oil pressure gauge not working on boat
The oil pressure gauge on a 2003 Boston Whaler 160 DAUNTLESS boat with a Mercury 115 FOURSTROKE engine does not work. I got my boat back from storage and started it up.
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If it does the fault short is in the wiring.
. Next check the gauge to see if it pegs out ignition on wire off sending unit. Got 12 vlts at the gauge plus tested the gauge on the bench and got deflection. I plan to replace the oil pressure sender but it will be a couple weeks before that happens.
It started last year either the gauge would work or go completly dead. If the sender or wiring is grounding out it will peg the oil pressure gauge needle as it works on percentage of ground. I drilled a small hole in the side of the gauge and used the compressor to blow the water vapour out of the gauge as it was fogging up - so I may have ruined it although the fuel etc still works.
The dash gauges have 3 wires to them. Seeks suggestions on how to diagnose the cause of the gauge malfunction. Dont forget always keep an eye on your oil pressure gauge while youre out on the water.
Ohm the sending unit and get 240hms at zero oil pressure so. Purple to ground shows 13 volts. Oil Pressure Sender sensor.
If your oil pressure gauge isnt working it could be due to a few different things. I know the gauge is getting power because it lights up but the gauge does not register anything at all. MPH gauge - these gauges work off of water pressure - as the boat moves through the water water is forced into a pickup tube also known as a pitot tube which in turn pushes against a diaphragm.
Now I have no movement at all in the gauge. Grounded the wire at the sending unit and get nothing on the gauge. Engine apparently has proper oil pressure so the problem seems to be electrical.
Test gauge shows 56 PSI which is the proper lift point for the bypass valve. Oil gauge not working - again my guess is that the sender wire was never plugged back in on the engine sending unit when the engine was re-installed. Oil Pressure Gauge Not Working.
First check to see if the fuse is blown. My problem is the oil pressure gauge isnt working and im not sure what is left to do here is a sumary of whats going on. For gauges with 9205 sender.
Heres the full length video on Troubleshooting Your Oil Gauge Sending Unit in a Mercruiser 260 EnginehttpsyoutubehQ6rogMrt7IThanks for watching. If you do not have access to a resistor but do have another working fuel level or temp gauge you can use the power ground and signal connections from the known good gauge on the oil pressure gauge to verify that the oil pressure gauge is OK. 47 ohms is approx 90 PSI 100 ohms is approx 70 PSI.
The good news is she started on the first try bad news is the pressure gauge reads 0 psi. Purple for power black for a ground and light blue which goes back to the pressure sender. I have a 1993 Mercruiser 30L with intermittent oil pressure gauge trouble.
A quick check is to pull the sending unit wire off at the sending unit on the block. If it is replace it and see if that fixes the problem.
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