200t problem

[stewmo]

Any ideas on this appreciated:

 

Right at the end of the day on Thursday my 200t start running at max revs, only option was to turn it off.

Started it over again and was the same, if I put the bar into some wood it would slow down and then I could use the throttle bring up again to max revs but as soon as it was through the wood it would again run at max. With chain brake on, there was no let up.

 

Erm

 

Thanks

[Duncansimpson]

Give it a good blow out. Could be a bit of woodchip jamming the throttle

[stewmo]

In the handle?

[spudulike]

Sounds like the throttle may be stuck open or you have one big air leak - possibly the impulse line has come off or the inlet manifold has split.

 

It is also possible that the throttle valve plate has come loose and is jamming open.

 

I think I would remove the carb and give it a good inspection, make sure the throttle valve is shutting fully and not loose, make sure the linkages are not holding the throttle open, make sure the impulse line is still connected to the bottom of the airbox and the inlet manifold is not split.

 

Reassemble and try again. If it is still racing then I would pressure and vacuum test.

 

If you get stuck, PM me

[stewmo]

Thanks

 

Hopefully I'll get some time today to have a go... 😃