Water pressure gauge mercury outboard

Water pressure gauge mercury outboard DEFAULT

How Does a Boat Water Pressure Gauge Work?

How Does a Boat Water Pressure Gauge Work

Ever wondered what precious parts your boat comprises? Whether you&#;re a new or old boating enthusiast, it&#;s always helpful to know your boat to the core. Some of the information is valuable because it can potentially save your life when you&#;re out on your fishing boat.

Why are boat water pressure gauges so crucial to the vehicle, and what functions do they perform? I will talk all about it and, more importantly, shed some light on the pressure gauges&#; working principle.

When you have a basic understanding of these gauges, you can troubleshoot minor problems to prevent big boat problems. So, let&#;s get to it.

Boat Water Pressure Gauges

Considering the operation, I would say that the boat water pressure gauge is one of the top three gauges on your boat. It&#;s a device that measures and monitors the water pump and impeller on your ship.

The monitoring is crucial to prevent the outboard engine from overheating. It continuously checks the water pressure to the engine and alerts you when there is a noticeable decrease so that you can take necessary action.

In addition to that, boat water pressure gauges also indicate the performance of water pumps and tanks. Hence, they can show faulty parts, so that you don&#;t get into any trouble.

Water Pressure Gauge Working

In terms of design, water pressure gauges are quite like other pressure gauges. Therefore, there isn&#;t much of a difference between the designs from different manufacturers. Of course, the cooling system methods are different, but we will discuss that some other time.

As for water pressure gauges, there is a water inlet that sits on the outboard engine. The water flowing through the tubes makes its way to the pressure gauge, where it&#;s interpreted to numerical values for user understanding.

Water Pressure Kits

Usually, boat water pressure gauges come in kits. It makes them more comfortable for the user to install them on the outboard engine. In such a kit, you will find fittings, tube adapters, and the gauge.

In most cases, water pressure gauges measure up to 40 PSI because that&#;s more than the maximum pressure you will observe on a boat. Generally, high-power boat engines can go up to a maximum of 30 PSI. The average pressure range is around 8 to 12 PSI.

Different manufacturers, such as Yamaha, Mercury, Evinrude, etc., have other models of dial sizes, pressure ranges, and fitting mechanisms.  

Boat Water Pressure Gauge Installation Guide

If you are a DIY lover, you may want to install your next water pressure gauge all by yourself. So here is a quick guide on how you can get it done:

Choosing the Right Spot

Firstly, identify the spot on your boat&#;s bulkhead or dash where you want to install the gauge. Make sure that the place is free from water lines and wires. It must be easily accessible to allow easy reading of the indicator.

Drilling a Hole

Once you have chosen a spot, drill a hole in your dash. The diameter depends on the type and manufacturer of the gauge. A 2⅛ inch gauge is one of the commonly used boat gauges. Make sure to drill precisely, or the indicator will sit loosely in the hole.

Sealant

To prevent any possibility of loose fittings and water leakage, apply some silicone sealants around the gauge rim. Next, fit the gauge in its hole and tighten according to the given mounting mechanisms.

Connect the Tubes

Find the water tap on your engine block. Remove the tap and connect the gauge pressure tube to the engine. Make sure to tighten the joints and confirm that there are no leakages.

Test your Gauge

You are now ready to test your gauge. Start the engine and check the following:

  • The needle must move smoothly inside the gauge
  • The gauge doesn&#;t vibrate in its grove. If so, apply more sealant
  • There must be no water leakages at either end of the connected tubes.

How Vital are these Gauges

Among all the gauges you have onboard, the water pressure gauges are the earliest indicators of faults. Therefore, you must never compromise on their working and calibration. As soon as the water pressure drops inside the tubes, the gauges will indicate the apparent pressure drop.

Why Water Pressure Decreases

Although pressure gauges don&#;t have a role in this, it&#;s valuable to know why water pressure reduces. Here are some common causes for reduced water pressure to the outboard engine:

  • Use of old or faulty impeller
  • Faulty Engine
  • Blocked water tubes

Is it Possible to Get a Negative Pressure Reading

Negative readings can be a problem with digital gauges. However, analog water pressure gauges usually do not have this issue. If you see a negative reading, it&#;s time for either calibration or gauge replacement. 

A negative reading may seem funny, but it can be a severe problem when you are out in deep waters.

Tips to Maintain Water Pressure Gauges

Water pressure gauges are simple devices that don&#;t require much maintenance. However, it&#;s better to keep regular checks for efficient performance. Consider the following:

  • Check if the gauge pointer flutters during operation
  • Perform gauge calibration after every six months. You will need professional help for proper calibration
  • Keep the dial clean and prevent dust or mud.

Conclusion

Water pressure gauges can be lifesavers that prevent engine overheating. After the tachometer, they are the most valuable boat accessory, so you must make sure that they are working.

So, it won&#;t hurt to invest some extra bucks while buying these gauges. Make sure to check the calibration date while purchasing. Also, calibrated gauges come with certifications, so ask your supplier about the proper documentation.

In addition to indicating heating problems, pressure gauges can also indicate a faulty water pump. For instance, if the indicator shows a consistent low-pressure reading, it could mean that your pump needs some repair and maintenance.

