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Author Topic:   Water Pressure Gauge Failed
drewc posted 09-16-2003 12:12 AM ET (US)   Profile for drewc   Send Email to drewc  
Anyone on the board have experience with failure or their 'Water Pressure' gauge on their '03 170MT w/90HP-4? Last time out, as I powered up after leaving the harbor, I noticed that the above-mentioned gauge was not indicating the typical 10-14 lbs reading, but instead looked to be indicating a smidge over 1. Getting nervous, I called my dealer...he said that as long as water was being pumped through the cooling system (as evidenced by the 'rooster tail' coming out of the back of the engine cowling), I was ok. Either the gauge has failed or the soft tubing is kinked or otherwise restricted in some way. I checked the tubing..looked ok to me. Don't know about the gauge, but seems unlikely...anyone have a similar experience?
Thanks, Drew
lhg posted 09-16-2003 02:28 AM ET (US)     Profile for lhg    
Water pressure gauges work by compression of the air in the tube, caused by water pressure from the engine. Speedometers work the same way. You can test the water pressure gauge by lightly blowing into the back of it and having someone tell you if the dial moves. Mercury's gauges are made by Teleflex, and these do go bad occassionally. They carry a 2 year warranty.

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