"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?

Yes. But only when the insulator was already cracked (on installation).

Any damage by running on 3 cyclinders for about an hour?

As long as the internal parts of the plug stayed intact, no.


--
-Netsock

"It's just about going fast...that's all..."
http://home.insight.rr.com/cgreen/