Runnin' on three of four

Coming home from a picnic in a local park, the Speedster started missing. When I couldn't stand the sound any longer, I pulled over to the side and had a look. The #2 wire had come loose and I hooked it back up but it didn't feel solid. I got part way home and the miss started again, but I nursed it home. What had apparently happened is that the spark plug screw on tip had backed out of the plug and remained lodged in the spark plug lead. I had never seen this happen before, but I guess it can happen. Anyone else have this experience? Any tips to prevent this? I had replaced the plugs a couple of months ago and thought I had tightened the tips adaquately.
John H.

I just replaced the plugs in mine. I removed the little screw thing on top of the plug as the wires have a big plastic or ceramic hat that slips over the threaded post, and the old plugs didn't have the little screw thing.
I noticed that both carbs had worked loose and when I took them off (I find it much eaiser to change plugs with the carbs out of the way) I noticed the gaskets were blown out. (might explain the high idle and backfiring) I bought some new gasket material and cut new ones out. Then I couldn't find my permitex so I went to get some of that. I hadn't bought any for years and am happy to report that they changed their logo from an airplane crashing into the ocean to something more reassuring. I always thought that was the absolute worst logo I had ever seen; I'm a graphic designer and have noticed (and probably produced) some really bad ones, but permetex was the winner.
ed

Some plug wires have an internal configuration that require the presence of the "nut" on the end of the plug - others do not. Mine need the nut type of fitting on the end of the plugs. The solution to prevent these from coming loose however, is simple, use the highest strength and temperature Loctite.
Richard S

I have noticed that there are different types (colors) of loctite, but have always used the blue. Would this be OK? Also, I'm sure you don't want to insulate the tip from the screw, so do you dab it on the tip or down near the base? Thanks.

Lok-Tite is not necessary; hold the plug in your hand, grip the screwed on tip lightly with pliers, and snug it up. It shouldn't come loose.