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Carb Leaking Gas

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SpacerM

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Nearing the end of my first season with my BJ8, I was under the hood today doing some work, and without me realizing it, the back end of my wrench hooked the choke cable of the front carb right by the jet adjustment screw. When I pulled on the wrench, the choke cable was pulled way out and I heard a bunch of nasty sounds immediately followed by gas running out the bottom of the carbs. I waited until it stopped dripping, reset the choke cable and energized the fuel pump- it still dripped, but only once every 5 seconds or so. So what did I do- did I crack the diaphragm? Is this novice reparable, or should I pull the carbs and send them off? All help appreciated- thanks.
 
Is this novice reparable: Most likely. Sounds like the diaphragm failed if fuel keeps leaking out the bottom of the carb
 
Thanks, Keoke- looks like another "learning project" for me. I will pick up the SU rebuild manual/booklet locally tomorrow to see what I am getting myself into. I'm looking at the Moss catalog now, but don't clearly see the part # I am likely to need- hoping it is not an entire rebuild kit- any suggestions?
 
SpacerM said:
Thanks, Keoke- looks like another "learning project" for me. I will pick up the SU rebuild manual/booklet locally tomorrow to see what I am getting myself into. I'm looking at the Moss catalog now, but don't clearly see the part # I am likely to need- hoping it is not an entire rebuild kit- any suggestions?
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You can buy just the jet/diaphrams separately from the usual sources. You will need to have a jet centering tool set.
 
Thanks, Patrick. Just spent the better part of the evening going through Randy Forbe's pictures, and I now understand what is likely broken and how it seems quite easy to fix- it appears on the HD8's that the jet and the diaphragm are one piece, and that's why I couldn't find the diaphragm listed I the Moss catalog. I'll start the disassembly process tomorrow with an eye to picking up a new jet/diaphragm and the centering tool. Thanks for the insights.
 
SpacerM said:
Thanks, Patrick. Just spent the better part of the evening going through Randy Forbe's pictures, and I now understand what is likely broken and how it seems quite easy to fix- it appears on the HD8's that the jet and the diaphragm are one piece, and that's why I couldn't find the diaphragm listed I the Moss catalog. I'll start the disassembly process tomorrow with an eye to picking up a new jet/diaphragm and the centering tool. Thanks for the insights.
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Take your time doing the carbs the first time around and do not mix parts between the the carbs and use a digital camera to help and you should get through this job with no problems.
 
Once you have them on your bench, you can clean all the dirt, oil and junk out of the areas you can't normally get to.

Then theirs guys like me who seem to have too much time on my hands.
There, they're clean now...lol
 

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AUSMHLY said:
Once you have them on your bench, you can clean all the dirt, oil and junk out of the areas you can't normally get to.

Then theirs guys like me who seem to have too much time on my hands.
There, they're clean now...lol
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How about showing us the details...what you used and the process, etc.
 
Sitting at my bench for a couple weeks doing some wet sanding, and using my dremel and hand drill to polish. Used different grades of polishing rouge. Replaced all the small pieces that I could with stainless (polished them) and chromed some of the larger pieces that are unique to the carbs. All aluminum parts were polished. Good times!
 

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AUSMHLY said:
Once you have them on your bench, you can clean all the dirt, oil and junk out of the areas you can't normally get to.

Then theirs guys like me who seem to have too much time on my hands.
There, they're clean now...lol
Click to expand...
They look great. Did you polish the butterfly's too?(can't tell from the angle they're sitting at). LOL
 
Patrick67BJ8 said:
AUSMHLY said:
Once you have them on your bench, you can clean all the dirt, oil and junk out of the areas you can't normally get to.

Then theirs guys like me who seem to have too much time on my hands.
There, they're clean now...lol
Click to expand...
They look great. Did you polish the butterfly's too?(can't tell from the angle they're sitting at). LOL
Click to expand...

Of course. When you have too much time on your hands, you polish things that will not be seen too...lol. Actually, I just cleaned them then wiped them down with Mothers billet polish for the photo.
 
AUSMHLY said:
Patrick67BJ8 said:
AUSMHLY said:
Once you have them on your bench, you can clean all the dirt, oil and junk out of the areas you can't normally get to.

Then theirs guys like me who seem to have too much time on my hands.
There, they're clean now...lol
Click to expand...
They look great. Did you polish the butterfly's too?(can't tell from the angle they're sitting at). LOL
Click to expand...

Of course. When you have too much time on your hands, you polish things that will not be seen too...lol. Actually, I just cleaned them then wiped them down with Mothers billet polish for the photo.
Click to expand...
"too much time on your hands" must mean "retired"?
 
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