Hi guys. New to the forum. I have an issue with my boat, and I hope someone can help. I have noticed my boat losing power at WOT, and my MPH is down from about 58 mph max to about 50 mph max. It idles a little rough, but doesn't miss. Once on plane, it seems fine through the middle of the power band, but when I put the hammer down, it sort of falls flat, doesn't like to rev up, and sort of has a "growling" or "bogging" sound from the motor. It just isn't as crisp sounding anymore. I am pretty convinced it is a carb issue, or fuel issue. Any help is appreciated. Here is what I have, and what I have done:
1996 5.7 2bbl Mercarb,thunderbolt V,Alph one. Mariah 20 ft talari. Prop is a SS 21 Pitch, in good shape. I have replaced plugs, wires, cap, rotor, fuel filter at carb, and seperator. Cleaned pickup in tank,and checked for water in fuel (none). ran 2 tanks of gas, no change. Checked Dist pickup (ok) checked choke for opening when hot (ok). Have not checked base timing. or fuel pressure. Does this sound like a carb issue? Thanks in advance.
1996 5.7 2bbl Mercarb,thunderbolt V,Alph one. Mariah 20 ft talari. Prop is a SS 21 Pitch, in good shape. I have replaced plugs, wires, cap, rotor, fuel filter at carb, and seperator. Cleaned pickup in tank,and checked for water in fuel (none). ran 2 tanks of gas, no change. Checked Dist pickup (ok) checked choke for opening when hot (ok). Have not checked base timing. or fuel pressure. Does this sound like a carb issue? Thanks in advance.