i posted on this problem a couple of days ago and followed advice but still have the same problem. i replaced the coils, new plugs gapped at .030 cleaned points, with emery cloth, gapped at .020 , replaced plug wires , stranded copper wire type. have contnuity between points when closed and no continuity when open. grounded plugs to head and have spark when cranking. when cranking with starter about about every 2 to 3 secounds there in the same old backfire thru the exhaust and no start. i have cleaned out the fuel bowl, i removed the plugs and cranked it with full choke until fuel came out of carb. under butterfly. ran a compression check and both cylinders were at 95 psi. compression held steady and did not drop. i have ordered a service manual for this model but dont know if it will have any trouble shooting about this problem. if someone has had this problem and located the problem please let me know. i also rotated the flywheel by hand and with my finger on the plug opening i could feel the pressure and then the sucton which tells me that the suction reeds are working. is there any timing on this unit. please advise thanks . john PS. also the plug wires are in the same location as when it was running a couple of years ago so they are not crossed. sorry for the long post
