I have a McCulloch 2618 cav chain saw and the chain adjusting screw has broken. How do i replace it.

SOURCE: how to adjust carb. settings on a McCulloch Pro Mac 610 chain saw

turn both jets in untill snug (don't force) turn out ccw one full turn. increase by 1/8 turns untill set proper. should be between 1 1/4 and 1 1/2 normally. good luck. be safe.

SOURCE: need owners maual for mcculloch power mac 6 chain saw

try my answer to the post on McCulloch pro/mac 10-10 chainsaw owners manual... posted by denniswick on Oct 03, 2008

SOURCE: need to replace gas line inside mcculloch chain

You need to disassemble the case to get to the fuel tank. Pull out the plug fitting and replace the internals with new factory grade parts.

SOURCE: mcculloch 3516 chain saw, does not always start.

It must have spark, fuel and compression to run. Your task is to figure out which is missing.
Sometimes electrical components quit operating once beyond a certain temperature. Does it always start cold and become tempermental when warm?
IMO most hard start problems on a chainsaw with a good fuel delivery system are flooded.
Start Procedure
Cold:

1. Ignition on/off to on
2. Set compression release – optional step even if saw is equipped with a compression release
3. Pull (close) choke, set fast idle (done when choke closed on some saws); pull starter and listen for an attempt to start. once heard (usually two pulls; no more than 4)
4. Set compression release – optional step even if saw is equipped with a compression release
5. Push (open) choke pull starter until it starts. (usually first pull)

1. Ignition on/off to on
2. Set compression release – optional step even if saw is equipped with a compression release
3. Pull (close) choke, set fast idle (done when choke closed on some saws) - Don’t pull with choke closed.
4. Push (open) choke, pull starter until it starts. (usually first pull)

SOURCE: I have a husqvarna 435 chain saw and need to

There is a special tool required, the part no is 530035560 available from Husqvarna/Jonsered dealers, as posted earlier this should be a dealer adjustment as the machine is new.