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Author Topic:   Montauk 170: Engine Water Pressure Gauge
RioRaft posted 05-19-2004 09:54 PM ET (US)   Profile for RioRaft  
Upon returning to the water for the first time this season the engine water pressure gauge on my 2003 Montauk 170 does not work. The engine water pump confidence stream comes out the back, and all sounds and runs well. Should I be concerned about the water pressure gauge not reading? What does it really do?


Maximus posted 05-19-2004 10:12 PM ET (US)     Profile for Maximus  Send Email to Maximus     
Somewhat of a different problem, but my tach and volt meter didn't work on the first run of the season. I removed the dash and cleaned the connections and all is well. I think the water pressure gauge has the transducer at the gauge, so water is fed all the way to the dash. Can anyone correct me here? Check for a kinked line?

AQUANUT posted 05-19-2004 10:25 PM ET (US)     Profile for AQUANUT  Send Email to AQUANUT     
Actually the water pressure gauge works in the same way the speedo works. There is initially air in the line, then water under pressure forces the air to the gauge. With no place to escape in the speedo or the water pressure gauge, I believe it is actually reading air pressure, since there is not a way to purge the lines.

A blockage (in the line) will give a low or zero reading on these type of gauges. The water pressure supply line to the gauge is a small diameter light grey hose that attaches various places on various engines. I would check it where able, or disconnect (the line) at gauge, run engine and see if it is pumping (water).

jimh posted 05-20-2004 08:47 AM ET (US)     Profile for jimh  Send Email to jimh     
[Administrative post]
RioRaft posted 06-16-2004 03:40 PM ET (US)     Profile for RioRaft    
Thanks for the advise, I finally went under the console and found that the PSI guage does in fact have have a small (maybe 1/8 inch) black hose running from the engine to the PSI guage. The way the factory installed some of the ty wraps it caused too sharp of a bend and a kink in the line. I simply cut off the ty wraps and replaced them after re-routing the hose. I now realize that the PSI guage never woked properly last year. All is well in Sea Isle City NJ

Thanks again for the tips.


swist posted 07-08-2006 12:28 PM ET (US)     Profile for swist  Send Email to swist     
Which side of the thermostat is the pressure taken from? I have only used my new (to me) 2004 Montauk a couple of times and the pressure behaved normally once I was under way, but I just noticed yesterday that it read zero when the engine was just started when cold - I only had time to go out to the mooring and could not verify that the gauge would come up to pressure eventually. The telltale was always strong.

What is the normal cold start behavior of this gauge?

mikeyairtime posted 07-10-2006 04:22 PM ET (US)     Profile for mikeyairtime    
Mine plugs regularly. I've taken it off and blown junk out of it a couple times. This is the first outboard I've owned with a pressure guage so I don't worry too much. If the tell tale is pumping all is well. Coincidentally mine started working again on Saturday after not working for a while. It fixed itself. I'm just wondering what I'm going to use that hole in the dash for when I finally do trash the guage.
bigjohn1 posted 07-10-2006 09:14 PM ET (US)     Profile for bigjohn1  Send Email to bigjohn1     
mikeyairtime, I with you on this. I'd say an hour meter would be a great thing to put back in that hole.
Barney posted 07-10-2006 09:16 PM ET (US)     Profile for Barney  Send Email to Barney     
My replacement gauge might have Evinrude written on it.

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