Engine stalling

Ok here is what I am having problems with.I have an 84 Evnirude 150XP. When I get ready to run, sometimes I have to go back to the primer bulb and squeeze it becuase the engine won't start. After I do that it will start. Then sometimes when I am starting to run and giving more throttle I will almost be ready to plain and then the engine stalls , but doesn't die just remains running. But this only happens maybe 2-3 times a day on the water. I have been told I have an air leak in my fuel lines somewhere but I have replaced 80% of them all ready and the others were good. I have checked all connections to make sure they are tight. I have replaced the fuel filter, primer,bulb, & recently just gave it a tune up so I know I have strong spark. Another thing I was told was maybe a VRO pump going out but why would it do it only 2-3 times instead of all day. And when I am running I have no problmes and have lots of power. Need all the help I can get.

Re: Engine stalling

Sounds like a leak to me. Make sure carb parts have not come loose. Does it leak excess gas/oil into water when it boggs? Could be float/needle setting.

Re: Engine stalling

I agree with Big Al. Sounds like an air leak. You could try replacing the carb gaskets.<br /><br />Good luck

Re: Engine stalling

That is what all the local shops have told me but I replaced all fuel lines and about 6 months ago had the carbs rebuilt and it ran fine up until I replaced the resert check valves under the carbs. Maybe I should replace the gaskets where the carbs meet the manifold??? Yesterday I put some clear PVC hose inplace of the fuel line from the primer bulb to the engine to see if I was getting air bubbles in my fuel but I didn't. I did notice that the fuel wasn't getting moved very much though. But the VRO pump is less the a year old. Can the VRO pump go out on the fuel side and not the oil side? Why the intermittent problem??

Re: Engine stalling

Do you have a gas/water seperator? If so, pull the filter to see how much water is in it. if you don't have a seperator, get one. Pull a plug or two to see if there are any water droplets inside the plug. Last time out mine acted like yours and when I pulled the filter, it was 7/8ths full of water. I bought a used boat that sat for a while and am still gettig water from the gas tank.

Re: Engine stalling

Ive had the fuel side of a vro go out on a 1999 50 horse Johnson. At the time the motor was only a year old. I was going along and the motor quit as if it ran out of fuel, no alarms went off, had to pump primer bulb, start motor and run for about 2 or 3 minutes and repeat over again all the back to dock. When I got to the ramp I ran the motor for awhile then finally the no oil alarm went off. vro was replaced under warrenty.My problem was constant once it started.

Re: Engine stalling

I'm not sure what you mean by "resert check valves under carbs". Could you explain?<br /><br />c/6<br /><br />Hooty