Hey guys, got a little problem with my briggs 3.5hp.model# 92502 type:3196 It will not start unless I prime it with some gas through the carb. It has one of those automatic chokes without the primer bulb.
Changed the diaphram,.Compression is 60 -62 not bad I figures with a MCR.The fuel pipe is clear and I'm after cleaning the carb twice and blowing it out with air.Air mixture is set at little pass 1 1/2 turns out.Valves are lapped and clearance is set to .005 intake /.007 exhaust I can't figure why the fuel is not being sucked up with the choke closed but it will start with a prime.Would, not preloading the diaphram do it because thats about the only thing I can think of that I didn't do other than changing the o ring in the intake on the carb. What am I over looking?
_________________

well, yeah the diapragm may need replacing if you havn't already?, but those auto chokes, most never started good. also the mixture screw could be damaged. what fuel pipe? the gas line? it may take you a good 4 or 5 pulls to start it without priming if you try it that way.... and of course you could find a used bad engine, with a good newer tank and carb, the newer style plastic ones with the push primer to get rid of the auto choke. and you'll have a primer then.