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On Tue, 07 Jul 2009 15:55:13 GMT, "Mike Slater"
wrote:


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On Wed, 01 Jul 2009 00:34:36 GMT, "Mike Slater"
wrote:

I am not trying to stir anything up by asking this question, but because
the
water cooling passages are by design so narrow in the vicinity of the
thermostat on my 1995 Merc 60hp 2-stroke Bigfoot, and small debris was
constantly lodging itself on the waterpump/impeller side of the
thermostat
I
decided to just run without it. I have been doing it for two seasons
now.
I measured the water temperature at the powerhead with a laser unit at
about
90 degrees. I am getting ready to advise that my neighbor do the same
thing
and I just wanted to hear some comments first. What will it hurt?

Mike

The new computer 4 strokes won't run without a thermostat.
It detects a fault and puts you in "limp home"mode.

Any idea how it detects it the missing thermostat? Based on temperature
or
the physically missing part?
It looks for proper operating temperature after a given period of
time. Cars will throw a code for this too but they don't seem to give
as noticeable a "limp home" mode.
When I had the thermostat self destruct in my 60 merc it was pretty
much idle speed and beeping when I removed it. I thought about wedging
the plate open and putting it back in but I was not that far from the
house. It turned out I had a spare used one in my tool box but I
didn't see it until I knew I had the "won't run without one" problem.
I felt lucky I got the housing off and back on once without dropping
something in the water and I wasn't pushing my luck.

Speaking of a self-destructing thermostat, here is what I removed from my
neighbors boat. No wonder he had an overtemp alarm.
http://www.thespaceexplorers.com/mis...tat_broken.jpg
And if you missed the salty one I had in my motor check this out
http://www.thespaceexplorers.com/misc/thermostat.jpg