Hi,

1 and 1 is the standard but I would really need to see how the saw is
behaving before advising how to adjust it further (its a black art).
If the saw won't rev up properly then try opening the low screw 1/4.

You can buy carb gasket kits to replace all the perishable parts -
again, your local friendly repair place should be able to help you
with this.

Alan.

"Dave" wrote in message ...
"Dave" wrote in message
...
How old is it and how much use has it seen? I recently replaced my 15
year
old Sachs-Dolmar 100 (because it got stolen from the shed) and it always
started very easily. In fact, I was so happy with it that I got exactly
the
same one as the replacement (it's badged "Makita", but it's the same
saw).
You are using reasonably fresh petrol and do clean the air filter etc.?
Anyway, if it is buggered, you should have no bother starting a new one:
I've
used a few cheapies belonging to friends and they were all a doddle to
fire
up.
Regards, Jim.


I bought it 2nd hand several years ago but it hasn't done a lot. Fuel is
fresh (perhaps a bit on the oily side of the ideal mixture) and filter is
clean. I'll check the compression at the weekend and consider a strip
down.

Dave S

The compression was good. After a partial strip (without splitting the
crankcase) and rebuild it turned out to be two faults: a slightly perished
fuel pipe and the flap valve in the carb not being in the first flush of
youth.
Until stripping this I hadn't realised how simple but ingenious chainsaw
carbs were, they use the crankcase pressure pulse to operate a small
diaphragm in the base of the carb - this pumps the fuel! I was also
surprised that the magneto didn't use any points.
It now starts (most of the time) and runs well but I keep having to fiddle
with the 2 mixture screws trying to get settings that work hot and cold -
any suggestions?

Dave S