In a nutshell, boat water pressure gauges can make your boating much safer and reliable.

Filed Under: Guides

Sours: https://crowsurvival.com/how-does-a-boat-water-pressure-gauge-work/
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    Water pressure gauge hook up

    I have a 99 Mercury EFI that I just rebuilt and I need to hook up my waterpressure gauge that is in the boat, my 79 Merc had it hooked into the top of the motor and it worked fine my new motor has a hose that comes out of that fitting and goes down to the poppet valve, I spliced into that and I can't get water pressure over 5 lbs, there is plenty of water coming out of the pisser and i took waterpump apart and resealed it when I rebuilt the motor. The merc manual say's there is a grey hose in the lower cowl, front of motor. ,(is that head side or injector side?) that the gauge can be hooked into. i only see the clean out and pisser in the lower cowl, Thanks in advance
    91' Nitro TF
    93' Glassport vt, Merc EFI

  2. Best place to get press is from the exhaust divider on HP motors. Have a diag of where to drill and tap, have posted it before but can dig it up if needed.

    Dave
    Cougar 19 tunnel,90 L Bridgeport EFI in middle of restoration.
    BAJA Sunsport , 96 Pro Max
    79 12' Auminum, 95 Merc
    RIP Stu
    "So many idiots, so few bullets"

  3. ,  AM#3
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    If you could dig it up for me that would be awesome just getting used to this forum thing, thanks Jamie
    91' Nitro TF
    93' Glassport vt, Merc EFI

  4. Click image for larger version.  Name:	water press fitting in exhaust plate.pdf  Views:	  Size:	 KB  ID:
    Here it is this was sent to me around after changing the exhaust plate to the updated version on my hp and had strange water press readings. Worked great on my Race motor but never tried on a fishing motor. Would think all the coolant passages are the same but do not know for sure.

    Dave
    Cougar 19 tunnel,90 L Bridgeport EFI in middle of restoration.
    BAJA Sunsport , 96 Pro Max
    79 12' Auminum, 95 Merc
    RIP Stu
    "So many idiots, so few bullets"

  5. Also have some installation instructions for a Merc water press gauge that say to install the gauge sender in the hose with a tee coming from the top of the block where the typical water press fitting was normally located. My lost 10 psi when the exhaust adapter was put in, thought it was because the dumped more water on the tuner to keep the tuner from cracking. Changing to the exhaust divider showed more press than the top of the block. Never did get it back to what it was but assume sue to dumping more water on the tuner.

    If you do drill and tap the divider and it works let me know as sure this will come up again and would like to know if it also works on fishing motors.


    Dave
    Cougar 19 tunnel,90 L Bridgeport EFI in middle of restoration.
    BAJA Sunsport , 96 Pro Max
    79 12' Auminum, 95 Merc
    RIP Stu
    "So many idiots, so few bullets"

  6. ,  PM#6
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    Will this work on an 87 merc ? The plug in the top of the block is stuck and I'm trying to find another place to tap in Not sure why it never had a pressure gauge but I bought it this way. Sorry to hijack
    Hydrostream Viper - Mercury I6
    21' Hustler - Merc
    18' ArrowGlass CC Johnson -SOLD
    21' Seebold Eagle Merc
    15' Hydrostream Viper Merc - SOLD
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    13' Boston Whaler 40hp Merc - SOLD

    Drive it like you stole it!

  7. Not sure you have a 2 piece divider.

    Dave
    Cougar 19 tunnel,90 L Bridgeport EFI in middle of restoration.
    BAJA Sunsport , 96 Pro Max
    79 12' Auminum, 95 Merc
    RIP Stu
    "So many idiots, so few bullets"

  8. Quote Originally Posted by fishingmaniacView Post
    I spliced into that and I can't get water pressure over 5 lbs,
    if you did this with tha splice at tha top there's something not right

  9. Quote Originally Posted by tlwjkwView Post
    if you did this with tha splice at tha top there's something not right

    Just to confirm you are not getting more then 5lbs while running not on the hose correct?


  10. ,  AM#11
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    At that time it was on the hose, since then its been in the water an the readings are fine. Thanks for all the replys.
    91' Nitro TF
    93' Glassport vt, Merc EFI

  11. ,  AM#12
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    MY merc XR6 picks up from a fitting on the lower part of the exhaust divider. Should I look or a higher location

  12. ??? picture never have seen any "production" motor with a pressure bib on tha divider plate?


  13. have seen a coupla newer ones with a fitting and gray tube goin' somewhere but have no idea what its for?.. didn't mater at tha time!

