Weeping Solexes

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Ronald Sieber
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Weeping Solexes

#1 Post by Ronald Sieber » Tue Jan 23, 2018 5:52 pm

Both my 57 356A and my 69 912 have 912 engines in them with Twin Solexes (40 PII-4s). Both engines weep a mite at the base of the carbs where there is a visible brass plug, as well as weep at the inspection hole for the float level adjustment. They leave a light brown stain around the leaking areas.

This leakage may not be a major problem. It does not look to be a potentially flammable condition, as these are small amounts, but they probably contribute to the gas odor that I detect whenever I go in the garage. One set I had rebuilt by a vendor that we use in the club about 5000 miles ago. Both sets of carbs are not high mileage units, are kept in good running condition, but both exhibit the same weeping.

Is this a common problem with these units? Do others have this same condition? Is there something that I need to fix, or am I worrying a bit too much?

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Phil Planck
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Joined: Wed Mar 26, 2008 7:21 pm
Location: NE Michigan, lower penn.

Re: Weeping Solexes

#2 Post by Phil Planck » Tue Jan 23, 2018 7:31 pm

I would install new washers. Call 356 carb rescue for good ones.
Should not weep/ leak.
Phil Planck

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Jim Kaufmann
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Joined: Tue Apr 08, 2008 10:08 pm

Re: Weeping Solexes

#3 Post by Jim Kaufmann » Fri Jan 26, 2018 12:17 pm

The float level is too high in the bowl. A simple test, if that's the problem, is turn the float adjustment screw 'in' 1/2 turn. Try to clean the carbs up where you see fuel leaking, then take for a few rides being sure the engine gets hot. Still leaking? If this helps clear things up with the fuel leakage, go a step further. Best to get a float gauge on the carbs and set top of the meniscus to the bottom line of the P78 gauge. This is where we set up carbs before shipping them out to customers and got the best feedback.

Not on this chat line a lot, to busy restoring carbs, call the shop if you need further help.

Jim Kaufmann
356 Carburetor Rescue LLC

Dan Epperly
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Re: Weeping Solexes

#4 Post by Dan Epperly » Fri Jan 26, 2018 3:24 pm

I'm usually the one weeping when something is wrong with my Solexes.

DaveErickson
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Location: Monterey, CA

Re: Weeping Solexes

#5 Post by DaveErickson » Tue Jan 30, 2018 2:20 am

Ronald Sieber wrote:Both my 57 356A and my 69 912 have 912 engines in them with Twin Solexes (40 PII-4s). Both engines weep a mite at the base of the carbs where there is a visible brass plug, as well as weep at the inspection hole for the float level adjustment. They leave a light brown stain around the leaking areas.

This leakage may not be a major problem. It does not look to be a potentially flammable condition, as these are small amounts, but they probably contribute to the gas odor that I detect whenever I go in the garage. One set I had rebuilt by a vendor that we use in the club about 5000 miles ago. Both sets of carbs are not high mileage units, are kept in good running condition, but both exhibit the same weeping.

Is this a common problem with these units? Do others have this same condition? Is there something that I need to fix, or am I worrying a bit too much?

Opinions?
The leaks at the float level inspection hole indicates a poor seal with the sealing washer, usually aluminum. You could try tightening the plugs or replacing the washer. It is normal for the fuel in the float bowl to splash around a bit when cornering or driving, but the inspection hole seals should not leak. I have some extra sealing washers, let me know if you would like me to mail you a pair.

The small brass discs at the bottom of the carb sometimes leak. I have seen carbs come in to the shop where someone has painted some kind of sealer around the plugs, but unless the discs are loose I wouldn't worry about it. If the discs are loose they can be re-staked around the edges.

-Dave

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