Petcock Replacement?

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May 25, 2011 | 12:32 PM

#11

tas_todd

Stellar HDF Member

Joined: Jan 2009

Posts: 2,884

Likes: 912

From: South La.

I just went through this exact issue, mine was the float valve. Make sure the seat for it is clean and clear also.

May 25, 2011 | 12:34 PM

#12

tas_todd

Stellar HDF Member

Joined: Jan 2009

Posts: 2,884

Likes: 912

From: South La.

Mine did the exact thing, it was the float needle. $11 and it was fixed.

Last edited by tas_todd; May 25, 2011 at 12:38 PM.

May 26, 2011 | 06:02 AM

#13

Doug S

Road Master

Joined: Apr 2009

Posts: 1,123

Likes: 43

From: NJ

I bought an nos petcock that an indy had hanging on his wall for what looked like many years. The rubber gasket lasted about a month and then started to turn to jello. He gave me a replacement and told me that with the newer gas the gasket needs to be made from something called Viton.

FYI: no word on the ig-mod yet, sorry to hang you up..

D

May 26, 2011 | 10:27 AM

#14

Dr.Hess

Seasoned HDF Member

Joined: Aug 2007

Posts: 8,196

Likes: 3,086

From: NW AR

It's also possible that bits of gasket and/or fuel line are wedged in your needle valve, holding it open. You might just need to clean it out after you replace the gasket or petcock.

May 26, 2011 | 04:23 PM

#15

bucaman

Thread Starter

Cruiser

Joined: Jun 2008

Posts: 200

Likes: 39

From: Assonet MA

I opened up the original petcock and took a look at gasket behind the lever. I found a small tear/burr. Not completely torn through so that appears to be why it was an on again off again thing. I suspect I will find the same condition on the new one.

Doug, Thanks for the heads up on the IGM.

May 27, 2011 | 06:46 PM

#16

chop66

Intermediate

Joined: Dec 2009

Posts: 35

Likes: 0

From: Route 66 Az

I just replaced my petcock, having the same issues as you. Went with the j&p, works great and a good price too, $14 bucks or so.

If you dont think it is the float , and its the stock carb you probably have the fuel inlet fitting is bad(because it has a plastic elbow) Mine had a hairline crack, harley replacement elbows(all brass) are $13 and in stock at your local dealer, easy to fix.

May 27, 2011 | 08:46 PM

#17

Fernf5

Intermediate

Joined: Oct 2010

Posts: 41

Likes: 0

From: Washington state

Thought I'd add my 2 cents. I've been having problems with gas dribbling out of my S&S Super B for a little while. Took the carb off and was working on it thinking it needed a new float valve or float adjustment and had the end of the gas line placed into a container and the petcock shut off. To my surprise the next day there was a few oz. of gas in the container. The petcock wasn't shutting off all the way. It was the original 1986 FLST OEM petcock so I replaced it and the float valve....no more leaks. I think I had 2 problems 'cause the valve had a wear ring.

I had one of the aftermarket "Accelobowl" AC pumps too ( don't think you can buy these anymore?)and I suspected there was a problem with it, (turns out no problem) so I pulled it and put a stock S&S bowl on it while I was at it.
I have an S&S "E" on order so if anyone wants the Super B and AcceloBowl shoot me a PM. I'll let it go cheap. Real cheap. I could really feel the difference between the stock bowl and the AC pump bowl. Flat spot rolling on throttle.....that's why I'm upgrading to the "E".

Last edited by Fernf5; May 28, 2011 at 06:36 PM.

Jun 4, 2011 | 10:25 AM

#18

Hackd

Elite HDF Member

Joined: Oct 2005

Posts: 3,872

Likes: 83

From: Canton, Michigan

Pingel petcocks.

If you're carb is dumping fuel out the overflow, you've got a float needle issue. My son's Sporty had this problem and all it took was a new needle. The old needle valve had corroded, possibly due to water in the gasoline.

Last edited by Hackd; Jun 4, 2011 at 10:27 AM.