Thanks for your request for information about JBM Industries. We have been producing rubber parts for imported automobiles for 27 years. Ultralight business is something new for us, as there are not many rubber parts on an Ultralight aircraft. We have produced Stainless Steel Exhaust Springs for 10 years now, and my first Quicksilver still has the first set on it. They have never broken or rusted in 900 hours. Most of the local fliers in this area have our stainless exhaust springs, but we have never run an ad for them. I did manage to get this site up on the web: http://www.jbmindustries.com (New URL Address)

JBM Industries also makes the rubber carburetor sockets for 2-stroke engines out of a rubber that will last far longer than the originals. There are two different sockets. Below are photos of how they are made.

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Uncured rubber, which is like tough old bubble gum, is placed in the mold tooling. The mold is placed in a press that has platens electrically heated, it squeezes the rubber and is held closed for 20 min @ 400F until the rubber cures. Mold is removed, opened, and the cured parts are removed. Parts are now "elastic."

Picture shows a socket for 377,447,503 on right. The 582, 618 socket on left has 2 diameters. These fit BING 54 carbs used on Ultralight Aircraft Engines. ( They are difficult to take pictures of because they are black)

Our latest mold makes the rubber cable adjuster covers that prevent water and dirt from entering the carburetor slide. Originals fit too tight and crack in a very short time.

I started making the carb sockets when I noticed that sockets were lasting only a year on my 582. Automobile rubber parts are never replaced that often. I don't think people would tolerate the yearly replacement of ball joint or drive shaft boots and I knew that JBM could produce the part in a much longer-lasting material.

The Original 503-447 sockets that are stamped "ROTAX" seem to last a long time and can go 5 years easily, so I don't think the problem is so great there, but the sockets now sold for the 582 are terrible, and there is a market for sure.

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As you can see from the socket cut in half, the JBM socket has the "mechanical locking rib" to prevent the carbs being thrown. A taper to the rubber is to prevent "drooping carbs." Rubber is the same durometer as original, but good for temps to F 300.

Rubber doesn't go bad that fast on your car does it? Sockets should last 5 or 10 years easily. JBM has been molding rubber parts for automobiles for 27 years.

Stainless Exhaust Springs were made after I saw many enthusiasts that had broken exhaust springs made of spring steel. Rust causes nitrogen embrittlement and makes them break for no reason. JBM copied the ROTAX spring, 2.5 inch between the hooks, in stainless steel.

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If you are interested in Emailing Mr. Don James for more information, you can contact Don HERE! (New Email Address)