Consider the carb. vent. I created this problem once when I made a new
gasket. Seems like I forgot one tiny hole (which turned out to be an air
vent allowing equalization of pressure in the bowl). If this vent becomes
clogged, the fuel going out creates a vacuum and shuts it down.
LD

"rcoleman" wrote in message
. com...
Trying to solve a problem from the end of last season. I've got a 91
Johnny
30. Cranks easy, runs up high RPM really fast. Dies.
Any ideas? The weather is getting nice(NC), got the itch.
Thanks