I'm working on a 2800 now and it has all the signs of a bad air leak. I vac and pressure tested the saw and it holds both as well as any saw I've tested. The only components that I think might be suspect are the carb and I have another I will try. The other is the seal between the plate and the boot. I made a new gasket for the carb to plate. I didn't leave the plate in when I tested it for leaks. Anyone have issues with that area? I have a 285 that works well and is basically the same saw but with a chrome cylinder bore.
Any thoughts?
Yes I have had issues with leaks there at the boot to plate area. Mostly on the boots on the 380/330 type saws that used a boot with a bigger hole in it which leaves the flange smaller against the carb studs.
I have seen them cracked there before and found you don't want to tighten the carb stud nuts too tight, just snug them up.
I just found I have a abundance of the NLA boots for the 2800 type.
I also found a new NLA tank assy for this series of saws also. This one is the later one with the large boot hole, carb studs come in from the back and used the vent in the side of the tank. My PP365 had this type on it as it was a type III saw and it also works for the 3750 , 380, 330 etc.