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Re: Weber carb problem
Donnie, bit disappointed that the supplier has not got back to me yet. I might chase him up this week, if only to quiz him on why the mixture screw has to be turned clockwise beyond the 'one turn from home' position - probably at the half-turn position, with the spring under the screw-head nearly locked up. This usually means the pilot jet is the wrong size I think. When I spoke to him on this issue originally, he said that it could also be a sympton of air-leaks via manifold etc or zero cam clearances as OHC engines tend to do after big mileages. I am sure I checked this out about a year ago, and all was well in this area.
That stud you referred to is non-adjustable, and is part of the mechanism for increasing/decreasing the revs on the little cam. Very strange design! The one on the Grannie carb did provide some adjustment.
The 2-chokeknob installation is working well, and gives me precise control on the engine. With the manual-choke conversion I fitted to the Grannie carb, I remember that it was always a nuisance gettting the revs to die down a few minutes after starting. Had to keep jabbing the acceleratot pedal to get the ratchet cam of the carb to release the screw. Not good early morning living in a quiet cul-de-sac!
One problem that has come back is the running-on when the engine is turned off. Drat it! As a double check, I'll remove the plumbing and the expensive anti-run valve, and make sure there is no c**p partly blocking this area.
Cheers
Mike
Donnie, bit disappointed that the supplier has not got back to me yet. I might chase him up this week, if only to quiz him on why the mixture screw has to be turned clockwise beyond the 'one turn from home' position - probably at the half-turn position, with the spring under the screw-head nearly locked up. This usually means the pilot jet is the wrong size I think. When I spoke to him on this issue originally, he said that it could also be a sympton of air-leaks via manifold etc or zero cam clearances as OHC engines tend to do after big mileages. I am sure I checked this out about a year ago, and all was well in this area.
That stud you referred to is non-adjustable, and is part of the mechanism for increasing/decreasing the revs on the little cam. Very strange design! The one on the Grannie carb did provide some adjustment.
The 2-chokeknob installation is working well, and gives me precise control on the engine. With the manual-choke conversion I fitted to the Grannie carb, I remember that it was always a nuisance gettting the revs to die down a few minutes after starting. Had to keep jabbing the acceleratot pedal to get the ratchet cam of the carb to release the screw. Not good early morning living in a quiet cul-de-sac!
One problem that has come back is the running-on when the engine is turned off. Drat it! As a double check, I'll remove the plumbing and the expensive anti-run valve, and make sure there is no c**p partly blocking this area.
Cheers
Mike
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