was searching for information on converting a 365 to a 372 carb and ran across this post.
I have two 365's from the 01 model year. These were purchased new by the company I used to work for and I bought them (the pair for 400) when they were one year old. One is a regular 365 and the other is a 365 special
The special was an 01' model and the regular was an 00' even though they were purchased at the same time.
The Special has the side chain adjuster, where as the regular has the traditional adjuster in behind the dawg on the case.
The Special has a semi transparent gas tank, whereas the regular has the regular orange non see-thru tank.
The special has a little differant angle on the front handle.
They both have the ZAMA carbs, the special is a S3M and the regular is a C3M
I was talking with my dealer and he said te 365;s are notorious for the off idle hesitation. This is from lack of fuel at the idle and midrange.
I modded the special, thinking it was better as some say it is a closed port cylinder vs open. The hesitation problem got worse, but if you ease into it, it runs very good, considerably better than stock. I upgrade the modded saw to the 372 HD air filter setup and saw no improvement in the hesitation.
I checked the numbers on the cylinder and both saws have the same part numbers, so that leads me to believe they are open port vs closed.
This may have changed in the 02 or later model years, but this is how mine are, and they have never been touched by anyone else.
The fix for the off idle hesitation seems to be to swap in a 371/372 carb. I am heading to a used parts guy right now to swap one.