Twin Mercury outboard motors on a boat in open water

Mercury & MerCruiser Service in Western Washington

Custom Marine Services is a Mercury Authorized Dealer providing service, diagnostics, maintenance, and repower support for Mercury and MerCruiser-powered boats.

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Authorized Mercury Service Matters

Custom Marine Services is a Mercury Authorized Dealer serving boat owners in Stanwood, Camano Island, Everett, Seattle, Anacortes, and the greater Puget Sound region. Whether you need Mercury outboard service, MerCruiser diagnostics, routine maintenance, or repower support, our goal is to help you get clear answers, dependable work, and the right plan for your boat.

Mercury & MerCruiser Service from an Authorized Dealer

When a Mercury outboard or MerCruiser engine needs attention, the right service approach matters. Custom Marine Services provides Mercury MerCruiser service, diagnostics, maintenance, and repower support for boat owners who want clear answers and dependable work.

As a Mercury Authorized Dealer, Custom Marine Services helps with routine service, troubleshooting, engine performance issues, seasonal maintenance, and planning for Mercury repower projects. The focus is practical: understand the problem, explain the options, and complete the right work for the boat.

For many Western Washington boat owners, that means fewer missed weekends, better reliability, cleaner engine performance, and more confidence before heading out on Puget Sound, the San Juans, local lakes, or coastal water.

Service Built for Mercury-Powered Boats

Boating in Western Washington means saltwater use, seasonal storage, changing weather, long runs, and engines that need to be ready when the forecast opens up.

Engine Diagnostics

Identify alarms, starting problems, performance issues, and engine faults with a proper service approach.

Routine Maintenance

Keep Mercury and MerCruiser engines current with oil service, filters, inspections, and seasonal care.

Mercury Outboard Service

Service support for Mercury outboards on fishing boats, trailer boats, cruisers, and saltwater boats.

MerCruiser Service

Maintenance and troubleshooting for MerCruiser stern drive and inboard-powered boats.

Repower Support

Help plan Mercury repower options when an older engine is tired, unreliable, or no longer worth repairing.

Clear Service Planning

Get practical recommendations before approving work, so you know what your boat needs and why.

Our Mercury Service Process

From diagnostics to final review, we follow a clear process designed to keep Mercury and MerCruiser-powered boats running properly.

● Review your engine model, hours, symptoms, and service history

● Inspect the engine, drive, rigging, controls, and related systems

● Perform Mercury MerCruiser service diagnostics when needed

● Explain findings, service priorities, and repair options clearly

● Complete approved maintenance, repair, or repower-related work

● Review next steps and recommended service intervals with you

MerCruiser inboard engine in a boat engine compartment

Is Your Engine Due for Service?

Mercury and MerCruiser engines need the right attention before small issues turn into missed time on the water.

● Hard starting, rough idle, or poor acceleration

● Engine alarms, fault codes, or warning lights

● Loss of power, overheating, or fuel-related issues

● Regular maintenance for Mercury outboards and MerCruiser engines

● Seasonal service before storage or spring launch

● Repower planning for older or unreliable marine engines

Aerial view of a motor yacht cruising through deep blue open water

Locations We Service

Custom Marine Services works with boat owners across Western Washington and the greater Puget Sound region.

● Stanwood and Camano Island

● Everett and Marysville

● Edmonds and Mukilteo

● Seattle and the Eastside

● Anacortes and La Conner

● Greater Puget Sound communities

repower engine project at Custom Marine Services

Questions About Mercury & MerCruiser Service?

Have questions about Mercury outboard service, MerCruiser diagnostics, maintenance, or repower support? Here are quick answers to help you understand when to schedule service and what to expect from Custom Marine Services.

Do you service Mercury outboards?Josh2026-06-24T00:56:46-07:00

Do you service Mercury outboards?

Yes. Custom Marine Services provides Mercury outboard service for recreational boats, fishing boats, trailer boats, cruisers, and saltwater boats. Service may include diagnostics, routine maintenance, troubleshooting, seasonal work, and repair support depending on the engine, symptoms, and service history.

Do you service MerCruiser engines?Josh2026-06-24T00:58:32-07:00

Do you service MerCruiser engines?

Yes. Custom Marine Services provides MerCruiser service for boats powered by MerCruiser stern drive and inboard systems. That can include maintenance, diagnostics, troubleshooting, drive-related concerns, cooling issues, starting problems, performance complaints, and service planning for boats used throughout Western Washington.

What does Mercury MerCruiser diagnostics include?Josh2026-06-24T01:00:03-07:00

What does Mercury MerCruiser diagnostics include?

Mercury MerCruiser diagnostics may include reviewing engine symptoms, checking alarms or fault codes, inspecting related systems, and looking at common causes of poor performance. The goal is to find the source of the issue before recommending repair work, maintenance, or additional testing.

When should I schedule Mercury engine maintenance?Josh2026-06-24T01:01:45-07:00

When should I schedule Mercury engine maintenance?

Mercury and MerCruiser engines should be serviced on a regular schedule and before long periods of storage or heavy seasonal use. If your boat is hard to start, losing power, overheating, running rough, or showing warning alarms, it is a good time to schedule service.

Can Custom Marine Services help with a Mercury repower?Josh2026-06-24T01:03:34-07:00

Can Custom Marine Services help with a Mercury repower?

