We have a ultralight with 447 Rotax. Please advise What causes engine from idle an to full throttle all of a sudden engine stumbles-but if if gradually engine does fine.
With the air filter off runs perfect. Spews a little gas but from idle to wide open all of a sudden it runs fine
When air filter on it stumbles and does not recoup
Have looked all over online and this seems to be a issue that others are having to but can't figure out a fix
We have changed jets, done it all even brand new carb and same problem
All boots are new.
Would timing be a factor?
With the air filter off runs perfect. Spews a little gas but from idle to wide open all of a sudden it runs fine
When air filter on it stumbles and does not recoup
Have looked all over online and this seems to be a issue that others are having to but can't figure out a fix
We have changed jets, done it all even brand new carb and same problem
All boots are new.
Would timing be a factor?
