[abl1111]

Where did you get the manual for $75 ? I thought it was like $150 for just the engine manual ( we are talking about the Mercruiser service manual, right ? )

<< I have a smartcraft monitor and cable I think will fit on your engine. I'm willing to let you borrow it.......if you like it you can get one.... >>

That is very nice of you. We don't even know each other and you're willing to help out. That in itself means a lot.

Thank you.

When I re-did my boat, I opted not to get the Smart gauge package because:
a) I was broke and it was expensive, and
b) I thought that analog was simple and accurate.

Today, I borrowed from my mechanic the Mercury Diagnostic Computer that plugs right into my boat. Talk about a nice toy ( sounds like what the SmartGauge would do ).

According to the diagnostics, the boat temp is on the money - 163-165 degrees, even at WOT. My gauge must be bad - even the replacement gauge ! I borrowed a buddies spare temp gauge also, a Faria brand, and hooked it up - shows me at 175 degrees from the sending unit. Infrared thermometer showed same at sending unit. At thermostat, 1.5" lower, it was 165-167 degrees.

That sounds OK to me.

I will wait for the raw water pump R/R till the Fall pullout.

I 'think' this case is closed. Just goes to show you, no matter how careful you are, sometimes it's something stupid.

I am going to look into eBay/online for a Smart gauge.. What do you see them for ? And, do you like having one ?
Is there a sending unit that is needed - is it an EZ install ?

Lastly, thanks again for being a good guy.

Alan