WHNJ701 4,165 #1 Posted May 25, 2020 yesterday I had one the old tractors out. it's got a briggs 143302 old style updraft. I got it running yesterday and drove it around, later it started again. ran fine yesterday. so today it won't start, has good spark, even spraying choke cleaner, tried a little gas in the plug hole. nothing not even a pop, tried another plug, pulled the head off valves are fine. Share this post Link to post Share on other sites
ZXT 2,401 #2 Posted May 25, 2020 47 minutes ago, jabelman said: yesterday I had one the old tractors out. it's got a briggs 143302 old style updraft. I got it running yesterday and drove it around, later it started again. ran fine yesterday. so today it won't start, has good spark, even spraying choke cleaner, tried a little gas in the plug hole. nothing not even a pop, tried another plug, pulled the head off valves are fine. My vote is going to be the condenser. I've seen engines with spark at the plug when checking but that won't fire under compression. That or the flywheel key is sheared. Share this post Link to post Share on other sites
WHNJ701 4,165 #3 Posted May 25, 2020 5 hours ago, ZXT said: My vote is going to be the condenser. I've seen engines with spark at the plug when checking but that won't fire under compression. That or the flywheel key is sheared. I will pick up a condenser this week, flywheel key is good 1 Share this post Link to post Share on other sites
WHNJ701 4,165 #4 Posted June 9, 2020 turned out it was the flywheel key, it had hairline crack barely could see it. 1 Share this post Link to post Share on other sites
