View Full Version : New EngineLess power Carb problem or prop change necessary

06-06-2007, 11:22 PM
"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"

06-07-2007, 07:02 PM
are u sure u are getting full throttle at the carb?

07-04-2007, 09:21 PM
"It sounds like your New engine was Installed,......
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,..??..."