Hello Im new to this forum and this is my second post. I know theres info out there but i cant seem to find specific info on what Im asking. I have a Walbro 668 carb and having trouble getting it tuned to run right. I believe my settings are out of whack for the needles including the IDLE. My question is does anyone know what the idle screw setting is supposed to be set at for a baseline start? Im not sure and I keep fudging with it. The engine starts but if I didnt have it off the ground it would take off immediately because its revving so hi. i tried adjusting the idle but its giving weird feedback. If the revs do drop itll cutoff. I tried finding the sweetspot but it seems to only likes crazy hi revs or low then shut off. Its crazy.
If someone can re-educate me on what turns do what on these needles (H, L, Idle) id appreciate it. I forgot which direction turn increases revs and which direction increases air or gas. I had it memorized at one point but im all turned around now. Coupled with that the responses that i get when i try to adjust the needles are not jiving. The engine is revving like crazy and my eardrums are shot.
Idle:??? (Whats a good starting point for the IDLE?)
Hi: 1 5/8
Lo: 1 3/8
Can you give any help\suggestions on this? Any help is greatly appreciated. Hoping to get his thing idling\running right again.
Thx
If someone can re-educate me on what turns do what on these needles (H, L, Idle) id appreciate it. I forgot which direction turn increases revs and which direction increases air or gas. I had it memorized at one point but im all turned around now. Coupled with that the responses that i get when i try to adjust the needles are not jiving. The engine is revving like crazy and my eardrums are shot.
Idle:??? (Whats a good starting point for the IDLE?)
Hi: 1 5/8
Lo: 1 3/8
Can you give any help\suggestions on this? Any help is greatly appreciated. Hoping to get his thing idling\running right again.
Thx