Jvision
ArboristSite Lurker
Hi there,
Great site, great advice, found everything I've needed so far.
Got an old 038av with magnesium tank and 24" bar. (you guys helped me ID it last year)
Upgraded it to magnum with 52mm pot from Farmertech, and did a muffler mod.
Runs fantastic - strong and fast - using it for cutting dead hardwood trees for firewood. (still need to improve my hand sharpening !)
Developed a problem...
Starts from cold one two three pulls, cough. Choke off, pull and zoom she's running. Cut, cut, cut no problem.
BUT between cuts sometimes there is a bogging down like fuel starvation. Runs fine on wide open, cuts strong, but will stall on idle occasionally. Pull the cord, starts easy again and runs - but might just die or run weak. Jiggle the throttle and it can be made to rev up (60% chance). Replaced the carb with Bing copy - no change.
I suspect leaky crank seals?
Don't have the tools to do a vacuum check or pressure test crankcase and local Stihl shop only likes the new stuff (and modded gear frightens them!)
Currently I have idle screw set high to reduce the problem - past where chain moves.
(BTW on finishing a cut I let throttle go and saw runs down slowly, chain whizzing along for at least 5 secs)
Any advice?
Great site, great advice, found everything I've needed so far.
Got an old 038av with magnesium tank and 24" bar. (you guys helped me ID it last year)
Upgraded it to magnum with 52mm pot from Farmertech, and did a muffler mod.
Runs fantastic - strong and fast - using it for cutting dead hardwood trees for firewood. (still need to improve my hand sharpening !)
Developed a problem...
Starts from cold one two three pulls, cough. Choke off, pull and zoom she's running. Cut, cut, cut no problem.
BUT between cuts sometimes there is a bogging down like fuel starvation. Runs fine on wide open, cuts strong, but will stall on idle occasionally. Pull the cord, starts easy again and runs - but might just die or run weak. Jiggle the throttle and it can be made to rev up (60% chance). Replaced the carb with Bing copy - no change.
I suspect leaky crank seals?
Don't have the tools to do a vacuum check or pressure test crankcase and local Stihl shop only likes the new stuff (and modded gear frightens them!)
Currently I have idle screw set high to reduce the problem - past where chain moves.
(BTW on finishing a cut I let throttle go and saw runs down slowly, chain whizzing along for at least 5 secs)
Any advice?