Tuning a carby...

[Matt_M]

Hi Guys

I have just revived my obsession with chainsaws (not in a crazy killer way) and bought 4x wrecked saws as parts. I got 2x MS200T, 1x 036, and on Husky 350.
They all had scored cylinders and pistons so I have replaced all faulty parts and got them all running.

My question is this.

How do you know when you have got the carby tuned correctly. I don't want to run them too lean or too rich, but don't really know how to tell when I have got the levels correct.

Has anyone got any tips or suggestions for me ?

Great site and loads of information which is good.

Thanks guys.

Matt

 

[J_Arena]

Here is a thread with some good info........ http://www.arboristsite.com/chainsaw/113538.htm

 

[indiansprings]

Always set the low side first then the high and then set the idle. Either take it to a competent dealer, another chainsaw enthusiast with a tachometer and set the saw with in the mfg's specs. Unless they are an old saw like a Mac 10 or XL-12 your not going to tune them correctly by ear in this day and time. Tachs's save saws period.

 

[Matt_M]

Thanks for the reply. Sorry its taken me 15 years to reply! Been busy - had a kid, put in a new kitchen etc.
Anyway

Finally got myself a tach (TTO).

I have followed the stihl service manual about tuning the carby and all went well till the last point..

" 5. Set engine's max RPM to 14,000 with H screw "

I cannot get anything less then about 14300.

Does this mean carby needs a rebuild, adjustment screw is worn ?

Matt

 

[blsnelling]

Check out the link in my sig.

 

[VinceGU05]

Thanks for the reply. Sorry its taken me 15 years to reply! Been busy - had a kid, put in a new kitchen etc.
Anyway

Finally got myself a tach (TTO).

I have followed the stihl service manual about tuning the carby and all went well till the last point..

" 5. Set engine's max RPM to 14,000 with H screw "

I cannot get anything less then about 14300.

Does this mean carby needs a rebuild, adjustment screw is worn ?

Matt

the limiter tab on the H is stopping you from fattening it up more. got to trim of remove limiter on H so u can CCW it more to bring revs down.