whats the correct operating temp for a 98 Merc 5.7 V8 RWC Carb pushing an
alpha drive, and whats the correct T-Stat for this engine

Thanks

On Mon, 21 Jun 2004 12:18:31 -0400, "OSU" wrote:

whats the correct operating temp for a 98 Merc 5.7 V8 RWC Carb pushing an
alpha drive, and whats the correct T-Stat for this engine

Thanks


For my '97, it's right at 160F. For replacement parts, go he

http://www.mercurypartsexpress.com/P...phome.asp?CID=

You'll need the serial number of the engine. Then you'll know for sure you're
getting the right part.

John H

On the 'Poco Loco' out of Deale, MD
on the beautiful Chesapeake Bay!

"John H" wrote in message
...
On Mon, 21 Jun 2004 12:18:31 -0400, "OSU" wrote:

whats the correct operating temp for a 98 Merc 5.7 V8 RWC Carb pushing an
alpha drive, and whats the correct T-Stat for this engine

Thanks


For my '97, it's right at 160F. For replacement parts, go he


http://www.mercurypartsexpress.com/P...on/ServicePart
s/sphome.asp?CID=

You'll need the serial number of the engine. Then you'll know for sure
you're
getting the right part.

John H

On the 'Poco Loco' out of Deale, MD
on the beautiful Chesapeake Bay!

For my 92 it's about 160 for raw water cooled with water temps in the mid
80's. For freshwater cooled (heat exchanger) at cruise speeds (3k rpm
28mph) 180 and above 4k RPM (40mph) it's 200+

If boating sal****er, the temp is normally 160. But fresh water, you could
raise the temp to 190 and get better performance / milage. The 160 stops
precipitation of salt on to the engine cooling passages. Go to a decent
auto parts house and ask for a 160 or 190 thermostat for a 5.7L Chevy. Or
take the old one with you.
Bill

"OSU" wrote in message
ervers.com...
whats the correct operating temp for a 98 Merc 5.7 V8 RWC Carb pushing an
alpha drive, and whats the correct T-Stat for this engine

Thanks

Actually the 143 (or 140) degree thermostat is the salt water version AFAIK.
The 160 came later for fresh water use. Not sure if retro back to '94 for
me, as they still list the 143.

"Calif Bill" wrote in message
ink.net...
If boating sal****er, the temp is normally 160. But fresh water, you
could
raise the temp to 190 and get better performance / milage. The 160 stops
precipitation of salt on to the engine cooling passages. Go to a decent
auto parts house and ask for a 160 or 190 thermostat for a 5.7L Chevy. Or
take the old one with you.
Bill

"OSU" wrote in message
ervers.com...
whats the correct operating temp for a 98 Merc 5.7 V8 RWC Carb pushing
an
alpha drive, and whats the correct T-Stat for this engine

Thanks

I'd go with the 140 for salt and a 160 for fresh. Anything higher is too
close to overheating in a low pressure cooling system. If it's a closed
system, that's different. You can run a 190 no problem in a closed system.

"OSU" wrote in message
ervers.com...
whats the correct operating temp for a 98 Merc 5.7 V8 RWC Carb pushing an
alpha drive, and whats the correct T-Stat for this engine

Thanks