So…hypothetically speaking, at what roundabout temperature should a guy flip the cold weather vent on a Macolmar/Dokita DCS6401/BB? I kind of figured the saw might let me know but a don’t want a problem that causes problems. That question being posed, I suspect that I may be sitting by a fire on a day cold enough where I need to flip that little peace of plastic. I could prolly look it up on the interweb but I figured there is a lot more knowledge right here. Thank you in advance!
From personal experience--when the carb ices up. Will usually happen when working in snow and the intake sucks some in. The plastic plate is a carb heat provision, just like was on all the carbureted car air cleaners.
From the instruction manual for your saw--took about a minute to find:
Working in winter
In order to prevent carburetor icing in conditions of low temperature combined with high humidity, and below + 5°C in order to get up to operating temperature faster, heated air can be taken from the cylinder.
Remove the filter hood (see „Cleaning air filter“)
Remove the insert (10) and insert it as shown in position B for cold-weather operation.
At temperatures above + 5°C the carburetor must NOT be fed heated air. Failure to follow these instructions can lead to damage to the cylinder and piston!
At temperatures over +5°C place the insert in position A for normal operation.
Position A - Normal operation
Position B - Cold-weather operation Reinstall the filter hood.