I think this is what you want, Jerry

Thanks I will look

I will need one of these also??

Water Pressure Adaptor MAR-WPRES-AD-TR

Thanks

oh. so:
1. the diagram I posted indicates the older type "mechanical" gauge - but you said NMEA so that's the electrical sender, shown installed in the upper yellow circle in this photo (the mechanical would have been installed in the lower yellow circle)



You will not need those adapters in your link - that would be for a mechanical gauge.
The information I have seen shows that the electric sensor MAY come as a "kit" including the necessary "connector" for your engine:



There is only one poster here who knows for certain - Boscoe99.

Perhaps he will have a look.

Im using this Lowrance EP-90R Pressure Sensor

water pressure 1.jpg It has a hose type hook up to covert to mnea

2014 Yamaha MRP Catalog

See Lowrance documentation for Lowrance devices.

Here is a pic of engine

Nice looking engine - clean!

Jerry - I don't understand, since you have an engine with built-in NMEA 2000 data output from the ECU - including - with the additional of the Yamaha sensor - cooling water pressure, why you don't go that route?

but if you must use that Lowrance device,

the only option I see is to install it into the rubber tube for the "telltale" - the "pisser".

You could cut that tubing, rejoin it with a "tee" and then connect the Lowrance sensor to the third leg of the tee.

You would need a hose-barb "tee" fitting - of the appropriate size to fit that tubing

- an additional short length of tubing to connect one leg of the tee to the barb on the Lowrance sensor,

and four small zip-ties.

If a "bastardized" configuration is desired then he can use the adapter he mentions and it can be screwed into either of the ports on the motor. It will connect to the Lowrance device via a short section of hose.

oh. Right.
I'm a little slow this morning, obviously.

Allright thanks for the help so far.

My boat came with analog gauges, I added the network and the yamaha to lowrance cable to be able to read my engine data on my lowrance hds or fish finder or what ever you want to call it??

I have a lowrance LMF-200 gauge or my fish finder to read data, I have no room on my dash to add a manual gauge??

I dont see how you guys call this a bastard system?? Tell me what else to do??

neither the lmf or hds will read water pressure, with out adding a sensor

Or if you can lets go back to the picture and someone please show me where to hook it? Thanks again Jerry

ok, so you are availing yourself of Yamaha's NMEA 2000 data

and yes, to get cooling water pressure, you must add a sensor.

yamaha has already given you a leg up on that,
you have a connector on your engine harness marked "W"
located very close to a "plug" which,
if removed,
would allow you to install the Yamaha Cooling Water Pressure Sensor

(the plug is located just above the upper spark coil,
its hi-lited in yellow in an illustration earlier in this thread)







and then you wouldn't have to run any other wire !

but,
you could remove that same plug,
thread in a "hose barb" fitting,
and then connect a rubber tube between that and the Lowrance device.
Then you would need to route the cable on the Lowrance device
to the closest point of your NMEA 200 backbone,
and connect it to a tee....

Jerry, remove the blind plug - see arrow in attached pic of your F150 - which is the plug fairdeal mentioned- then you can install the device (Water Pressure Adaptor) you mentioned in Post #4, then attach your EP 90R pressure sensor, then plug into your NMEA network. By doing it this way you will add the pressure sensor as a drop in your NMEA backbone and you will have and additional wire to feed the cable through the engine grommet.

When someone asks about a water pressure gauge I usually chime in with some info on what to expect once installed (see Yamaha FAQ below.) You have already purchased the adaptor, however, and I hope to save someone the cost of the Yamaha pressure sensor that fairdeal mentioned in case they are looking for low speed water pressure as I was. The device is quite expensive - but its plug and play and you can read water pressure from your Lawrence fish finder/chartplotter. With the new Gen 2 Touch and Gen 3 models you can add engine data to any page. However, you can just as easily display water temperature without the pressure adaptor as long as you are using the engine data interface anyway. Water temperature is what you are really interested in - water pressure is just a proxy for water temperature.
Hope this helps.

FAQ
What is the minimum water pressure required for my Yamaha outboard(s)?
All Yamaha outboards have a minimum water pressure of eleven (11) psi at Wide Open Throttle (WOT). There are no announced water pressure specs for low or mid-range operation at this time. This is due to our high volume low pressure cooling system design. In fact, you may see zero pressure at idle, as most water pressure sensors start working at 3-psi.