CrufflerJJ
ArboristSite Operative
I'm playing around with my Husqvarna 136LE ("low emissions") saw. While using it a couple weeks ago to chop down some honeysuckle, it had obvious air leak symptoms (racing, failure to idle without stalling).
I found a leaking crankshaft bearing seal, and am replacing that. I swapped out the original carb for an empty shell version, and plan to rebuild the carb just for grins.
This saw's cylinder uses a "Insulator - Heat", which seems to be a stamped sheet metal insert that goes into the exhaust port of the cylinder. It's part #27 in the attached picture.
Two questions:
1) WHY does the saw need some sort of heat insulator? None of my other Huskies have them. Yes, I know this is basically a rebadged Poulan, but it just seems odd that they added another oddball part to this saw. It's already got an aluminum muffler backplate/heat shield, along with a muffler gasket.
2) Do you see any problem with removing the heat insulator so that I might port the saw a bit so as to enhance its mighty engine? Yes, I know it's like polishing a turd, but such is life!
I found a leaking crankshaft bearing seal, and am replacing that. I swapped out the original carb for an empty shell version, and plan to rebuild the carb just for grins.
This saw's cylinder uses a "Insulator - Heat", which seems to be a stamped sheet metal insert that goes into the exhaust port of the cylinder. It's part #27 in the attached picture.
Two questions:
1) WHY does the saw need some sort of heat insulator? None of my other Huskies have them. Yes, I know this is basically a rebadged Poulan, but it just seems odd that they added another oddball part to this saw. It's already got an aluminum muffler backplate/heat shield, along with a muffler gasket.
2) Do you see any problem with removing the heat insulator so that I might port the saw a bit so as to enhance its mighty engine? Yes, I know it's like polishing a turd, but such is life!