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New EngineLess power Carb problem or prop change necessary

scubaman

Member
"Recently replaced my 5.0LGM 1

"Recently replaced my 5.0LGM 190hp (500A Volvo Duoprop) with a new 5.7L (300hp) Indmar Vortec engine with a holley 4bbl. carb. The result is less power, lower RPM, half the old speed, and failure to start normally afer running. Must be primed and choked every time. I was told by volvo that a prop change wasn't necessary. The lower RPM could be due to fuel delivery and carb problems. The new engine is sick. I thought maybe old fuel initially but all new fuel and same problem. Any ideas would be greatly appreciated. Thanks"
 
"It sounds like your New engin

"It sounds like your New engine was Installed,......
But,....
Not properly Set Up,+ Tuned Properly.......

Maybe the Carb has Carp in it from the original Fuel,..??...
Are the Fuel Filters New,..??
Was the Carb set up for this motor,..??.. or just bolted on,..??..."
 
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