I tried to search for a solution but the search function on this site isn't working. Saw won't start unless I prime the carb with 1/2 to 1cc of fuel, then it will start on first or second pull and runs fine until it is shut down. This is a low hour saw which has been well maintained but here is the extent of my troubleshooting so far:
Removed, disassembled and cleaned carb - all looks good
Pressure tested fuel and impulse lines, not softened or collapsing
Fuel filter picks up fuel well
Once running, low and high jets are responsive to adjustment
The stop-ground engages and disengages properly
Sinthered tank breather seems clean and clear
Sparkplug clean, gap OK
Air filter is clean, choke valve closes when engaged
Today though, there seems to be pressure in the fuel tank, hissing sound when cap is released. I don't know if this is because of the grief I have put the saw through today or because tank still has old style rubber pressure equalizing valve - could that be a problem or is this normal?
Is the throttle mechanism a common weak point of this saw? The plastic parts in the handle seem kind of cheesy to me and the action is not very responsive because when I switch the carb from full choke to half choke or run, the butterfly hangs up at a near full throttle position (scary) until I double-trigger, then butterfly will close.
I learned what happens when the clutch drum is not positioned properly on the oil pump carrier. One big oily clutch mess!
Sorry for the long post, I would really appreciate any input and suggestions anyone may offer me. I bet this website really comes alive this time of year when us 'backyard lumberjacks' come out of hiding in springtime.
Many Thanks!
Removed, disassembled and cleaned carb - all looks good
Pressure tested fuel and impulse lines, not softened or collapsing
Fuel filter picks up fuel well
Once running, low and high jets are responsive to adjustment
The stop-ground engages and disengages properly
Sinthered tank breather seems clean and clear
Sparkplug clean, gap OK
Air filter is clean, choke valve closes when engaged
Today though, there seems to be pressure in the fuel tank, hissing sound when cap is released. I don't know if this is because of the grief I have put the saw through today or because tank still has old style rubber pressure equalizing valve - could that be a problem or is this normal?
Is the throttle mechanism a common weak point of this saw? The plastic parts in the handle seem kind of cheesy to me and the action is not very responsive because when I switch the carb from full choke to half choke or run, the butterfly hangs up at a near full throttle position (scary) until I double-trigger, then butterfly will close.
I learned what happens when the clutch drum is not positioned properly on the oil pump carrier. One big oily clutch mess!
Sorry for the long post, I would really appreciate any input and suggestions anyone may offer me. I bet this website really comes alive this time of year when us 'backyard lumberjacks' come out of hiding in springtime.
Many Thanks!