motor and gas

[david76]

ok allu xperts i need some help here i have a evinrude xp 150 vro the vro is notactive anymore i just had the gas tank acid washed on the inside. Now when i am cutting across the lake at a good speed my motor shuts down and my ball sucks dry.Now if i loosen up the hose clamp it goes back to normal pump the ball again and im off and running. So i could really use some help here thanks.

[JohnB]

Anti-siphon valve stuck/clogged or clogged tank vent.
My guess is they loosened some junk up, and it's the anti-siphon valve.

[david76]

so am i suppose to just keep running it or do i go buy a new tank, i hate going across the lake and BAM i lose my fuel.

[JohnB]

Pull the anti-siphon valve out and throw it in the trash. It is a check valve in the bottom of the fuel pickup tube. One thing I know for sure, if that is what it is, it will do it again and again . As long as the fuel line and carbs/efi are higher than the top of the tank, you don't need it.

[david76]

there is no anti siphon and its a carb. engine 1990 model
im thinking of selling the boat and get something smaller i dont know the hull is in such great shape and i just got the transom rebuilt im having a breakdown H E L P!!!!!!

[Bigshrimpin]

Yo . . . Young1 - The problem isn't the motor. The check valve/anti-siphon valve is on your fuel tank . . . NOT on your MOtta. They go to sh1t all the time.

If you don't have a check valve on the tank . . . then your vent (on the TANK) is blocked.

I replaced my check valve with a regular 3/8" brass nipple . . . but the check valve provides you with some level of saftey if you're motor caught fire. Fire will supposedly only burn back to the check valve.