Only runs while i pedal

Tucson_Toast

New Member
May 9, 2016
8
0
0
Tucson AZ
I have an 80cc grubee that i just replaced the piston on and it will not stay running under its own power. If i pedal it for a while it turns over, even gets up to running temperature but will die as soon as i stop pedalilng. Stuck.
 

crassius

Well-Known Member
Sep 30, 2012
4,032
156
63
USA
I'd take out plug and see if it turns easily - sometimes thing drag if something is mismatched when replaced.

if OK, then I'd check compression and gaskets and seals, then a way too lean fuel flow
 

Kioshk

Active Member
Oct 21, 2012
1,152
7
38
Connecticut
New rings as well? I had a similar problem a while back. Turned out the rings were defective: they had a slight inward bevel that allowed expanding gas to pass over them. A used pair I had laying around completely resolved that heartache.