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Old 29-05-2008, 00:56   #1
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Oil Pressure Guage/Sender

I want to add oil pressure & coolant temp guages to monitor my engine rather than relying just on the warning lights.

My motor is an ageing Sole Mini34 - 4 Cyl freshwater cooled. Runs very well with no apparent problems.

Most oil pressure guages I see around on the market are either 0-80 or 0-100 psi - which guage/sender combination do you reckon would be most suitable for the motor? The Instruction Manual makes no mention of oil pressure.

Also - the motor currently only has a Oil Pressure Switch to activate the warning light. There doesn't seem to be much room to fit the proposed new sender, I will have to have another look on the weekend to make sure. Do manufacturers typically have alternate locations to fit such devices?

Thanks
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Old 29-05-2008, 01:19   #2
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The gauge usually comes with the sender it requires.
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Old 29-05-2008, 01:57   #3
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Oil Pressure Sender/Guage

Thanks Alan,

I will be purchasing a guage with the matching sender.

My question really is which range instrument (matched guage & sender) would be the most appropriate for my motor - the 0-80 or the 0-100 - does it matter?
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Old 29-05-2008, 03:02   #4
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The discontinued Sole Mini 34 is based upon the 4 cylinder 31 HP Mitsubishi engine.
The OEM Oil Pressure Gauge, as supplied by Sole Diesel (they 'Marinize' Mitsu'), is 150 psi (10 bar) .
Accessories:
Engine instruments - Sole Diesel
Sole Home: Motores marinos - Sole Diesel

VDO makes a 10bar/150psi Gauge/Sender:
Part number: 350 041
Goto: VDO Performance Instruments
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Old 29-05-2008, 03:33   #5
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You da man, Gord!

I went to the Sole site and completely overlooked the instruments section. Nice looking guages. I bet they are pricey.

They look similar to Stewart Warner faces.
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Old 29-05-2008, 03:53   #6
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Stewart-Warner (0-150 PSI) HD+ Gauge #82397 & Sender #279C
(0 psi = 40 Ohms ~ full scale= 33.5 Ohms)

A 150 psi S-W gauge from the 1950s.
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Old 29-05-2008, 03:59   #7
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I’m not certain why Sole offers the 150 psi gauge.
I’d be interested to see the Mitsubishi engine specifications, and use a gauge whose full-scale reading is about twice the normal operating pressure.
Since electrical instruments are generally most accurate at about Ĺ full-scale, and most diesels run in the neighbourhood 40psi, the 80 psi gauges are most commonly used.
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