Yes. Custom Marine Services can help with Mercury repower planning when an older engine is unreliable, underpowered, expensive to repair, or no longer a good fit for how you use the boat. Repower recommendations depend on the boat, engine setup, controls, rigging, and performance goals.

What areas do you serve for Mercury service?Josh2026-06-24T01:05:27-07:00

What areas do you serve for Mercury service?

Custom Marine Services is based in Stanwood, WA and works with boat owners across Western Washington and the greater Puget Sound region, including Camano Island, Everett, Marysville, Anacortes, La Conner, Snohomish County, Skagit County, Seattle, and nearby boating communities.

Ready for Mercury or MerCruiser Service?

Custom Marine Services provides Mercury MerCruiser service, diagnostics, maintenance, and repower support for boat owners across Stanwood and Western Washington.

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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.

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Technician servicing an outboard motor during boat engine service

Engine Services

Inboard and outboard engine service, repairs, rebuilds, and routine maintenance to help keep your boat dependable on the water.

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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.

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      EXCELLENT  
   Based on 21 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Suzanne C 
 
 
 
 Trustindex verifies that the original source of the review is Google. We launch out of Edmonds, and this June, we found a new marine engine service team in Custom Marine Services. It was really easy to contact Travis (in Stanwood) and get an estimate and quickly schedule service so we could get out and get our fishing and crabbing on! Our Yamaha engines are running like champs.
  
 
      Posted on Google  
   
   Tim Niebruegge 
 
 
 
 Trustindex verifies that the original source of the review is Google. Travis and staff at Custom Marine were very easy to work and communicate with. I took my Bayliner 185 in to check out some engine noise and they were able to help diagnose and get a plan in place to fix. They took it a step further and were able to take care of a couple other issues that were going to start to cause some headache all in the same servicing. I will definitely be bringing my boat back for other work in the future and can confidently recommend others doing the same.
  
 
      Posted on Google  
   
   randy allen 
 
 
 
 Trustindex verifies that the original source of the review is Google. Travis was really awesome. Got my motor running within a week little 9.9 Yamaha I would definitely recommend anybody to him.
  
 
      Posted on Google  
   
   Isaac Ripley 
 
 
 
 Trustindex verifies that the original source of the review is Google. Had a great experience with Travis at Custom Marine Services. Professional, easy to work with, and went above and beyond to make sure everything was taken care of. Highly recommend them for any boat service!
  
 
      Posted on Google  
   
   Kevin Stephens 
 
 
 
 Trustindex verifies that the original source of the review is Google. Awesome service. Honest and professional. I will be having all my engine service and repair work done by them.
  
 
      Posted on Google  
   
   Sphere talk With Michelle and Shawn 
 
 
 
 Trustindex verifies that the original source of the review is Google. There’s no I trust with my boat! Travis always helps me winterize and winterize my boat. Check the engine and take care of any repairs needed and always keeps it running smoothly. I highly recommend!
  
 
      Posted on Google  
   
   ROGER THOMPSON 
 
 
 
 Trustindex verifies that the original source of the review is Google. My Yamaha outboard was giving me an alarm when trolling, so I called Travis. He told me what he thought the problem might be, gave me a ballpark and I dropped it off the next day. He called me the following day to tell me it was ready for pickup, emailed me the invoice, (which was very close to the ballpark) and he that he was able to accommodate my schedule by letting me do so on a Saturday. Great communication! Very Friendly! Thank you Travis!
  
 
      Posted on Google  
   
   Atreyu Buscay 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great place. Takes good care of customers boats.
  
 
      Posted on Google  
   
   James Welton 
 
 
 
 Trustindex verifies that the original source of the review is Google. I was referred to Travis at Custom Marine Services by a company that I used for years, who no longer works on Mercruiser engines.  From the moment I spoke with Travis, I could tell he was a master technician. He understood exactly what I was looking to have done to my boat. Meeting him at his shop, I was completely impressed by how clean and organized it was! He went over everything that we discussed and said he would let me know what they find once they dig in. It wasn’t a day and he contacted me with the items that would need to be done. Then the work began. His communication throughout was terrific. Thoughtful and thorough, taking the time to explain it so I could understand. They completed the work quickly and I picked it up in under a week, which seemed very quick to me! While there for pickup, he went over all of the work done and again I was impressed with his attention to details. There are no shortcuts taken here! If you’re looking for an honest, reliable and truly great person to work on your boat, then look no further!  I will be recommending him to everyone I know without hesitation.
  
 
      Posted on Google  
   
   Duncan Milloy 
 
 
 
 Trustindex verifies that the original source of the review is Google. I was at my wit's end trying to find a qualified marine mechanic to re-power my Bayliner 2859. Travis O'Neill was recommended to me. He answered the phone on the first ring and from that moment on he provided outstanding service and got me floating again. He visited my boat at the Port of Edmonds and discussed options with me. We decided to have the exising MerCruiser 7.4L replaced with a new Quicksilver 6.2L engine along with a new transom assembly. Travis hauled the boat to his shop in Stanwood and performed the work there. He did an excellent job. It feels like I have a brand  new boat. Travis combines his technical competence with a friendly, can-do attitude to get the job done. I can recommend him without hesitation.
  
 
  
  
 
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