Those are 8848 but you have to buy a 9 pack.
These may work the same as they look similar and believe I have even used them before.
I have used so many different boots over the years. Some are a bit long and have to be trimmed to fit but those work too...
The red Zenoah boots seem to do it even worse than cheap China knockoffs. More real silicone in the red Zenoah boot probably the reason they are more susceptible to it happening and they are pretty thin just above where the sparkplug tip comes up through the spring with a flat top. The others...
The ends of the brass ramps are slotted so you can add as much up trim as you want in the turns. All K&B 3.5 outboards were raced with this system in them when I started.
One of my boats in 1974 this all wood modified Dumas Hot Stuff had the system installed.
Almost certainly a pin hole in the silicone boot. The spark can only jump so far. Usually where the canopy has smacked the top and the tip of the sparkplug knocked a hole through the boot.
The quality MSD boots are a lot tougher silicone than what the Zenoah red ones are made from. They are...
Velcro right to the underside of the lid. That way all of the antenna is up the tube and no delicate coax around any of the mechanics nor do you have to mess with the antenna and tube because it stays up in the tube when you have the box open. Allows the receiver to be up and out of any water...
The Lords or more specifically the Lords Speedmaster uses are a very soft isolator. If your looking for hard those will not be it. Bruces rubber isolators are probably some of the hardest you will find easily.
Have both new sets in my hand atm and Bruces are much stiffer than the Speedmaster...
It won't hurt the cap orings any as they seem to be fine with petroleum based getting to them. The castor goes through the engine and all it's seals so cap orings should be fine as well. The little soft one at the top seams like silicone but I don't think it is as I have never seen fuel/oil...