saw won't start unless chainbrake off

[flatyre]

Hey folks I have a couple of little Husky 36's I keep for small dirty work. they're generally bullet proof and can always be relied upon, however one of them started playing up, hard to start and wouldn't run unless started with the trigger pulled. Then it wouldn't start at all and the chord became very hard to pull, it felt like the saw was semi seized. Took it out today and accidentally pulled the chord with the chain brake off. Lo and behold it started no problems, then tried it with the chain brake on and it felt semi seized and wouldn't start. Chain brake on won't start, chain brake off starts easily, then immediately stalls as soon as the chain brake is engaged. Took the clutch casing off but no sign of any problems. Any ideas?

[Guss109]

Check the clutch springs have had the same happen on a ms261

[spudulike]

I think you have found the answers already, take the clutch off, clean it all up, oil the bearing and try again.

 

Sounds like the clutch drum is hindering the crank movement enough for it to stop the saw idling.

[peatff]

You say it starts with the brake off but does the chain run all the time as well ? Mine did that and the oil pump drive had seized to the crank.

[flatyre]

thanks folks, will strip and clean the clutch tomorrow, another symptom I noticed was when adjusting up the chain, after refitting the clutch casing I finger tightened the two bar nuts and tried to tighten up the chain but when I pulled on the chain it was still tight even when loosened off to the point of the chain sagging off the bottom of the bar. The sprocket isn't running freely by the looks of things.

[flatyre]

You say it starts with the brake off but does the chain run all the time as well ? Mine did that and the oil pump drive had seized to the crank.

 

yes the chain spins from the go.

[adw]

As Spud has said the sprocket bearing has seized, remove the clutch and drum, clean and re grease the bearing, replace if damaged.

[miker]

def clutch issues

[flatyre]

i'll try and get the clutch off, and see what the problem is. thanks

[Wendelspanswick]

A few years since I did my tickets but I was told that the only manufacturer that advertised their saws could be started with the chain brake on was Stihl, and that all other manufacturers recommended starting the saw with the brake off?