Zgotrip Posted March 13, 2010 Share Posted March 13, 2010 One of my 44’s has been leaking, I thought this was coming from the accelerator pump but upon close inspection fuel is actually spraying from what looks like some kind of set pin? Cant find it on any parts list and have no idea how to go at fixing it. Most of these pins have a little purple sealant around them but this one seems to have lost it. Any ideas how to fix this? Quote Link to comment Share on other sites More sharing options...
Sam280Z Posted March 13, 2010 Share Posted March 13, 2010 (edited) That is a plug that is used to plug off drilled passages. In the construction of a carburetor, there are many passages inside the casting that are created by intersecting drilled holes. The holes are then plugged . This is not a normally servicable part, i.e. you don't usually have to fool with them. From your picture, the leaking plug is in a passage that feeds the accelerator pump nozzel. THe purple "sealant" makes me think that someone rebuilt this carb and removed (usually by drilling) the original plugs. I'm holding in my hand a brand new Mikuni that has never even been bolted to a manifold and there is no purple around any of the plugs. You may try to reseat the plug by tapping it in gently with a pin punch or small finishing nail set (it has an indentation on the end). The case may be that the sides of the drilled passage was damaged when the original was removed. If that doesn't work, any shop that does a lot of carb rebuilding should be able to replace it. Sam Edited March 13, 2010 by Sam280Z 1 Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted March 13, 2010 Share Posted March 13, 2010 +1 on Sam's advice. I would also try and clean around the small bearing plug with a sharp awl, then clean with carb cleaner/ compressed air, then maybe a bit of JB Weld... It's not like that's a part that needs to be removed again any time soon. Quote Link to comment Share on other sites More sharing options...
Zgotrip Posted March 14, 2010 Author Share Posted March 14, 2010 Thanks guys, i tried re setting the plug with a few good taps but no luck so i went with the JB weld. So far so good Quote Link to comment Share on other sites More sharing options...
PanzerAce Posted March 18, 2010 Share Posted March 18, 2010 http://www.mediafire.com/?dzttczzgo2m Mikuni manual for any future issues Quote Link to comment Share on other sites More sharing options...
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