problem rc nitro

[markbaker]

High guys got a problem with my ansmann virus 21 engine please give it half a throttle and it's hardly moving pushed 13 hole tanks last week running fine .iv just replaced the button and colling head and a new glow plug number 3 and a new tank just don't know what it could be please

 

[TomP]

Check spur gear. It loosened on ya.

 

[ninnon]

Check spur gear, clutch and check that you're not running it really rich.