The 454 Premium is one of eight Marine Power fuel-injected gasoline inboards. It's based on the heavy-duty GM 7.4L block with four-bolt main bearing caps and comes with a standard two-year warranty.

The Premium uses port fuel injection with sensors for throttle position, rpm, knock, coolant temperature, manifold absolute pressure, and manifold air temperature to compute the correct fuel-to-air ratio for any condition. Included is self-diagnostic programming and overspeed protection, that reduces engine speed if the Electronic Control Module detects overheating, low oil pressure, or other malfunctions. 

This review/article originally appeared in Power & Motoryacht Magazine, February 1995 and is written by Capt. Bob Armstrong. For more great powerboat reviews, visit their website and subscribe at: https://www.powerandmotoryacht.com/uncategorized/subscribe-power-motoryacht