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Technical
Dellorto 36 idle mixture screw not working?
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<blockquote data-quote="dubdubz" data-source="post: 246502" data-attributes="member: 1072"><p>it can't be the carbs - as they have been swapped over from left to right - the entire thing [ well apart from the throttle arms as they are handed ]</p><p></p><p>it can only really be the gaskets around the bakelite spacer or some weird valve issue - the compressions are all the same and good readings.</p><p></p><p>I basically get the same issue [non responding idle mixture screw - can screw it all the way in and not get the cyl to stumble or drop revs] on a carb that worked fine on the other side, ie the mixture screws operated exactly as expected.</p><p></p><p>I am truly suspecting the bakelite bits - which is why they are coming off in about 10mins. If that doesn't fix it then I am stumped and will probably drop the engine. I suppose the only other slight possibilty is both pushrods got bent? and the valves aren't opening correctly, the actual compression when valves are shut are right, it could be the valves aren't opening to have that cyl as functional as the others.</p><p></p><p>If the gasket removal doesn't fix it then - that is my next port of call - to swap the rockers and check pushrods....</p><p></p><p>exciting isn't it......... :lol:</p></blockquote><p></p>
[QUOTE="dubdubz, post: 246502, member: 1072"] it can't be the carbs - as they have been swapped over from left to right - the entire thing [ well apart from the throttle arms as they are handed ] it can only really be the gaskets around the bakelite spacer or some weird valve issue - the compressions are all the same and good readings. I basically get the same issue [non responding idle mixture screw - can screw it all the way in and not get the cyl to stumble or drop revs] on a carb that worked fine on the other side, ie the mixture screws operated exactly as expected. I am truly suspecting the bakelite bits - which is why they are coming off in about 10mins. If that doesn't fix it then I am stumped and will probably drop the engine. I suppose the only other slight possibilty is both pushrods got bent? and the valves aren't opening correctly, the actual compression when valves are shut are right, it could be the valves aren't opening to have that cyl as functional as the others. If the gasket removal doesn't fix it then - that is my next port of call - to swap the rockers and check pushrods.... exciting isn't it......... :lol: [/QUOTE]
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Dellorto 36 idle mixture screw not working?
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