When your boat's engine needs attention, you want a shop with the mechanical expertise to diagnose and repair it correctly — not guess. At Hahn Automotive in Santa Rosa, we apply our deep automotive and diesel expertise to marine engine service, helping Sonoma County boat owners get back on the water.
We service inboard gasoline and diesel marine engines, performing tune-ups, cooling system service, fuel system repairs, electrical diagnostics, and engine overhauls. We also service stern drives and assess transmission/gear case issues.
Marine engines face unique challenges — extended periods of inactivity, salt and freshwater exposure, and high-load operation. Regular maintenance is essential, and catching issues before the season starts keeps you on the water when it matters.
Signs You Need Boat Repair
Our Process
Marine Engine Assessment
We evaluate your engine's condition, review service history, and note any symptoms you've observed during operation.
Diagnostic Testing
We perform compression testing, fuel system checks, and ignition system evaluation to identify any underlying issues.
Cooling System Inspection
Marine cooling systems — especially raw water impellers — are critical. We inspect and service these components thoroughly.
Service & Sea Trial Prep
After completing service, we prep your engine for return to the water and verify all systems are ready for operation.
Why Choose Hahn Automotive?
Mechanical Expertise Applied to Marine
Our deep engine and electrical expertise translates directly to marine applications. We solve problems efficiently.
Pre-Season Service
Start the season right. Pre-season tune-up and inspection ensures your boat is ready when you are.
Inboard & Outboard
We service inboard gasoline and diesel engines as well as various stern drive configurations.
Sonoma County Based
We understand that Sonoma County boaters use Lake Sonoma, the Russian River, and beyond. We service for those conditions.