:wall: I have a husqvarna weed trimmer with a C1Q zama carburetor. It was not running properly. So I bought a zama repair kit. After installing the kit, I cannot get the primer bulb to operate properly. I tried different configurations on the gasket/diaphram positions, but nothing seems to make a difference. It has a new fuel filter. The primer bulb will not pick up the fuel. It goes in and out with little resistance. Although in one configuration it won't expand after pushing it in, so I don't think that is correct. I only tried different positions after it failed to operate.

Its a Briggs Model 31P777 Type 0296-E1. It wont start, backfires though the carb and the starter can barely turn it over. I have adjusted the valves to .005 on both intake and exhaust. The valves seem to be operating correctly in that the movement appears the same although I have not measured them. I have also put in a new plug. I am thinking bad cam. Are there any other tests I should be doing ?? The backfire is very loud and then whitish smoke comes out of the carb and spark plug hole after I remove the plug. The starter turns it over fine with the plug removed. I also checked the flywheel key and it is also fine.