This is happening just on muffs, and there is a backfire out of the carb. <br /><br />If I accelerate very slowly then its fine, but if I give it moderate throttle it falls on its face.<br /><br />I replaced the accelerator pump, twice, replaced all fuel filters, bent the accelerator pump arm a bit. <br /><br />Also, if I set the timing to 8 BTDC, it definately does not run right, if barely at all. The way I marked the timing was pulled the #1 plug and turned the motor over by hand till the cylinder is all the way up and with the rotor pointing at the #1 cylinder or close to it. <br /><br />I am pounding my head here! HELP
