Oil Pressure guage with light built in
12-08-2009 | 12:42 PM
#1
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From: Mississippi
Oil Pressure guage with light built in
Need some help, I have a Gaffrig oil pressure guage with built in indicator light in my 2001 fountain 35, at 3000 rpm it shows about 30 psi no light. anything above 3500 rpm the oil pressure guage jumps from 15-35 psi and the light in the guage comes on, but it also has another horn and light that is connected to another switch so I don't think it is loosing oil pressure. my question is if the guage pressure never falls below 15 psi how does the the guage know that the boat is not just at idle. does the oil pressure guage have an input fron the tach to tell it that at this rpm it should have a certin amount of pressure. Bottom line, what turns the light on in the oil pressure guage. when the key is turned on and motor is not running the light will come on, this tells me that no pressure turns the light on. does it have a set point.
Last edited by racer-x6; 12-08-2009 at 12:44 PM.
12-08-2009 | 03:43 PM
#2
Ginger or Mary Ann?
Joined: Oct 2000
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From: L
The dash oil pressure gauge is independent. Not tied into the tach. The red gauge indicator light is lit from a zero reading from the gauge itself. It has no seperate input for the lite itself. If the lite comes on with a pressure reading, I'd say the gauge is faulty. Exspecially since the gauge bounces 15-35. I'd think the sender is fine since the light lites up with pressure.
Just swap the signal leads on the guage from PT motor to SB motor to double check.
Just swap the signal leads on the guage from PT motor to SB motor to double check.
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Some people are like Slinkies - Not really good for anything, but they
bring a smile to your face when pushed down the stairs.
Some people are like Slinkies - Not really good for anything, but they
bring a smile to your face when pushed down the stairs.
12-08-2009 | 03:48 PM
#3
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From: Mississippi
The dash oil pressure gauge is independent. Not tied into the tach. The red gauge indicator light is lit from a zero reading from the gauge itself. It has no seperate input for the lite itself. If the lite comes on with a pressure reading, I'd say the gauge is faulty. Exspecially since the gauge bounces 15-35. I'd think the sender is fine since the light lites up with pressure.
Just swap the signal leads on the guage from PT motor to SB motor to double check.
Just swap the signal leads on the guage from PT motor to SB motor to double check.
12-08-2009 | 04:19 PM
#4
Ginger or Mary Ann?
Joined: Oct 2000
Posts: 11,030
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From: L
Might give Livorsi a call. NOt sure if they can repair them or if they just swap out the insides. I'd think they could simply reinstall your face plate on a new gauge if all else?? I've also bought a replacement off them to stay with the Gaffrig label. Didn't want a single 'Livorsi' labeled gauge They still had some of their original Gaffrig labeled gauges in stock. Been a couple yrs ago though.
__________________
Some people are like Slinkies - Not really good for anything, but they
bring a smile to your face when pushed down the stairs.
Some people are like Slinkies - Not really good for anything, but they
bring a smile to your face when pushed down the stairs.
Last edited by US1 Fountain; 12-08-2009 at 04:22 PM.
12-08-2009 | 06:28 PM
#5
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From: Omaha/LOTO
I've had to replace a few of my Gaffrig(Livorsi) redline guages because of simlar issue. Gauge would go a little crazy and the warning light would come on. Turn the key off and restart and all would be fine. I got some replacements off ebay.
