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- is it possible to check and change needle settings (to see which notch is used) without complete disassembly? I'm afraid answer is no, but just in case
- on my carb set, after I removed main jets and turned carbs over emulsification tube dropped out just by gravity.. Just on 1st carb. Tube is very loose in rge hole.. Is that ok? No impact on carb function?
- mixture screw - I suppose it changes air flow, correct? So turning in makes mix richer?
Unsure of choke application on this carb set, don't think it lifts throttles as well as making richer?K7 definitely lifts throttles with choke application, manual allows nearly 3000rpm for running on choke so it's quite a bit of throttle applied when set. So fundamentally different from this one in discussion.All the symptoms seem to agree with your feeling of running rich. The exhaust would smell of fuel too if that's the case.You say that needle clips are in fourth position, is that 4 from top of needle or 4 up from bottom position? Suggestion if not like this, put needle clips in fourth slot from bottom of needle (lowers needle to make leaner) then turn idle air screws out 1/2 turn from where they are.You will need to use throttle while it warms up on this I believe.
Yes on the 550 there is no throttle speed increase mechanism like you normally find on other carbs. I normally use choke open to start and once running close chokes to about half way whilst it warms up. I do NOT need to keep the throttle open though whilst warming up so there is something not right with your setup. Moving the clip will not (I don't think) help as the needle position only starts to have effect at higher revs. That said I run mine in the middle position so you may want to change them ans see if it has any impact.
Quote from: paulbaker1954 on June 24, 2019, 10:28:46 AMYes on the 550 there is no throttle speed increase mechanism like you normally find on other carbs. I normally use choke open to start and once running close chokes to about half way whilst it warms up. I do NOT need to keep the throttle open though whilst warming up so there is something not right with your setup. Moving the clip will not (I don't think) help as the needle position only starts to have effect at higher revs. That said I run mine in the middle position so you may want to change them ans see if it has any impact."I normally use choke open to start and once running close chokes to about half way whilst it warms up" - do I understand you start engine like me, e.g. w/o choke use (= choke open) and then you use it halfway? Or wise versa, meaning you engage choke fully (= flaps are fully closed, so restricting air and making mix richer)? Sorry for such question, I'm not native english speaker