Yep, an exhaust
leak, loose tappet, and a bad ball bearing could all make the noise
Just took a look at it this morning. I think I found the problem to be the FRESH water
pump on the engine
Cleaned out the locker and jumped in for a look-see. First thing I did was grab the fresh water
pump pulley and try to move it around. And it moves in every direction. It's really loose. Probably has ball bearings as well.
So I took the belt off the raw water pump
anyway and started the engine
, of course the sound was still there. I let it run only about a minute, it made the noise
immediately. No doubt the pump is bad. I'm going to take the alternator
belt off also and start the engine again to verify. I'm sure the noise will go away but even if it is a tappet or exhaust
leak this pump must be replaced.
Of course I had to suspect something about the grounding was related to this, since it occurred just after that incident. But in hindsight I recall
tightening the alternator
belt last month because it had the classic slipping after start up thing. It was a new looking belt and loose, so I snugged it up but not over tight. I actually checked the book for the tension measurement.
Apparently the pump had enough wear that more tension and running hard to get off the sandbar finished it off.
Now I start looking for a replacement. Or to check if it can be rebuilt by me.
If anyone knows the best source for a fresh water pump for a 3GM30F let me know. By best source I mean a good price
for a broke ass newbie sailor. I'm in the St. Pete, FL area. Heading back to AL tomorrow or the next day.
Thanks for the input, and the sounding board, everyone.