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High-Performance Boat Motors by Hagedorn Racing Engines

high performance inboard boat motor - missouri - hagedorn racing enginesAt Hagedorn Racing Engines, our boat motor program is designed to deliver massive torque, tailored specifically for the unique demands of marine engines.

Boat motors face challenges that typical street engines don’t encounter:

Constant load: From idle to full throttle, boat engines are always under load from being in the water.

  • RPM requirements: Boat motors need to idle below 750 RPM for smooth gear engagement, while typically not exceeding 6,000 RPM due to outdrive limitations.
  • Camshaft design: Valve overlap must be carefully managed to prevent water from being pulled into the engine through the exhaust system.
  • Fuel quality: Many boat owners prefer to run on low-octane pump gas for convenience.


With our extensive experience in building high-torque motors and our custom camshaft design capabilities, Hagedorn Racing Engines has the expertise to create a powerful, reliable boat engine that meets your needs. We build engines that not only push your boat’s performance to the limit but also provide years of trouble-free service.

So, whether you’re ready to refit your weekend warrior with a new power plant or your buddy just left you in his wake, give us a call. We offer high-output 540, 572, or 648 engines, available in blown and non-blown configurations, guaranteed to give your boat the power and sound you’ve been dreaming of.

boat motor builder - inboard- missouri - hagedorn racing engines

Hagedorn Racing Engines gives you the edge!