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Technical
Dellorto 36 idle mixture screw not working?
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<blockquote data-quote="Trikky2" data-source="post: 245885" data-attributes="member: 240"><p>Ah - interesting - I hadnt seen those heads before. Thanks.</p><p></p><p>The plug being more sooty would indicate the mixture is too rich. If this wont adjust out using the screw then you will have to check the idle jet itself. Either its too big or it might simply be loose in the carb body. </p><p></p><p>If the idle jet checks out ok then the next suspect would be float level - if its too high, due to incorrect adjustment or leaking needle valve (due to a fault or excessive fuel pressure) then the excess fuel will dribble out and overflow into the engine. A small amount of seepage like this will not be noticeable when the throttle is opened up a bit - like when your driving - but at tickover it will run way too rich and will negate your efforts to set the mixture screw.</p></blockquote><p></p>
[QUOTE="Trikky2, post: 245885, member: 240"] Ah - interesting - I hadnt seen those heads before. Thanks. The plug being more sooty would indicate the mixture is too rich. If this wont adjust out using the screw then you will have to check the idle jet itself. Either its too big or it might simply be loose in the carb body. If the idle jet checks out ok then the next suspect would be float level - if its too high, due to incorrect adjustment or leaking needle valve (due to a fault or excessive fuel pressure) then the excess fuel will dribble out and overflow into the engine. A small amount of seepage like this will not be noticeable when the throttle is opened up a bit - like when your driving - but at tickover it will run way too rich and will negate your efforts to set the mixture screw. [/QUOTE]
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Dellorto 36 idle mixture screw not working?
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