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Old 01-01-2015, 03:03   #1
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Temp and Oil Pressure Gauges Reading Zero

I'm an admittedly ignorant, new owner of sailboat boasting a 20 year old Yanmar, three cylinder, 27 hp diesel. The diesel seems to run fine, and may have been rebuilt in the past.

However, both the temperature gauge and the oil gauge read zero at start up and after running for up to half an hour. Apparently, this is an electrical problem, and may be as simple as a blown fuse or two, but I do not know where to look for such an items and what they might look like on a 12 volt system.

Any advice, photos, or links would be greatly appreciated.

Regards to all,

G2L
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Old 01-01-2015, 04:21   #2
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Re: Temp and Oil Pressure Gauges Reading Zero

Easy to trace the wires from the gauges down to the engine, or find the sensor plugs on the engine and trace the wires back to the gauges. Look for loose or corroded connections on the sensor plugs. Be aware that gauges and sensors need to be matched to each other.
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Old 01-01-2015, 05:08   #3
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Re: Temp and Oil Pressure Gauges Reading Zero

See posts 1 & 2 ➥ Basic Engine Gauge Theory and Testing
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Old 04-01-2015, 01:46   #4
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Re: Temp and Oil Pressure Gauges Reading Zero

Quote:
Originally Posted by homeless View Post
Easy to trace the wires from the gauges down to the engine, or find the sensor plugs on the engine and trace the wires back to the gauges. Look for loose or corroded connections on the sensor plugs. Be aware that gauges and sensors need to be matched to each other.
Thanks; sounds like a no-brainer (just right for me) : )

Regards,

G2L
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