Hi All,
I ordered wrap around muffler for my OS 120AX. I did't see this in the picture on their web site, but when the muffler showed up, I noticed there is no negative pressure nipple to push air pressure back in to the gass tank. My question is obviously, how do I set up the gas tank with out pushing air pressure back into the tank.

Every glow engine I had so far has a nipple that put pressure back into the gas tank.

Here is a link to the muffler.

http://www.jtecrc.com/oswraparound.htm

Thanks

Have you considered obtaining a threaded nipple at a hobby shop, then drilling and tapping the muffler to accept it?

I suppose I could, I don't uderstand why it would be shipped manufactured this way if its required?

I got a J'tec muffler for my Brison 2.4. Your lucky, I have hours of work to get it ready to install on my engine. Never again.

A muffler may originally be manufactured to fit a gas engine and happen to cross over to a glow engine. Gassers don't need tank pressure so a nipple would not be needed. That could explain the "missing" nipple.

What Pat said about the nipple, I have gotten slim lines the same way, they can be used on too many different engines. Sometimes they come with the nipple and you may or may not want to use it.
I too have the Jtec muffler for my Brison 2.4 and when I got it the muffler hit the linkage or something?? I just phoned them and they sent me A little thicker stand off and it went right on. One phone call and problem solved.
I like there mufflers but there motor mount for the YS 1.40 was so outstanding and A perfect fit I can't see myself using any other brand. I say that now but what will I be saying when the rubbers wear out??

So can I just drill a hol that is smaller the then the thread and literally thead the presure tap right into the muffler??