Hi, M.DMick D wrote:
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Where is your air screw set?
Does your choke slide fully retract? can you raise it further by pulling up on the outer?
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Pilot air screw almost exactly 1.5 turns out ..
Choke slide does fully retract ..
Hi S.SPRIDDLER wrote:
Do you get any response when adjusting the pilot jet? It's primarily the pilot jet (and to a lesser extent the slide cutaway) which supplies fuel at tickover and up to maybe half throttle after which the main jet becomes involved. The pilot screw adjusts the amount of air being supplied, not the fuel. If the engine doesn't show much response to pilot screw adjustment it's likely that the very narrow pilot drillings are obstructed. The 'normal' setting for the pilot screw is about one and a half turns 'out'.
Check, as best you can, the drillings 7, 8 and 9 by forcing aerosol WD40 or brake or carb cleaner through........
It is quite sensitive to the air adjust screw. Any movement affects revs virtually immediately ..
looked for drillings 7 & 8 in the past .. just identified them .. previously thought they were blemishes in casting ..
is thebest way to blow 7 & 8 via drilling 9? can't really see how to get at them otherwise .. have to wait a few days (till first jab has had time to start its magic) to get brake/carb cleaner .. not too fond of WD40 .. tends to leave a sticky residue ..
PS I wonder how accurate that cutaway drawing is .. with my needle in (what I believe is) the centre notch it protrudes slightly above the throttle slide whereas the drawing shows it virtually level .. ?
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Thank you both .. Taid