Water pressure gauge line on a 1996 Merc 150

hkeiner

Lieutenant Junior Grade
Joined
Oct 17, 2006
Messages
1,055
I was just planning to buy and install a water pressure gauge kit for my motor. I have read that it is generally recommended to tap the line into the water hose at the top of the motor, just behind the flywheel. However, as I was reading my Mercury OEM shop manual to get more information, I found the below section that refers to a pre-existing line exiting the front of the motor (if I understand it correctly).​

My Mercury shop manual covers a range of models (years and horsepowers) so I am not sure if this section applies to my motor. I don't see such a line exiting my motor at the front. Has anyone found and used this line for a pressure gauge, and if so what model Mercury motor was it used on?​


Quote from Mercury shop manual:​

Water Pressure Check

Water pressure may be checked by attaching a test
pressure gauge to the top of the engine block.
A water pressure line (GRAY colored) is provided
that exits at the front of the lower cowl. A dash style
gauge may be connected to this line to register water
pressure.
 

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gss036

Commander
Joined
Jan 18, 2003
Messages
2,914
Re: Water pressure gauge line on a 1996 Merc 150

I have never seen one, do you have the line on your engine? That would be the first thing to confirm. If it is there you can probably use it.
 
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