Help with locating drive temp sender and/or Yacht safety center problem

[zigzag930]

On my 58LRC, I received an alarm on the Yacht Safety Center that says "stbd drive temp", when the engine is cold and hasn't even been running. I does not go away when I start the engine. Clearly there is a problem with the alarm as the drive temperature is at ambient air temperature of about 70 degrees. (sorry for you guys up North).

Anyway, I am not sure which is the sending unit for this alarm. I'm guessing a corroded wire or loose connection on the engine.

I've attached two photos in case anyone can tell me if either of these picture shows the sender. Please don't raz me about the necessary clean-up on the engine. It's on the list.....

BYW, these are DD-471's

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[oscarvan]

First one looks like a pressure sender to me......

[Scarlett]

2nd one looks like my digital tach sender. John

[Briankinley2004]

I would check with Sams. I had a transmission sensor on my ZF's go bad. I looked up the part number and called the manufacturer. They said they don't sell direct but they did have one approved vendor. It was Sam's Marine. $225 later I had the issue fixed.

[zigzag930]

Ok, so it looks like picture one is the drive pressure gauge. When I disconnect the positive wire the driver pressure gauge pegs.

There aren't any screw type terminals on the other sender. There are three pairs of crimped connections. I may have to cut the wires to see what gauges are effected, but was hoping to identify it first.

Sams sent me a picture of what they say the driver sender should look like. I can't find anything that looks similar on either transmission.

[Avenger]

Just speculation, since I don't own one of these, but I would expect a temp sensor to be lower on the transmission to measure the fluid in the sump. Or, another possibility is on a filter housing.

[SKYCHENEY]

I'll bet its not the sender causing this problem. Its in the board for the alarm system. To be sure, just jump the wires at the sender. Its simply a NC switch. When it opens, it alarms. So, a broken wire or loose connection will also cause an alarm.

[zigzag930]

Sky, that's what I was planning to do - if I can locate that sender.

Are the system boards repairable?

[oscarvan]

I may have to cut the wires to see what gauges are effected, but was hoping to identify it first.

Whoa....slow down.....

De-power everything and use one of these.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

[SKYCHENEY]

Sky, that's what I was planning to do - if I can locate that sender.

Are the system boards repairable?

Yes, the boards are repairable. Follow the oil lines on the trans and you should find the sensor.