Instaling Temp gauge

jollymon

Petty Officer 1st Class
Joined
May 2, 2002
Messages
293
I have a Merc 90hp 2 stroke 2002, I am not comfortable with just the over heat alarm. Is there any way to and either a water pressure gauge or a Temp Gauge? My concern is if you lose cooling water, why does the alarm go off? After the motor over heats. I would like a little advance warning. What made me think of this, is when I went to pulled my boat for the season last year, I had no water coming out of the pee hole, The pee hole was clogged and I was 600 yards from the ramp, had I been out on the river it could have been more of a problem.
 

roscoe

Supreme Mariner
Joined
Oct 30, 2002
Messages
21,752
Re: Instaling Temp gauge

A water pressure guage kit is easy. They coast $50, but wait, you're in Jersey, so it will cost $60. :D (long story)<br /><br />YOu install the guage in the dash, run a thin plastic tube to the motor. Tap into the waterline or thermostat housing on the motor. Everything is covered in the instructions. The only thing not included in the kit is the thread sealing tape, the hand drill, and the hole drilling bit for the drill.
 

jollymon

Petty Officer 1st Class
Joined
May 2, 2002
Messages
293
Re: Instaling Temp gauge

Roscoe,<br /><br />I think that would do the trick, If I have presure, Then I should have water flow. What should the presure be, The only kit I have found reads up to 60PSI. that sould very high?
 

roscoe

Supreme Mariner
Joined
Oct 30, 2002
Messages
21,752
Re: Instaling Temp gauge

Water pressure varies from motor ot motor.<br />Generally, about 2-4 lbs at idle<br />8-10 lbs at cruise,<br />and 13-18 lbs at full throttle.<br /><br />My motor is 3#, 8#, and 14#.<br /><br />THere are 30# guages available. <br />The 10th one down on this page:<br /> http://www.iboats.com/mall/index.cgi?prod_id=22216&current_category=pressure gauge&cart_id=663687856 <br /><br /> https://www.surplusunlimited.com/Me...Code=1&Product_Code=1640&Category_Code=700-25 <br /><br /> https://www.surplusunlimited.com/Me...Code=1&Product_Code=2205&Category_Code=700-25
 
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