oldlawnguy
Well-Known Member
- Joined
- Jul 6, 2019
- Threads
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- 121
Bought a 2006 Homelite Ranger 16" chainsaw for $40 (looks pretty much new, came with case etc). It has a Walbro WT764-547 carb and kinda would run on idle for a bit.
I've replaced fuel filter, fuel lines & spark plug. Primer bulb is good. Also used a Walbro K20-WAT kit on carb and only replaced gaskets, fuel pump and diaphragm after cleaning out good with carb spray and drying with airgun. Carb did not look that bad at all and diaghpram was not too stiff, but rebuilt anyway.
Pulled out high & low needles and cleaned. Seated needles and then backed both out 1 1/4 turns as a baseline.
Scratching head as I can start with full choke on idle and full choke with full throttle. However, when I try and push in choke even a small bit it just dies. Playing around with needles does not do much.
With full choke and full throttle you can tell the mixture is rich, however any air just causes it to die.
Any trouble shooting tips to try? Walbro Kit came with 2 fuel pumps that matched exactly previous one which was like clear blue plastic.
I first tried the one that was a mesh yellowish plastic, then tried the one that was black similar to the black diaphragm material. Seems to run a little better, but I'm thinking it's something in the carb, just don't know what to try next. I don't think previous owner damaged needles...
Previous owner tried to adjust carb before he sold. That's why I checked high & low needles. Low needle has a more blunt tip than the high which I think is how they are supposed to be.
Could not find any aftermarkets for this carb HM-300939004
Any tips much appreciated.
Thanks!
I've replaced fuel filter, fuel lines & spark plug. Primer bulb is good. Also used a Walbro K20-WAT kit on carb and only replaced gaskets, fuel pump and diaphragm after cleaning out good with carb spray and drying with airgun. Carb did not look that bad at all and diaghpram was not too stiff, but rebuilt anyway.
Pulled out high & low needles and cleaned. Seated needles and then backed both out 1 1/4 turns as a baseline.
Scratching head as I can start with full choke on idle and full choke with full throttle. However, when I try and push in choke even a small bit it just dies. Playing around with needles does not do much.
With full choke and full throttle you can tell the mixture is rich, however any air just causes it to die.
Any trouble shooting tips to try? Walbro Kit came with 2 fuel pumps that matched exactly previous one which was like clear blue plastic.
I first tried the one that was a mesh yellowish plastic, then tried the one that was black similar to the black diaphragm material. Seems to run a little better, but I'm thinking it's something in the carb, just don't know what to try next. I don't think previous owner damaged needles...
Previous owner tried to adjust carb before he sold. That's why I checked high & low needles. Low needle has a more blunt tip than the high which I think is how they are supposed to be.
Could not find any aftermarkets for this carb HM-300939004
Any tips much appreciated.
Thanks!