Volvo Penta 7.4Gi sputtering

[GeoH]

hi all,
I have a 2000 cobalt 246 with Volvo Penta 7.4 Gi. Ran fine two weeks ago. Started out for boat ride last night...started fine, ideled fine, ran fine for about 1/4 mile then began sputtering. Brought it back in let it sit a few minutes and then tried again...same result. Ran fine for a little bit then started cutting out.

would this be spark plug/distributor/rotary related or would this be fuel filter fuel pump related....or something else entirely
thanks
geo

 

[Scott Danforth]

Check for spark
check for fuel pressure
Check for water in the fuel

 

[alldodge]

What happens when its sputtering if you give or more or less throttle?

 

[GeoH]

Sputters worse with more throttle once it starts sputtering

 

[alldodge]

Sputters worse with more throttle once it starts sputtering

Sounds like its not getting enough fuel. I would check fuel pump pressure. You have two pumps and low and a high pressure. The low pressure keeps the tank full and the high pressure supplies to injectors

Low pressure above the fuel filter
High pressure inside a tank
https://www.marinepartseurope.com/en/volvo-penta-explodedview-7797250-23-10795.aspx

Don't know which Gi you have to determine fuel pressuers

 

[GeoH]

Emptied the fuel filter filled it with gas and put it back on and it ran fine again
thanks