My engine is a 1967 Wisconsin TRA-10D with the Zenith carb. I have tried everything I can think of and I cant get it to fire. Below is a list of things I have tried.
Checked plug---nice blue fire
Cleaned and adjusted points
checked the points timing
compression test---cant do actual test, but I cant hold my thumb over the spark plug hole as it cranks, it blows off.
complete dis-assembly of the carb...all passages are clean, float is adjusted, needle valve is closing
tappet/valve clearance is good
valves are opening and closing.(as are points) so camshaft probably isn't broken.
checked crank case breather
checked throttle/governor/choke linkage
I can crank and crank and crank and it wont fire. Eventually, after a lot of cranking, gas will start to run out of the carb. When I check the plug, it appears dry, I would expect the engine to be flooded, but presence of gas isn't there, so I tried pouring a bit of gas in the spark plug hole, and still nothing. No popping, nothing, just turns and turns.
At this point, I desperately need some help. I don't know where to go next. I really wast to start restoring my new little tractor, but I would like to make sure its gonna run first. Any suggestions are greatly appreciated, Thanks.