So a friend of mine gave me his old go-cart. I dunno why I took it being that im in my 4th year of college and my life is busy busy busy! but I took it and after a mid term yesterday I thought I would tear into it today so here its goes...
its an old 5hp briggs and stratton. the guy before me blew the motor so he put a new cam,lifters, piston, rings, but the dam thing still wouldn't run. When u pull to start it, it back fires through the carb, so I though it might be timing so I rip the motor apart and the crack dot and the cam dot are lined up on TDC.
also
if I cover the carb so the only air getting in is from the crank case it shots a 3 foot flame out the exhaust side and it happens about ever 3-4 pulls
so I have spark, timings right
the only thing I can think of is that its the carb. I know its a pulsa-jet carb so it needs vacum to pump the gas to the needle jet so my thought is that its the diaphram in the fuel pump or maybe the spring in there, I dont know.
any help would be great I searched all over the net and nothing, so I came to my fellow gear heads...