Carburettor setting on McCulloch Power Mac 340 Chainsaw?

Question

Carburettor setting on McCullocj Power Mac 340 chainsaw.
I have acquired a Power Mac 340, it won't start, but sparks and fuel in cylinder, maybe too much. The spark plug looks like it hasn't ever been running, so maybe wrong plug, what's the right plug and gap ?
On the carb there are 3 screws, Hi, Lo and Idle. Can anyone tell me how to set these 3 screw settings correctly to get the saw running ?
As I said, I've taken the plug out, it sparks against the body, fuel in cylinder, brand new plug, won't start, doesn't even sound like it's trying.
Thanks
Peter

Answer 1

Ok first the plug gap is around .030". Next you have to have compression. With the sparkplug in you should be able to feel the "hard" spots while pulling the starter rope. The rope should not just pull out smoothly. Now for the carburetor. Start by screwing the hi and lo jets in as far as they will go. Gently screw them in, don't force them or you will damage the needle and seat. Now turn them out 11/2 turns each. The idle speed will be adjusted later. Make sure that the fuel is fresh and has the right amount of oil in it. Now start it up and let it warm up. You may have to use the throttle to keep it running. Adust the idle screw so that it will run on it's own. Now adjust the lo jet until you get the highest rpm, adjust the idle to keep it at a good idle. Now adjust the hi jet, you do this at full throttle until you get the hight rpm. Let it idle, now open the throttle, if it hesitates turn the lo jet out about 1/8-1/4 turns and try it again.

Answer 2

Mcculloch Power Mac 320

Answer 3

Mcculloch Power Mac 6

Answer 4

Yes, it might be right

Answer 5

your best bet is to take it somewhere and have it done professionally.