Super Jet Carb back cover leaking - Need advice

[IS0LD0UT]

I am having trouble sealing the fuel intake/output side of the carb (square). This is the non-pump carb of a set of 38s. They were rebuilt this year by a professional so the gasket is fresh, but it was one of the reasons I sent them out to be rebuilt in the first place. They had been sealed fine, till recently.
I have hex socket caps on the screws so I can get good pressure. They are primarily leaking by the filter and the manifold side and corner.

Does anyone have some advice on how to get them to seal? Is there a point when you just need to replace the carbs or have the surfaces milled or something?

 

[IS0LD0UT]

help!

 

[aramis]

you'll have to post a picture of the parts stack up...could just be the wrong gasket or something simple like that.

 

[dta]

I am having trouble sealing the fuel intake/output side of the carb (square). This is the non-pump carb of a set of 38s. They were rebuilt this year by a professional so the gasket is fresh, but it was one of the reasons I sent them out to be rebuilt in the first place. They had been sealed fine, till recently.
I have hex socket caps on the screws so I can get good pressure. They are primarily leaking by the filter and the manifold side and corner.

Does anyone have some advice on how to get them to seal? Is there a point when you just need to replace the carbs or have the surfaces milled or something?

I'm having the same issue. How did you resolve it?

 

[sjetrider]

possible too long of bolts used in them. I know, sounds crazy but look and see.

 

[IS0LD0UT]

I tried sanding it on glass to get it flat. That did not work, so I got a used back cover from @JetManiac.

 

[dta]

possible too long of bolts used in them. I know, sounds crazy but look and see.

Thanks....that's where I'll start. When I tightened them up yesterday, one bolt had a different sized head. PO might have changed it.

Thanks both of you for the replies.

 

[IS0LD0UT]

It may be worth trying some hex socket head bolts also, so you can get it tighter. Mine already had those though.

 

[BruceSki]

Not saying you did this, but as a warning for anyone out there thinking about using them:


Don't use WSM carb parts! They are junk right out of the packaging they come in. Actually the packaging they come in might seal better than the gaskets themselves.

 

[ChadGnarly]

Listen to Bruise ^^^

 

[Octane_114]

Use oem gaskets.. will pay a few bucks more but worth it. Seal with crank seals

 

[dta]

Thanks again. I have the hex head screws, but on the leaky carb, one is larger than all the rest. Need to pull it off to see if it is longer. if not, gaskets will be next, so where's the best place to get OEM ones?

 

[hink320]

Jetmaniac

 

[sjetrider]

I am willing to bet at least one of your bolts are too long.

 

[JetManiac]

Is the back leaking on a carb with fuel pump or on a slave 38 carb?

 

[dta]

Is the back leaking on a carb with fuel pump or on a slave 38 carb?

Carb with a fuel pump.