Hi everyone,
Please, please, please help me on this one!
HS81 once warm bogs down under full throttle.
Sounds like a blocked exhaust/ stuck blades. But only does it after about 10-20 minutes of use.
Tick over is unaffected.
Will be fine again once cool.
So far it has had a new fuel pipe from filter to carb as the old one had a split.
A new tank breather. New spark plug.
Pressure tested and found a leak from the crankcase so that has been resealed.
A needle bearing had failed on the lower gearcase.
When apart I blew through the exhaust and it seemed clear, piston and cylinder looked in good nick.
Any thought and suggestions muchly appreciated.
Please, please, please help me on this one!
HS81 once warm bogs down under full throttle.
Sounds like a blocked exhaust/ stuck blades. But only does it after about 10-20 minutes of use.
Tick over is unaffected.
Will be fine again once cool.
So far it has had a new fuel pipe from filter to carb as the old one had a split.
A new tank breather. New spark plug.
Pressure tested and found a leak from the crankcase so that has been resealed.
A needle bearing had failed on the lower gearcase.
When apart I blew through the exhaust and it seemed clear, piston and cylinder looked in good nick.
Any thought and suggestions muchly appreciated.