help with carbs uggghhhh

[tjtboater]

Hey there , I'm having some problems with my 1986 evinrude xp 150 , a friend of mine rebuilt my carbs and claims to know how to.do so ??? I'm not so sure after trading him some stuff for the work done lol jk , so my problem is he rebuild them and I installed and the bottom carb was just shooting fuel out as I primed the fuel system ... He took them back apart and we found my fuel lines were breaking apart so he took every thing apart again and the first time he didn't mess with the two screws on the plastic housing with the float attached , this time he unscrewed the two outter nuts and removed the inner screws which I believe there called the jets , when he installed them he put both jets in and tightend them up same with all three cars and also made the outer screws tight on the out side I guess those are to prevent air from going into the carbs , now after all this it will not start at all... Any suggestions experts , when I changed all fuel lines and reprimed the fuel back up to the motor I seen a little fuel seeping out the carbs , I thought if the floats are right it shouldn't matter how much u pump it wouldn't let fuel flood the carbs so I should not have nothing seeping /?? But im new at all this and would love to learn. Please help lol also are the two screws inside the side of the plastic float housing the adjusting screws for the air fuel mixture at slow idle and fast idle , or should they be all the way tight ??? also are the self adjusting carbs with fixed jets or is the two inner screws I'm talking about the adjusting screws ???

 

[archcycle]

Re: help with carbs uggghhhh

Those two screws with holes through them are the high speed orifices and they're just fixed size gas inlets. Fuel shooting out when you prime it probably means a float needle issue because the float rises and pins the needle down to prevent more fuel from coming in but without that it just flows thru the system. Fuel seeping out where the body goes together means either they aren't seated well or the gaskets are worn and need replacement. They may have been seated well and just won't ever go back just as they were. That's up to you to decide. If you aren't sure then just buy some rebuild kits.

You should be really concerned about the fuel lines breaking up. If some of that gets into your carbs they can/will clog a jet and your cylinder will run lean or worse without fuel/oil and you'll lose the cylinder. If they're originals then they absolutely all need replacement.