SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: j. mayanard on March 02, 2013, 02:14:22 PM
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was wondering what your guys opinions where on oil gauges. my boat is set up for electric know but is giving me problems. put my second new oil sending unit on it and still doesnt work. when i turn the key on the on position the needle goes to half way. when i crank the motor it moves like its building pressure. when it starts the needle drops down to 0. I have grounded it and all that good crap to make sure my ground and all that is working. so my next idea was to run a mechanical oil pressure gauge but wasnt sure if it was a good idea or not. any ideas or info would be greatly appreciated. :banghead:
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Im running a mechanical oil pressure gauge. I like it. I have run them before in cars. Mine uses a stainless steel braided line verse that clear plastic tube.
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was wondering what your guys opinions where on oil gauges. my boat is set up for electric know but is giving me problems. put my second new oil sending unit on it and still doesnt work. when i turn the key on the on position the needle goes to half way. when i crank the motor it moves like its building pressure. when it starts the needle drops down to 0. I have grounded it and all that good crap to make sure my ground and all that is working. so my next idea was to run a mechanical oil pressure gauge but wasnt sure if it was a good idea or not. any ideas or info would be greatly appreciated. :banghead:
Buy a new gauge and sending unit combo. they make different ohm sending units for different gauges.
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its kind of a double edge sword! mechanical or not. mechanical is more accurate and is real time, however if that line to the gauge were to break or get a pin whole in it . you will have oil everywhere ! and if your not paying attention ten quarts of oil in your boat and a boat anchor for a motor! replace the sending unit check the wires. call it good.
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I have run both, mechanical is definitely more accurate, but needs a stainless braided line ($$$)
Daniel
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Like said be fore double check your wiring but I could be possible that ur gauge mite be going out. I had a bud run a mechanical gauge and instead of the plastic tubing he ordered the copper tubing and it worked great. I would prefer a electric gauge my self.
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Put a tee on the port out of the block and run both just run copper to the mech
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electrical here. i dont want oil running all over the boat. im not running a 1000hp race motor. i mostly just want to know if i have pressure or not.
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That's Why I love this Dam site!! You guys always come through for people that ain't sure, Thanks for all feedback. I definitely don't have no race motor and just want to make sure I have oil pressure. Guess I will buy a new gauge and try that before Trying a mechanical.
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That's Why I love this Dam site!! You guys always come through for people that ain't sure, Thanks for all feedback. I definitely don't have no race motor and just want to make sure I have oil pressure. Guess I will buy a new gauge and try that before Trying a mechanical.
if you have a gauge right now, take the sender wire and ground it. the gauge should do a full sweep. if the gauge works then you might have a faulty sender (just because its new, doesnt mean its good) or it could be the wrong ohm rating for the gauge. make sure the 12v and ground is good. a boat isnt like a car where you can just run it to anything metal, having good grounds are VERY important. also the sender works through a ground, so if you slap a buttload of teflon tape on it (it should be a NPT thread and should seal itself when tight) it could give you a faulty reading as well. when the ignition is on, the gauge should zero itself out, and obviously when running it should move around with the rpms.
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When I pull the sending wire and ground it the needle does top out. when I turn the ignition to the on position the gauge doesnt zero out but rises half way. How would I tell what sending unit to buy for my gauge? I bought a brand new sending unit last week and was doing this, bought a new one yesterday making sure it was for a gauge and still doing the same dam thing. its frustrating because its the last thing to check of the list before starting interior.
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When I pull the sending wire and ground it the needle does top out. when I turn the ignition to the on position the gauge doesnt zero out but rises half way. How would I tell what sending unit to buy for my gauge? I bought a brand new sending unit last week and was doing this, bought a new one yesterday making sure it was for a gauge and still doing the same dam thing. its frustrating because its the last thing to check of the list before starting interior.
what brand of gauge?
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AutoMeter
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Just run an idiot light with a 10psi switch. When the oil pressure drops below 10psi the light will come on. If all you want to do is make sure you have pressure