volks-man
Arboristsite.com Spooner
here we go again with the 026.
the background info:
this is an older 026 with old style air filter and tank vent. got new chain, new oiler, new airfilter, and cleaned up moderatly. had the muffler off during cleanup and the cylinder looks great. running on fresh mix of super93 and stihl ultra.
saw starts easily and is runing pretty good but seems to not be revving very high.
using my el-cheapo tach after warming up and making a few cuts i see it is only turning 8500-9000. my manual says 14000 max. i turn the screw slowly and it rises. thing is after i reach 10000-10500 the rpms start to rise by themselves. rpms below this figure seem to hold steady forever. i stop turning the screw and the rpms steadily rise. i turn it back out a little and they continue to rise. the tach got up to just under 14000 before i let off the throttle. thinking it was something i did i start over with the h screw at one turn out. same results but i let it rise hoping it would plateau. 14000 came and went. the tach refreshes uber slow so i really don't know how fast it turned before i stopped.
i suspect air leak and pull filter and cover off. sprayed small amount intake cleaner (the kind for cleaning car/truck throttle bodies and has lube in it.) behind carb and it nearly kills the saw. i spray the throttle shaft on both sides and it seems to do the same thing but i don't really know if it is spraying past to the back of the box.
questions:
if the shaft is leaking, what is the cure?
if the carb is leaking air where it meets the box, what's the cure?
what am i missing?
any help, tips, suggestions appreciated.
the background info:
this is an older 026 with old style air filter and tank vent. got new chain, new oiler, new airfilter, and cleaned up moderatly. had the muffler off during cleanup and the cylinder looks great. running on fresh mix of super93 and stihl ultra.
saw starts easily and is runing pretty good but seems to not be revving very high.
using my el-cheapo tach after warming up and making a few cuts i see it is only turning 8500-9000. my manual says 14000 max. i turn the screw slowly and it rises. thing is after i reach 10000-10500 the rpms start to rise by themselves. rpms below this figure seem to hold steady forever. i stop turning the screw and the rpms steadily rise. i turn it back out a little and they continue to rise. the tach got up to just under 14000 before i let off the throttle. thinking it was something i did i start over with the h screw at one turn out. same results but i let it rise hoping it would plateau. 14000 came and went. the tach refreshes uber slow so i really don't know how fast it turned before i stopped.
i suspect air leak and pull filter and cover off. sprayed small amount intake cleaner (the kind for cleaning car/truck throttle bodies and has lube in it.) behind carb and it nearly kills the saw. i spray the throttle shaft on both sides and it seems to do the same thing but i don't really know if it is spraying past to the back of the box.
questions:
if the shaft is leaking, what is the cure?
if the carb is leaking air where it meets the box, what's the cure?
what am i missing?
any help, tips, suggestions appreciated.