Marine Service & Support

Count on Hawthorne's Marine Engine Team

Industry-Leading Engines, Engineering, & Service

Hawthorne Cat is proud to offer industry-leading marine engines, engineering expertise, and top-notch service in San Diego and Hawaii. Since 1956 Hawthorne has been here to meet all your Marine Service needs. Our family-owned and operated business is dedicated to ensuring all of your needs are met so that you can continue to improve your corner of the world. Our wide variety of heavy equipment and services is sure to keep you up and running with little downtime. For all of your marine service and support needs, contact us today!


As your authorized Cat Marine Engine Dealer for service and boat engine repair, we offer the following services at our San Diego and Hawaii locations, our on-the-water dock, or through our fleet of mobile field service technicians:

Advanced Electrical Services

Advanced Marine Diagnostics

Advanced Mechanical Repairs

CVA Options

Emission Specialists

Engine Retrofit and Repowers

Engine Surveys

Engine Test Facility (Dyno)

Factory-Trained Marine Technicians

Fully Equipped Field Service Trucks

Marine Engine Rebuilds and Repairs

Marine Fabrication/Welding (guards, mounts, etc.)

Performance Analysis Reviews

Preventative Maintenance

Professional Technical Communicators

Sea Trials

Technician Wireless Dispatch

Worldwide support (backed by the Cat dealer network)


It's critical to ensure you have the spare Cat parts you need to ensure your heavy equipment stays up and running. Hawthorne Cat has a well-stocked inventory of Genuine Cat parts, as well as online Cat parts.

Most Cat Parts in Stock Plus Over 95% Availability within 48 Hours

Professional and Knowledgeable Parts Staff

Order Parts through Parts.Cat.Com, 24/7

Used Caterpillar Parts or Remanufactured Marine Engine Assemblies

S•O•S SM Fluid Analysis for Fuel, Coolant, Oil

Cat Engine Parts in Stock



Hawthorne Cat is your heavy equipment dealer of choice for Hawaii, San Diego, American Samoa, Saipan, and Guam. We offer a wide selection of top-rated new, used, and rental heavy equipment for your needs, whether you're a construction and landscaping business or you own a fishing operation. Our mission is to be your one-stop-shop for all of your heavy machinery needs. We offer Genuine Cat parts, and our field service technicians can come to your location to lend a helping hand. Our power systems will keep you up and running, while our technology services will help you maximize efficiencies and processes. Learn more by contacting one of our Caterpillar dealers today!

Questions? Contact Us


Mike Stumpo
Marine Product Support Sales Representative
858.376.6836 office
858.688.7034 mobile
[email protected]

Amir Mahmoud
Defense Sales Manager
414.530.3114 mobile
[email protected]

Bryan De Wit
Customer Solutions Supervisor
858.674.7092 office
562.201.2579 mobile
[email protected]


Cliff Yuen
Director of Sales and Rentals, Power Division
808.676.0322 office
808.349.7767 mobile
[email protected]


Myver Hecita
Power Systems Rental & Sales Representative
671.649.4241 office
671.898.2740 mobile
[email protected]