problems are the most common cause of rough running in Hawaiʻi, where boats sit in humid air with ethanol fuel. We clean and rebuild carburetors in an ultrasonic cleaner, clean and flow test fuel injectors, synchronize carburetors, and replace fuel lines, primer bulbs, filters and water separators.

Why an outboard loses power

Checking ignition coil wiring on an outboard

Electrical and charging systems

Electrical problems are common in marine environments and need proper testing to avoid replacing good parts. We test starting and charging systems, batteries and cables, find corroded connections, and troubleshoot sensors and faults. We also trace boat electrical problems such as no power to the console, gauges, pumps or radio.

Compression test on an outboard

Used outboard engine reports

Whether you are buying or selling, a full diagnostic report tells the real story: total hours, the hour breakdown by RPM, overheating and low oil pressure events, and stored fault codes, plus compression, lower unit oil and a corrosion check.

What to check before buying a used outboard

Outboard engine at our shop

Shop drop-off for loose engines

Boats are always serviced where they are kept. An outboard that is off the boat (a spare, a kicker or an engine you are selling) can be dropped off at our shop. We text you the drop-off time and place, check it in with photos, and text you when it is ready to pick up.

Outboards we service

All makes: Yamaha, Mercury, Suzuki, Honda, Evinrude and Johnson, Tohatsu, and others. Two-stroke and four-stroke, carbureted and EFI, older mechanical engines and modern computer-controlled outboards, single and multi-engine boats. If it is an outboard, we can diagnose it.

What we do not service

Inboard and sterndrive engines, personal watercraft (jet skis) and trailers. If you are not sure whether your job fits, send a request and ask.

Get your engine on the schedule

Tell us the engine, where the boat is and what it needs. We reply with a quote and book the visit by text.