Intek valve issue
I have an MTD tractor with a Briggs 14hp Intek OHV on it. Customer gripe is hard starting/only runs on choke. OK, carb problem, right? Wrong. It has almost 100 psi compression, but when you crank it you can hear the air in the carb intake getting sucked in, THEN being blown back out some. It seems that the intake valve isn't closing quickly enough before the compression stroke. On the old L-heads, you just grind the valve, but how do you adjust the valve to close quicker on an OHV? Valves are in spec now.