Hope the pic comes thru ok.... I copied a pic from the Morgan site (the jet). It is third from the bottom, right column in the link (
http://shop.store.yahoo.com/morganonlin ... arts1.html ).
There appears to be some sort of snap ring inside of the similar jet in the unit already, but he snapped it off when he tried to replace it. It has a threaded throat that appears to be 1" maybe 1 1/4", and I am able to lock onto a hex-head and unscrew the center of the jet... but just can't see how to lift the entire aparatus out to replace the jet (with the one in the pic). The two look very much alike and are both the same size. And looking at the one in hand, I see no way for it to lock in place. Is it friction locked ? Looks like it would have to slide straight out and then the replacement shoved in. Kind of like removing the steering wheel off of the steering column in your car, need a special tool to thread into the center and extract the unit.
Again, thanks for whatever advice you can offer.