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petcock leaking

Engine, Fuel and Exhaust

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Old Oct 12th, 2010, 10:02 PM     #1
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petcock leaking

I have 2000 flstc that is leaking fuel from the stock vacuum petcock. It only seems to do it when I first start it or turn it off. I took it apart and inspected it but found no obvious problems. And it doesn't seem to do it all the time. Also there is a small hole machined in the final cover, does it go up or down when installed? I think it may be an air hole but I am not sure.

Thank in advance.
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Old Oct 13th, 2010, 12:53 AM     #2
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Re: petcock leaking

Quote: Originally Posted by tjeffrockinr View Post
I have 2000 flstc that is leaking fuel from the stock vacuum petcock. It only seems to do it when I first start it or turn it off. I took it apart and inspected it but found no obvious problems. And it doesn't seem to do it all the time. Also there is a small hole machined in the final cover, does it go up or down when installed? I think it may be an air hole but I am not sure.

Thank in advance.
Personally, I do not like the vacuum operated petcocks. I would replace it with a Pingel manual petcock (see here Power-Flo™ Fuel Valves). Cut off and plug the vacuum line near the nipple on the manifold. I would suggest replacing the vacuum line with some new hose.

JMHO.

TQ
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Old Oct 17th, 2010, 09:07 AM     #3
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Re: petcock leaking

Quote: Originally Posted by TQuentin1 View Post
Personally, I do not like the vacuum operated petcocks. I would replace it with a Pingel manual petcock (see here Power-Flo™ Fuel Valves). Cut off and plug the vacuum line near the nipple on the manifold. I would suggest replacing the vacuum line with some new hose.

JMHO.

TQ
This is good advice! ^^^

I was working on my Bud's 96 FXSTC and it started leaking and was getting worse every time I used it. Harley doesn't make a rebuild kit for it and if it was my bike I would have went with Pingle because you can buy parts and rebuild them. I put a Drag Specialties on his (his money). The hole goes down I believe.
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Old Oct 17th, 2010, 01:31 PM     #4
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Re: petcock leaking

T Q has you covered here, The MOCO petcock was poor @ nest IMO
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Old Oct 19th, 2010, 10:48 PM     #5
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Re: petcock leaking

Thanks for the info guys. I think I will try the pingel valve.
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Old Oct 20th, 2010, 12:20 AM     #6
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Re: petcock leaking

Pingel valves are a very good choice, but personally I like vacuum operated valve shutoff, manual off, prime and reserve position. EFI has made the multi-position prime, "obsolete" but I am old fashioned. I also like the auto safety shutoff if vacuum is off...it allows you to walk away knowing fuel is pinched off.
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Last edited by NEWHD74FAN; Oct 20th, 2010 at 12:30 AM.
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