Oil pressure "Y"

LeslieTroyer · Jun 19, 2017

They make dual sender/switch oil pressure sensors. I have one on my C36. A "Y" or a tee would put the sensor too far from the engine and I worry the extended lever arm would cause the small pipe to break. IIRC it switched at 7psi and shad 0-150 psi analogue vdo output.

Les

seadaddler · Jun 19, 2017

Been there done that and don't do it.
I did add a Y to my Yanmar a few years back and maybe year after adding the Y one motoring back in Orient Point up in NY the Y did break and lucky for me the oil gauge was at the helm and saw it go to O and went below to find oil all over and lucky me did not ruin the engine.
Nick

JK_Boston_Catalina310 · Jun 20, 2017

The engine on your C310 already has a Y in place. See the photo I have attached. There is a T just above the switch that has a 45 degree elbow attached. The end of the elbow has a plug. Screw out the plug, screw in the sender.

Personally I would not use a combined switch and sender. When I had my switch go, I was able to confidently ignore the buzzing and get into safe harbor because my sender gave me a good oil pressure reading.

LeslieTroyer · Jun 20, 2017

JK_Boston_Catalina310 said:
Personally I would not use a combined switch and sender.
View attachment 137818

The switch failing will not kill the analogue sensor or vise-versa - the only thing they share is the ground connection and access to the oil for pressure readings. Plus I have the original switch in my spares box - along with another switch/analogue sensor in there as well...

marchem · Jun 20, 2017

Here's the relevant page from the 25XPB manual. Shows the connections (thanks JK for showing the picture), and what the pressure should be. Doesn't give a part # for the pressure sender itself.

JK_Boston_Catalina310 · Jun 20, 2017

Tdaddy2000 said:
Is that engine the M25xpb?

Yes on a 2001 C310.

JK_Boston_Catalina310 · Jun 20, 2017

LeslieTroyer said:
The switch failing will not kill the analogue sensor or vise-versa - the only thing they share is the ground connection and access to the oil for pressure readings. Plus I have the original switch in my spares box - along with another switch/analogue sensor in there as well...

As long as it's not the negative connector that fails. Which is what failed on my boat.

LeslieTroyer · Jun 20, 2017

No such thing on the sensors I've used. They ground thru the physical pipe connection to the engine block.

Les

JK_Boston_Catalina310 · Jun 20, 2017

LeslieTroyer said:
No such thing on the sensors I've used. They ground thru the physical pipe connection to the engine block.

Les

I guess you are right. Its a switch so both lines are positive. I just assumed the smaller terminal was negative.

marchem · Jun 21, 2017

LeslieTroyer said:
No such thing on the sensors I've used. They ground thru the physical pipe connection to the engine block.

Les

Les, have you got part# or info on the dual sensor you used? From the engine manual it looks like the thread is 1/8" NPT.

LeslieTroyer · Jun 21, 2017

Vdo 360 019. Or equivalent gives you a 0-80 psi gauge and 8 psi switch. If you have a different gauge check here for other options. https://www.vdo-instruments.com/sen...hes/pressure-sensor-with-warning-contact.html

marchem · Jun 27, 2017

Question for anyone with a C310 (or other boat with a similar engine control panel) who installed an oil pressure gauge: Where did you mount the gauge? There doesn't seem to be enough room in the engine control panel to put another 2" gauge. Did you get rid of the voltmeter? I was hoping to find a combo gauge, but they are all larger than 2".

LeslieTroyer · Jun 27, 2017

I did not install a physical gauge but rather have an RS11 that puts it on N2K so it displays on my I70 or MFD. I will probably replace my disconnected ampmeter wit a pressure gauge when I rebuild the board this winter.

Les
Universal m25

JK_Boston_Catalina310 · Jun 27, 2017

marchem said:
Question for anyone with a C310 (or other boat with a similar engine control panel) who installed an oil pressure gauge: Where did you mount the gauge? There doesn't seem to be enough room in the engine control panel to put another 2" gauge. Did you get rid of the voltmeter? I was hoping to find a combo gauge, but they are all larger than 2".

I put the gauge at the nav station. If the alarm goes off I can go below and check the gauge. I also go below to check the battery monitor to see how that is doing as well.

marchem · Jun 28, 2017

JK_Boston_Catalina310 said:
I put the gauge at the nav station. If the alarm goes off I can go below and check the gauge. I also go below to check the battery monitor to see how that is doing as well.

That's a good idea, but I've got so much stuff there already it may be a tight fit. Already no room for my tank monitor!

marchem · Jul 4, 2017

marchem said:
That's a good idea, but I've got so much stuff there already it may be a tight fit. Already no room for my tank monitor!

I'm thinking now that I might replace the volt meter in the console with the pressure gauge. I've got two battery monitors with voltage at the nav station, and voltage seems less important to me when motoring. It does mean running the wire will be a little harder, I guess. Bought a Sierra sensor and gauge. Installed the sensor. Other than a little oil leaking it was real easy.

seadaddler · Jul 5, 2017

I have found oil gauge is really not that important,I change my oil more than really needed but oil so cheap and check the dip stick often before every start up and make sure the idiot warning light is working and look under the engine for any kind of leak.
I find that a temperature gauge is more important and found that when motoring how important it it is if and when something clogs the strainer or maybe there is a problem with a leak can over heat and cause big problems and been boating many years and it is cooling related problems happen more and so I do a temp gauge at the helm and if I see that gauge is showing higher than normal than I know to check things out but that's just me and so far been working real good.
Nick

Oil pressure "Y"

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