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-Q43WATER PRESSURE GAUGE ASSEMBLY ( PSI)A2SS/ACT$$1,-Q41WATER PRESSURE GAUGE ASSEMBLY ( PSI)A1SS/ACT$$,11Q43--GAUGE, WATER PRESSURE ( PSI)SS/ACT$$1,1Q41--GAUGE, WATER PRESSURE ( PSI)SS/ACT$$,12 --CONNECTOR, WATER PRESSURE GAUGE (90)NLA$$1,13 --LIGHT BULB (#53R)NLA$$1,14A4 --SOCKET ASSEMBLY, LIGHT BULBNLA$$1,15 --ADAPTOR, CYLINDER BLOCKNLA$$1,5 --ADAPTOR, CYLINDER BLOCKNLA$$,16 --NUT, TUBE FITTINGNLA$$2,27 --TEE, CYLINDER BLOCK TO ADAPTORSS/ACT$$,18A7 --CABLE ASSEMBLY (BLACK)ACT$$1,19A09 --TUBING, WATER PRESSURE GAUGE (20 )SS/ACT$$1,110 --BRACKET, MOUNTINGNLA$$1,111 --LOCKWASHER, MOUNTING BRACKETACT$$2,212 --NUT, MOUNTING BRACKETACT$$2,213 --STA-STRAPACT$$5,5
Sours: http://www.mercruiserparts.com/bam/subassembly///
How To Burp A Pressure Gauge

Water Pressure Gauge KitA23

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Product Fitment Grid

This guide is to be used as a reference only. You must verify fitment using your model or serial number.

BRANDMODELVARIOUS YEARS
Mercury OutboardEFI [L PRO XB]-xxx----
Mercury Race Outboard EFI [CL SM OS]--xx----
Mercury Race Outboard EFI [CL SM]-xxx-xx-
Mercury Race Outboard EFI [CS EFI]---x----
Mercury Race Outboard EFI [CS SM]-xxx-xx-
Mercury Race Outboard EFI [CXL SM]-x------
Mercury Race Outboard EFI [L SM OS]--xx----
Mercury Race Outboard EFI [L SM]-xxx-xx-
Mercury Race Outboard EFI [RACE OS]-xxxx---
Mercury Race Outboard EFI [RACE-DRAG]---x----
Mercury Race Outboard EFI [RACE]-x------
Mercury Race Outboard EFI [S SM]-xxx-xx-
Mercury Race Outboard EFI [S]-x------
Mercury Race Outboard EFI [XL NO G/C]---x----
Mercury Race Outboard EFI [XL SM]-x------
Mercury Race Outboard F1 [RACE]-x------
Mercury Race Outboard OS [CL EFI]x-------
Mercury Race Outboard OS [CXL EFI]x-------
Mercury Race Outboard OS [L EFI]x-------
Mercury Race Outboard OS [RACE OS]x-------
Mercury Race Outboard OS [XL EFI]x-------
Mercury Race OutboardL [CL EFI]x-------
Mercury Race OutboardL [CS EFI]x-------
Mercury Race OutboardL [CXL EFI]x-------
Mercury Race OutboardL [EFI]x-------
Mercury Race OutboardL [L EFI]x-------
Mercury Race OutboardL [XL EFI]x-------
Mercury Race Outboard XS [CS SM]--xx----
Mercury Race Outboard XS [L SM]--xxx---
Mercury Race Outboard XS [L TM]--xxx---
Mercury Race Outboard XS [L]--x-----
Mercury Race Outboard XS [OPTIMAX]----x---
Mercury Race Outboard XS [S SM]--xxx---
Mercury Race Outboard XS [S]--x-----
Mercury Race Outboard X [CL SM]--x-----
Mercury Race Outboard X [CXL FM]--x-----
Mercury Race Outboard X [L NO G/C]--x-----
Mercury Race Outboard X [L SM]--x-----
Mercury Race Outboard X [L TM]--x-----
Mercury Race Outboard X [XL FM]--x-----
Mercury Race Outboard X [XL NO G/C]--x-----
Rigging PartsInstruments-Gauges and Components-------x

Supersession Chain

Due to manufacturer policy OEM Mercury products can only be shipped to addresses within the United States.
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Outboard mercury water gauge pressure

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water pressure sensor for 75hp Mercury 4 stroke outboard

Water pressure gauge decision Mercury outboard

Re: Water pressure gauge decision Mercury outboard

I guess the deal with gauges always pointing in the middle of the scale on a boat is rather meaningless unless one is into racing. The tach may be at cruise rpm with an I/O but not with an outboard, the speedometer rarely is, the fuel gauge is only when the tank is half full and that's not accurate either, oil pressure isn't usually at cruise, wot, nor idle, and therefore what use is a 30 PSI gauge when the engine is not capable of putting the needle in the upper half. If the engine is capable of over 15 PSI then this is all moot. Most folks don't look at gauges often enough to notice a sudden drop until the alarm goes off at which point they notice the low/no water pressure. They are more apt to noice subtle drops with each use as the impeller goes bad. I look at the 30 PSI gauge like a or MPH speedometer on most family sedans these days. Pegging the needle is wishful thinking unless you are being pushed by a Corvette, Viper, or a NASCAR Sprint Cup car.

 

Sours: https://forums.iboats.com/threads/water-pressure-gauge-decision-mercury-outboard/

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Talk to your mother yourself, - and she gave me a bottle with some pills. At home, I showed the bottle to my mother, she turned it over, read the instructions, sighed. - If you got into all this, the chest, although small, is really needed. At school, no one will notice the clothes anyway.

And I began to use the pills as intended.



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