Re: 1995 OMC CObra 5.8 L Sparkplug Removal
I was able to do it on my 5.0 by putting a spark plug socket over the plug and turning the socket with an open end wrench. My spark plug sockets have a hex base at the bottom, yours might too. West marine sells tools to change plugs, i think it comes with a socket wrench, extender, wobble joint, and sockets. I think its a reasonable price too.