sthil ms170

[littlerob]

i got a ms170 2012 model its got kat the word on the exhaust if you run it more then 15 ins the saw almost melts and for the next 2moins after turning it off it just sits and smokes like its on fire lol

[william127]

Iv got a kat 1 and a non Kat 1, the front of the kat 1 gets a lot hotter, worried me a bit at first, I prefer the older 1.

[hedgesparrow]

what is it with the kat making them run hotter last time i saw flames like this was when i saw a new zealand air force pilot do his trick would flood fuel into engine then fire up after burner with these saws do i need a kettle boil kettle on exaust:biggrin:

[GardenKit]

Kats need to run hot in order to work. They impede the flow of exhaust gas a little, which results in a power loss.

 

A little googling reveals that the pre Kat model produced 1.7hp. whereas the Kat model has lost a little power through the Kat and only produces 1.6hp.

 

I have always prefered to sell the 180 and then the 181 models, they have a 1.3 bar and a little more power (1.8hp)for very little more money.

[geoff]

Am I right in thinking the new 170 is a china made saw? I was after buying one from my dealer, as the last one I had was bombproof, (I gave in away to a relative), & was advised against.

[peatff]

Catalytic converters run at 600° to 1000°C. They must be a pretty robust type of catalyst in a chainsaw because usually oil burning in an engine can destroy the converter or stop it functioning.

[Albe013]

hi hedgesparrow

have you tried a tankful of ordainary 2-stroke mix through it to see if that makes a difference

thanks albert

[hedgesparrow]

going to try tommorow see how it goes but like aspen as when laying hedges the exaust is pointing at stem so get fumes coming back with aspen do not

[Stubby]

Slight de rail but I thinks kats are a load of crap in any engine . As I understand it they cause more pollution in their manufacture than they prevent when in use plus they impair the efficiency of any engine .