Engine Stalls Out

[pfichthorn]

I have a 1989 120 Mercruiser that runs for a couple of hours and then stalls out like it is out of gas but it has plenty of gas. We have already had it tuned up, new ignition coil, rebuilt carb, two new fuel filters, blew out the gas vents and fresh gas. After it sits a while, it starts up again like nothing is wrong. Any suggestions

 

[Eric 3.7LX Alpha 1]

Put an inline fuel pressure gauge between the fuel pump and carb and see if you lose pressure when it happens.

 

[Scott Danforth]

I have a 1989 120 Mercruiser that runs for a couple of hours and then stalls out like it is out of gas but it has plenty of gas. We have already had it tuned up, new ignition coil, rebuilt carb, two new fuel filters, blew out the gas vents and fresh gas. After it sits a while, it starts up again like nothing is wrong. Any suggestions

Check your fuel vent and anti-siphon valve

Did you file your points and set dwell?