13
« on: October 30, 2009, 01:59:32 PM »
Thanks for the ideas.
1. The piston, rings and cylinder are new. It runs fine when it has fuel available. I don't really suspect compression, but it's easy enough to check.
2. I will check the vacuum on the crankcase next. Pull the muffler and seal the exhaust port. Pull the carb off and snake a tube through the reed valve. If that holds vacuum, then all is good. If it fails, pull the reed valve and check again. That makes sense. If the crankcase is leaking, nothing else will much matter.
3. Vacuum applied manually to the petcock valve does in fact release gas to the carb.
Tim