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Water Pressure gauge? how to install on 496?

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Old 04-14-2009, 01:06 PM
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Question Water Pressure gauge? how to install on 496?

looking to get a water presure gauge. probably a manual one, not electric.
question is, whats the install consist of?
power, ground and light is a given, hows the rest work? where to install, what do i need on an 03 496 mag

thanks in advance
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Old 04-14-2009, 05:09 PM
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There is a drain plug on the bottom left front of the engine, Remove it and install the correct fitting to hook up the plastic water pressure line to. It is also a good idea to install a small valve closets to the engine before the plastic line incase the plastic line breaks at sea, you can close the valve and keep running.
Run it to the gauge and your done. Use ties to keep the line secure.
Do not tighten the plactic line with furrel to tight or it will cut the hose just snug it up.
You will not see pressure on the gauge when you hook up rabbit ears to a water hose. You will see pressure at around 25-30 mph running in the water. Do not exceed 25-30 [email protected] WOT. or 120mph which ever comes first. Some will tell you you can run 45-60psi but after you change a head gasket you would have wished you hadn't.
How it works, water pressure pressurizes the air in the line to read on the gauge, don't think you have to have water in the line to read pressure. You can acctually blow in the line and see pressure but you may turn blue.

Last edited by Velocity Vector; 04-14-2009 at 06:46 PM.
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Old 04-15-2009, 11:39 AM
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ok, i know the spot you are talking about. so i will not see pressure until i start running the boat up to speed. even tho its a 0-35 psi guage?
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Old 04-15-2009, 02:56 PM
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Quote:
Originally Posted by noyzee View Post
ok, i know the spot you are talking about. so i will not see pressure until i start running the boat up to speed. even tho its a 0-35 psi guage?
Correct, If I recall there are 2 plugs close together one is blue with the thumb wings that's not the one it is the other one. The blue on has real coarse threads and the other has pipe threads.
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Old 04-16-2009, 01:55 PM
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great, thanks for the info.
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Old 05-28-2009, 04:33 PM
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We put a T on my power steering cooler on the back of the motors and stuck it in there. Those factory drains come in useful when you are winterizing a boat......
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