Get a second opinion quick. This diagnosis doesn't sound right. You may have
gotten a bad repair. Water pump and fuel pump run off the same belt I think.
Might have even been a loose belt that caused the overheat. You probably
have a blown head gasket and or cracked or warped head.
JIMinFL
"Fred Dehl" wrote in message
...
Got a Monterey 27' with a 7.4L Mercruiser. Raw water cooled. Couple of
weeks ago I had the fuel pump and water pump replaced. Second time
running it out after that repair, it was running just fine for a half hour
at cruising speed and then almost instantly it overheated (from not even
registering on the temp gauge to 240 degrees) and shut down. A little bit
of smoke from underneath the flame arrestor. Oil was full, and not milky.

Got a tow back to the marina and their shop (who I've been using for
maintenance & repairs) tell me the block's cracked.

Everyone talks about blocks cracking from freezing, but here it is running
fine and then - bam, hot and dead.

What are the most common causes of cracked blocks, and might the shop have
screwed something up on the water pump job?

tia

FD

Belt driven fuel pump?? You sure it's not electric? I've never seen a
belt driven fuel pump. Besides, I think Merc recommends an electric
fuel pump for the 7.4.

John