Diesel Engines & Running Gear

We Are Propulsion System Experts

Yacht-HQ specializes in maintaining and repairing the critical components of your vessel’s propulsion system – diesel engines, marine gears, shafts, struts, rudders, trim tabs, thrusters, and props. These components are the lifeblood of your yacht. Proper maintenance ensures smooth, safe, and reliable operation on the water.

We provide the full range of mobile dockside AND boatyard services:

  • Diesel Engine/Generator Repair & Maintenance
  • Hydraulic and Manual Steering Service
  • Cutless Bearing Replacement & Engine Alignment
  • Sail Drive Service, Repair, & Replacement
  • Fuel System Cleaning & Maintenance
  • Trim Tabs & Bow/Stern Thrusters
  • Complete Re-Power Projects
Thomas Bourque
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S/V Pau Hana
"Yacht-HQ repowered our Catana 431 catamaran with Beta Marine 38's in June of 2025. Working with Yacht-HQ was easy, they are true professionals and overcame all the issues that came up during the new engine install... We are extremely satisfied with the Beta Marine engines and Yacht-HQ. We highly recommend Yacht-HQ!"
Mac Ernest
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M/V Saving Grace
"We have been using Graham and Yacht-HQ for several years with sail and power boats and have always received exceptional service and high quality work. Graham and team bring a high level of professionalism and extensive experience to boating repairs and we have used them for multiple boat systems. Whether they are repairing or replacing parts, they always deliver. They are the best!"
Dave Wessels
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S/V Bubbles
"We had the pleasure of working with Graham on a yacht lithium battery upgrade. Very professional and knowledgeable. He and his team do very good work with no compromise on quality. I absolutely recommend them."
Jonathon Addison
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S/V Bon Vivant
"I’ve been using Yacht HQ to refit and maintain my 42’ catamaran for the last two and a half years and I am very happy with their work. I’m glad I found them."
Jeff Roth
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S/V Calypso
"A very talented and multifaceted yacht service company. I was very happy with the service and price."
Kevin Stinnette
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S/V Serendipity
"Yacht HQ has managed most every aspect of the installation of our solar system aboard Serendipity... Graham and his HQ crew have maintained our engines, nav systems and AC units. There is nothing having to do with the boat that I wouldn’t trust them with. The boat is beautiful and we get compliments on it frequently."
Edward Janeway
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S/V Bluebird
"Graham at Yacht-HQ is a great resource for boaters. I am a sailor with an older Catalina 42. He deals with Power Yachts and Catamarans as well. He did a complete Raymarine electronics install for me... Also completed was a ton of much required and neglected engine maintenance. Quality was A+, Price was fair with very good billing including hourly description and all parts. I would highly recommend Yacht-HQ for all your yachting needs."

Diesel Engine & Generator Services

Regular engine maintenance is essential for longevity, reliability, and performance. Our services include:

  • Oil/Filter Changes & Impeller/Zinc Replacement
  • Engine Cooling System Inspection & Service
  • Fuel System Inspection, Cleaning, & Maintenance
  • Motor Mount Replacement & Engine Alignment
  • Fuel Injection Evaluation & Reconditioning
  • Turbo & Blower Testing & Repairs
  • Engine Compression & Leak Down Testing
  • Alternator & Starter Diagnostics & Repairs
Schedule Now!

Direct Drive Running Gear

Your yacht's running gear (propellers, shafts, struts, cutless bearings, and shaft seals) requires regular care to maintain peak performance... even when there is no obvious indication of an issue. Our services include:

  • Shaft Seal Service & Replacement
  • Cutless Bearing & Zinc Replacement
  • Shaft Log & Strut Alignment
  • Fitting, Facing,& Lapping Prop Shafts & Couplers
  • Dynamic Propeller & Shaft Balancing
  • Bonding System Repair & Corrosion Mitigation
Schedule Now!

Sail Drive Maintenance & Repair

Properly maintained Sail Drives operate more efficiently - which translates into improved fuel economy and a smoother, quieter ride. Our services include:

  • Lower Unit Service, Seals, and Oil
  • Feathering/Folding Prop Reconditioning
  • Sail Drive Mounts & Shift Linkage
  • Sail Drive Skirt/Seal Replacement
  • Complete Sail Drive Replacement
  • Bonding System Repair & Corrosion Mitigation
Schedule Now!

Rudders & Trim Tabs

Inspecting and maintaining rudders and trim tabs is an important part of every visit to the boatyard. Any "play" or "binding" in these areas should be investigated and corrected. Our services include:

  • Rudder Shaft Packing/Seals & Bearings
  • Trim Tab Repair & Replacement
  • Rudder/Keel Alignment
  • Trim Tab Pumps, Cylinders, & Controls
  • Bonding System Repair & Corrosion Mitigation
Schedule Now!

Maximize Your Yacht's Performance

Trust Yacht-HQ to handle all aspects of diesel engine and running gear maintenance, ensuring your yacht remains in top condition.

Schedule a FREE On-Board Consultation

We will come to you!