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Author Topic:   Water Pressure Gage Problem.... or not?
etbliss posted 07-30-2009 11:36 PM ET (US)   Profile for etbliss   Send Email to etbliss  
I have a 2004 Merc 90 hp 4 stroke on my 2004 BW 170 Montauk.

I had the throttle cables replaced and perhaps I missed this before but all of a sudden My water pressure gage is not registering, however I am putting water out of the engine while under way.

My question is... Is my Water pressure gage supposed to be registering? If so what might be causing this problem?

Thank you for your help

Gig Harbor, WA

scratch 1 posted 07-31-2009 01:44 PM ET (US)     Profile for scratch 1  Send Email to scratch 1     
Yes, the water pressure gauge should be registering.

Obviously, there could be a few reasons for the water pressure gauge not to function, however, the two most common reasons I have come across on my boat are as follows:

1. The water pressure gauge line is thin tubing and can be easily “kinked” somewhere between the motor and the gauge, especially since you were working within the same area.

2. I run my Montauk in salt water and have to clean the water pressure guage line almost yearly with my general maintenance. The lines become clogged with salt deposits and causes the gauge to read poorly or not at all. I clean the line by disconnecting it in the motor and at the gauge…I place one end in a glass of water and suck through the other end (like a straw)…it sounds odd, but it works.

etbliss posted 07-31-2009 01:56 PM ET (US)     Profile for etbliss  Send Email to etbliss     
Thank you for your post. I'll have a go at it tonight.


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