Kohler 4ESZ Spark Plug Problem

[steveziv]

I removed the old plugs and observed a spot of hard rubber adhered near the tip of each plug. I installed new NGK plugs and the wire sockets would not snap back on. I tried the old plug in the sockets and they would not snap in. Apparently the rubber socket held the tip snug against the contact and the black "rubber" was some kind of glue that held it all together. Not sure where to go from here?

Stick needle nose pliers in the socket and try to open up the metal contact?
Find a compatible plug with a screw off tip?
Have Marine Max come out and possibly change the wires?

TIA!

 

[Little Ducky]

I do believe all spark plug tips should be able to be removed to expose just the threads.

 

[steveziv]

Update: compatible plugs w/ removable tips were the answer.