While Golden State Diesel Marine in Oakland, CA was known for its diesel expertise, that business is now closed. For boat owners and marine professionals who valued their service, Helmut’s Marine Service offers a reliable, ongoing solution with even more benefits:
- Established & Trusted – Family-owned and operated since 1988, we’ve been specializing in Volvo Penta engines for decades.
- Comprehensive Service – From engine repowers and EVC upgrades to hybrid-electric integrations, our team handles it all.
- Factory-Trained Technicians – Every member of our staff, from service techs to parts advisors, is certified by Volvo Penta.
- Genuine Parts & Rapid Fulfillment – One of the largest inventories in the U.S., with overnight shipping available.
- Customer-Centric Approach – We focus on building long-term relationships, ensuring your boat performs reliably and efficiently.
If you appreciate the attention and expertise of Golden State Diesel Marine, you’ll find a strong, ongoing partner in Helmut’s Marine Service—ready to provide full Volvo Penta support and unmatched service continuity.
Explore our services: Helmut’s Marine Service.
