I have a 95 Blackhawk with a 502 CI, 415 HP, EFI Mercruiser engine. I ran the boat last weekend for the first time since last September when it ran great, but this last weekend I could not get the engine to increase above 3,000 RPM's. Other than the reduced RPM's, the boat ran great. Also, I used a fuel stablizer when I let the boat sit since last September. Any ideas what the problem would be?
Steve