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Ask Dominick Your Own Question
Dominick, Marine Mechanic
Category: Boat
Satisfied Customers: 1009
Experience:  25 Years Experience as Mechanic, 20 Yrs Boat Yard Owner/Mechanic, Factory Certified
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Motor runs great on muffs in water bogs down on power up

Customer Question

motor runs great on muffs in water bogs down on power up done everything but ing.
JA: Sometimes things that you think will be really complicated end up being easy to fix. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. Tell me a bit more about what's going on so the Marine Mechanic can help you best.
Customer: motor seems to starve on throttle up
JA: Is there anything else important you think the Marine Mechanic should know?
Customer: new carb. plugs timing seems o.k. new gas filters
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Marine Mechanic about your situation and then connect you two.
Submitted: 1 year ago.
Category: Boat
Expert:  Tan replied 1 year ago.

Hello. My name is Tan.

Could I get the engine make, model and serial number please?

Customer: replied 1 year ago.
Volvo penta 3.0 glp-j ser.4012256903 2007
Expert:  Tan replied 1 year ago.

Did you check the fuel filter in the fuel pump and the carburetor?

If yes then we need to run the engine on another fuel source like as gas can.

Customer: replied 1 year ago.
I have done both
Expert:  Tan replied 1 year ago.

Have you run the engine on a different fuel source?

Customer: replied 1 year ago.
Customer: replied 1 year ago.
hit wrong button do not charge for phone service
Expert:  Tan replied 1 year ago.

Ok have you done a drop cylinder test and a compression test? Have you done a fuel pump pressure test?

Drop cylinder test is where you put the engine in gear give it a little rpms and pull each plug wire off at the distributor cap one at a time. It should drop rpms on each cylinder.