jim wrote in message ...
Hello,

Just took the boat out and was running fine until i lost major power.
Couldnt go above 3k rpms. Checked the merc 3.0 and saw one spark plug
cable off. So i grabbed it and received a hell of a jolt and noticed the
spark plug had actually broken off clean. Anyone see this happen before?
Any damage by running on 3 cyclinders for about an hour?

TIA!

Doubtful there was any damage. There are always exceptions, but I'd
bet money on everything being internally fine.