Merc 150 carbed motor Bogs down

[frankie g]

Well, it doesn't happen all the time, but what happens is, I'll be running on plan and she'll start to "starve for gas" ( seems like ) and stall out. My primer ball goes empty and I have a hard time squeezing up the gas. One time I though it could be a vapor lock and opened my gas cap and it worked, The primer ball primed up, the next time it happened, it didn't. I have replaced my Racor twice, thinking it was that ( in a matter of 20 hrs of each other) no water in them, and replaced the in line fuel filter as well. Coming in from a trip yesterday got on plane and after 1/4 ml. or so she started again and I had my cousin hand squeezing the ball while we were running to keep her running and after approx 2 mins. of that all went well. My motor is a 150 Merc. Salt water carbed engine, decarbed, new NGK plugs, racor and in line fuel filter. It's a 2004 with the org. primer ball and gas lines. I haven't noticed any cracks in the line or ball, and I always use Star-Tron with any gas I add, and like I said don't believe it's a water or separation problem. Any suggestions will be appreciated. Thanks.

 

[frankie g]

Re: Merc 150 carbed motor Bogs down

No suggestions?

 

[corm]

Re: Merc 150 carbed motor Bogs down

Hi,

You may want to check you tank vent line. If it has a loop or
a low spot fuel could get up there and starve out the motor.
Also your tank anti syphon valve which is usually
at the top of the pickup tube.

 

[Sandjob]

Re: Merc 150 carbed motor Bogs down

I had same issue with my 225 efi. I suggest looking at your check valve mounted on your tank first. Looks like a 3/8 inch hose barb but usually has a check valve inside. After that replace your fuel lines (especially if they are grey). The new ethanol fuels have been breaking down the inner liner of the old grey stuff.-Use inboard fuel hose(black) to replace. Make sure you keep the new fuel line short as can be. My problem was the grey fuel line-took 4 months to figure out and I boat every weekend year round.

Good luck