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Author: Subject: webers idling
scotlad
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posted on 30/9/03 at 04:56 PM Reply With Quote
webers idling

i have a robin hood with a 2litre standard pinto with weber 45s. unfortunately i cant get the engine to idle using the idle screws- i have to partially open the butterflies. i have contacted eurocarb but they say that the idle jets fitted, 55f8 (or something like that- cant remember though i checked 10 mins ago!). any suggestions gratefully received....... o chokes are 35mm btw
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scotlad
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Location Edinburgh
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Building: Built MK Indy Blade, RH 2b Zetec, rebuilding locos

posted on 30/9/03 at 04:58 PM Reply With Quote
and should have also said above that eurocarb say the jets are the correct size.
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Peteff

posted on 30/9/03 at 08:07 PM Reply With Quote
Doesn't the tickover screw open the butterfly by adjusting the stop position on the linkage?. That's what they normally do. I thought the idle adjust screws on the carbs were to alter the idle mixture.

yours, Pete.

[Edited on 30/9/03 by Peteff]





yours, Pete

I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.

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scotlad
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Building: Built MK Indy Blade, RH 2b Zetec, rebuilding locos

posted on 30/9/03 at 09:43 PM Reply With Quote
so its ok to use that screw for idle speed? was given info that you should be able to get the idle mixture correct using the that it should allow the engine to tickover with the butterflies fully shut. o well shall just leave it how it is! thanks for the reply
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Stu16v

posted on 30/9/03 at 10:23 PM Reply With Quote
Peteff is spot on. There should be an idle screw fitted to the body of one carb and acting on the complete linkage, and another adjustable screw that "balances" the carbs, so they open and close together exactly.
What you have to try and avoid is having the throttle screw set to far in (butterflys too far open) as then the carbs will be idling via the progression jets, equally to far closed and there will be a 'flat spot' on light throttle operation.

HTH Stu.





Dont just build it.....make it!

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scotlad
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Building: Built MK Indy Blade, RH 2b Zetec, rebuilding locos

posted on 1/10/03 at 09:00 AM Reply With Quote
Excellent! thanks for clearing that up guys.
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