Hi all, long time listener, first time poster. I have a 2010 Jred 2159/Husky 359 I bought new that has never transitioned off idle to load/throttle cleanly. Always have had to feather it. Saw is stock, carb is stock Zama C3, saw came with the metal intake boot clamp. It's got to the point where I can hardly get it to rev up off of idle let alone put any load on it. So I take the carb apart, diaphragms look good, no dirt present internally, blow it out, put it back together, fuel & vent lines hold pressure when I blow in them, same issue. Flip on its side, loosen fuel cap, same problem, so I don't believe it's a vacuum problem. I've ran VP C9 (95 octane no ethanol) and Blendzall green label for the saw's life, and prior to knowing it's going to sit for a while, I dump the fuel and let it idle itself dry. FWIW, compression is good & the piston skirts are clean/no signs of a leak & dirt entering. I've been rebuilding two strokes & carburetors & tuning/racing them for 25 years but no experience with the Zama Chinese junk. But I can't find a rebuild kit for this carb either (probably because they're $50 new?). I have it rather rich at idle in an attempt to get some fuel in for it to transition to WOT. If I clean up the idle, it just bogs & stalls as soon as you hit the throttle. High circuit is full rich to the stop & it just zings once it does pick up, put too much load on it and it bogs, too lean.
Any tips/pointers? If it's just toss the carb, are the Walbros "fixed" or do they still need attention? I don't want to buy more Chinese garbage.
Thanks!
Any tips/pointers? If it's just toss the carb, are the Walbros "fixed" or do they still need attention? I don't want to buy more Chinese garbage.
Thanks!