Stihl fs400 head won't spin

[bikerman]

Hi guys, was using my fs400 today to clear nettles/brambles, then I realised the blade wasn't turning freely. I continued using it for a bit then the blade wouldn't turn at all like it was seized, but it will turn the opposite way when I turn it by hand. Anyone know what the problem is?

cheers

[TurtleWoods72]

Hi guys, was using my fs400 today to clear nettles/brambles, then I realised the blade wasn't turning freely. I continued using it for a bit then the blade wouldn't turn at all like it was seized, but it will turn the opposite way when I turn it by hand. Anyone know what the problem is?

cheers

 

When did you last grease the head/gearbox assembly?

[openspaceman]

When did you last grease the head/gearbox assembly?

 

Modern ones seem to be sealed for life but you can remove the head to put grease in.

 

It is possible the bearing on the clutch output shaft, they are a bit difficult to remove as held in a deep tube by a circlip but bearing is only £2.50, our local dealer replaces the whole clutch casing at 50 quid a time.

 

 

Easy to check by removing head and the shaft should rotate freely if bearing is good.

[harrythecat178]

Clutch spring snapped off and jammed in clutch, very common if clutch drum worn

[bikerman]

Thanks guys, took it apart and realised it was the clutch bearing, got a new one and working sweet again