Can anyone help me with this control panel guage Issue

Aug 7, 2025
7
Beneteau 393 BOHM
I have a 2005 Beneteau 393 and cannot read what this is. I was out today and the red light came on and I’m not sure what it is.
The 1st pic is the gauge. In question it is the 2nd gauge on the left on the 2nd pic.
 

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Jan 4, 2006
7,303
Hunter 310 West Vancouver, B.C.
The gauge you show is the water temp gauge as the scale is not linear. Oil gauges are linear. Here's mine shown below :

1754584831710.png


If you've got a red light as well, you've got your work cut out for you.
 

jssailem

SBO Weather and Forecasting Forum Jim & John
Oct 22, 2014
23,392
CAL 35 Cruiser #21 moored EVERETT WA
You may be able to use a plastic cleaner to polish the lense so that you can read the gauge.
Exposure to UV light and marine air has fogged the lense.

I use the stuff from an auto shop. It is used to polish car headlights. Lasts for a season.
 
Jan 4, 2006
7,303
Hunter 310 West Vancouver, B.C.
Can you elaborate on your response.
Maybe it does need a little more elaboration than what I've supplied so far.

You showed a picture of a gauge which we identified as your engine's temperature gauge.

When you mentioned that :

the red light came on and I’m not sure what it is.
....................... I assumed that there was a connection between the gauge and the red light visual alarm i.e. you were getting a high temperature engine alarm which is a most unwelcome event which has to be solved and corrected ASAP.

For openers, make the gauge a little easier to read by wiping the face with soapy water. Next, run your engine while tied to the dock and watch what the temp. goes up to. If it stays around 170 - 180 you need to apply more load. Take the boat out and load up the engine and watch for overheating.

If you're comfortable trouble-shooting an overheating engine, start digging and let us know what you find. If not, maybe some more elaboration before you get into trouble.
 

colemj

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Jul 13, 2004
678
Dolphin Catamaran Dolphin 460 Mystic, CT
I don't think that is the temp gauge. I think the temp gauge is the far right one. Maybe it is oil pressure with two different units?

Give us a better picture, or clear up the lens, and tell us what light is coming on and where - a light on the gauge, or the panel?

Mark
 
Jun 21, 2004
2,954
Beneteau 343 Slidell, LA
I have a 2005 Beneteau 393 and cannot read what this is. I was out today and the red light came on and I’m not sure what it is.
This is a “WAG”, from left to right:
1. Fuel level guage
2. Unknown
3. Oil Pressure
4. Hour Meter
5. Water temp
What other gauge would be included, alternator output??
 
Jan 7, 2011
5,705
Oday 322 East Chicago, IN
OP will need to get some Better photos for us to help him, but I do think it is an oil pressure gauge.

Far right gauge scale is 3-digits, so I am thinking water/engine temp.
Next one is engine hours
Next one looks like it has same numbers on both side of the scale..so I think some sort of electrical gauge (volt meter)
Far left looks like fuel gauge…

So that leaves oil pressure. At least that is my guess.

Greg
 
Aug 7, 2025
7
Beneteau 393 BOHM
This is a “WAG”, from left to right:
1. Fuel level guage
2. Unknown
3. Oil Pressure
4. Hour Meter
5. Water temp
What other gauge would be included, alternator output??
Ok so I have figured out the order of the gauges. I the engine and gauges are Tamar. Left to right. LTR. Fuel, oil pressure(not original gauge), AMP, HOURS, Temperature

attached is the oil pressure gauge which is sitting at three on the upper scale and 60 on the upper scale when the engine turns on. This is the picture still not the best showing the light on.
 

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Aug 7, 2025
7
Beneteau 393 BOHM
Ok so I have figured out the order of the gauges. I the engine and gauges are Tamar. Left to right. LTR. Fuel, oil pressure(not original gauge), AMP, HOURS, Temperature

attached is the oil pressure gauge which is sitting at three on the upper scale and 60 on the upper scale when the engine turns on. This is the picture still not the best showing the light on.
Yanmar (I hate spell check). Lol
 

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Aug 7, 2025
7
Beneteau 393 BOHM
I don't think that is the temp gauge. I think the temp gauge is the far right one. Maybe it is oil pressure with two different units?

Give us a better picture, or clear up the lens, and tell us what light is coming on and where - a light on the gauge, or the panel?

Mark
Yes you are right it is the oil pressure. See a thread below with more details. Thoughts.
 

jssailem

SBO Weather and Forecasting Forum Jim & John
Oct 22, 2014
23,392
CAL 35 Cruiser #21 moored EVERETT WA
Red light means the gauge setting is set to warn when oil pressure (assuming that is the gauge) is too HIGH or too LOW.

Low oil pressure is an indicator of a lack of oil, or perhaps a clogged oil pick-up. Check for volume with the dip stick. Too much oil can be as harmful as not enough.
 
Aug 7, 2025
7
Beneteau 393 BOHM
Red light means the gauge setting is set to warn when oil pressure (assuming that is the gauge) is too HIGH or too LOW.

Low oil pressure is an indicator of a lack of oil, or perhaps a clogged oil pick-up. Check for volume with the dip stick. Too much oil can be as harmful as not enough.
Yep I check the oil level and it was perfect. Still scratching my head.
 

jssailem

SBO Weather and Forecasting Forum Jim & John
Oct 22, 2014
23,392
CAL 35 Cruiser #21 moored EVERETT WA
If the oil level is perfect and the gauge is saying no, then perhaps the gauge is bad?
Replacing the gauge is easier than examining the oil lines. Be sure to get one that works with your oil pressure sender.
 
Feb 26, 2004
23,086
Catalina 34 224 Maple Bay, BC, Canada
Assuming the engine was not running in the photo, the fact that the oil pressure gauge is reading pressure may indicate a bad sensor.

Greg
Sometimes gauges will stay in position when the ignition switch is turned off until the engine is restarted when the gauges will start reading from their zero positions again.
 
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Jun 11, 2004
1,806
Oday 31 Redondo Beach
Sometimes gauges will stay in position when the ignition switch is turned off until the engine is restarted when the gauges will start reading from their zero positions again.
Very good point.
I noticed the red light is on in the picture so assumed his ignition was on and see the needle is at 3. So again assumed that was what he was talking about as the base line reading before the engine was started.
I know, too many assumptions.
 
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Jan 4, 2006
7,303
Hunter 310 West Vancouver, B.C.
Seeing as how you can see the needle of this gauge with the silver bezel :

1754690263417.png


....................... and the thought is that it's the oil pressure gauge, please do us a favour and fire up the engine when cold from sitting overnight and let us know where the needle sits within a few seconds of the engine starting. It should immediately jump to the operating oil pressure. A temperature gauge, on the other hand, will take 5 - 10 minutes to get to operating temperature. Please also check that gauge #5 does take 5 - 10 minutes to come up to operating level. This eliminates all assumptions.

Seeing as how your #2 gauge has a nice shiny surface on the lens and yet is still cloudy, it shows the acrylic is fried through and through and cannot be repaired. VDO gauges are tops in reliabililty and not expensive as replacement gauges.
 
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Aug 7, 2025
7
Beneteau 393 BOHM
Assuming the engine was not running in the photo, the fact that the oil pressure gauge is reading pressure may indicate a bad sensor.

Greg
The engine was running at the time. I do think it is a bad sensor. It is not original, someone before us must have replaced it. My next step is to check the connections and do a meter read on it.