MS 660 Back to the factory, chain brake handle getting hot!

[mendiplogs]

I was using my saw the other day ringing up a horse chestnut (36"Bar) Chain brake worked fine whilst saw still reasonably cold but once hot the plastic became quite pliable. Sent saw back to dealer and It's been recalled for further tests.

 

It's the first case my dealer's heard of.

 

Has anyone else had this problem?

 

Saw was bought In Dec 2011

 

HI JONNY just got it from cutting up large beech butt 30ft long 3/4ft die and your right the chain brake i could smell plastic melting im ringing stihl it a joke the saw thats like tea brakes it just mad im getting a husky i can sit around day and wait for the chain brake to cool down jonny have you got yours fixed now thanks jon

[bobh]

Milling with mine today, chainbrake was really bad, has anyone tried stiffening the handle with a piece of metal or something?

[spudulike]

Does anyone know if this is caused by the exhaust gases being deflected off the timber and back on to the saw - would longer dogs/bucking spikes help?

 

Is it down to the heat retained within the exhaust - making the muffler less restrictive may help - dual port?

 

Or does the exhaust push exhaust gases on to the handle?

 

Once we have this info, a fix can be defined - we have to remember that this is a safety device and any modification may get you in to deep water if there is an accident:thumbdown:

[RDB logs]

Mine is about 5 years old and has been through several handles now, trouble is they go all rubbery and then you carn't get the brake on which is a bit of a pain. Good to know they havnt changed. "But we have never seen it happen before"

[mendiplogs]

Does anyone know if this is caused by the exhaust gases being deflected off the timber and back on to the saw - would longer dogs/bucking spikes help?

 

Is it down to the heat retained within the exhaust - making the muffler less restrictive may help - dual port?

 

Or does the exhaust push exhaust gases on to the handle?

 

Once we have this info, a fix can be defined - we have to remember that this is a safety device and any modification may get you in to deep water if there is an accident:thumbdown:

 

HI STEVE your right mate it the exhaust gas coming back off the wood back on to handle so large dogs spikes will help it and more tea brakes thanks jon

[18 stoner]

Modded can with twin port cures this.

[spudulike]

Modded can with twin port cures this.

 

That was one of my suggestions - probably works by dissipating the exhaust gasses better than a single port!

[Jamespepperpot]

How much are modded twin port exhausts?

[mendiplogs]

How much are modded twin port exhausts?

 

HI JAMES im told by stihl a new exhaust and it will be better thanks jon

[18 stoner]

How much are modded twin port exhausts?

 

Its more a case of if you can get hold of one.

 

Will depend how clued up and helpful your local dealer is, but a good starting point.

 

The other alternative is make or have one made:thumbup1: