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Old 04-21-2003, 06:27 PM
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Default Second Temperature Sensor as Outboard Temp Gauge?

Reading through the directions for my new Combo GPS/Sonar unit (Eagle SeaCharter 320 DF) it appears that in addition to the temperature reading coming off of the transom mount, I can assemble and configure a second temperature sensor and have that reading displayed with all the other data. This got me thinking...
Could I set up a temperature gauge for my outboard?
It's a year 2000 Merc 125 Saltwater series. At present, I only have three warnings - the low oil beep, high temperature beep, and the visual indicator of the cooling water shooting out the side. This new temperature monitor could display possible trouble long before the damage is done. Not that I'm being paranoid, but just thinking back to putting a new block in a Pontiac a few years ago because the red idiot light was late.
Has anybody else done this with an outboard? Where would you mount the sensor?
Ed

[This message was edited by savage on 04-21-03 at 09:38 PM.]
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Old 04-22-2003, 04:26 AM
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Default Second Temperature Sensor as Outboard Temp Gauge?

why not just buy a sending unit and gauge from merc?
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Old 04-22-2003, 06:21 AM
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Default Second Temperature Sensor as Outboard Temp Gauge?

Are those available??? Checking the mercurymarinepartsexpress site, I see thermostats but not temperature gauge kits.
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Old 04-22-2003, 07:07 AM
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Default Second Temperature Sensor as Outboard Temp Gauge?

you'll either have to call them or talk to a good merc mechanic to see what one to order.
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Old 04-23-2003, 02:40 PM
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Default Second Temperature Sensor as Outboard Temp Gauge?

I took Dad's suggestion and went to chat with the crew at MarineMax. They LOVE the idea, but told me to talk to the manufacturer. They can show me a bolt on kit from Mercury ($345) that would put another gauge on the dash, but that's not what I want.
So I called Eagle's technical support department, and after a few look-ups, it appears that I'm limited to a range of 32.0° to 99.9° F.
This is due to the software inside the unit rather than the capabilities and construction of the auxilary temperature sender. The helpful tech support rep said that issue MAY be addressed in future software/OS updates. So I thanked him, hung up, and then it occurred to me... Centigrade would work within those display limitations.
Checking the Simulator/emulator for the units operation, I cannot find a setting to go from °F to °C. So it appears that I'm out of luck in this regard, at least until the factory issues new software for the unit.
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Old 04-23-2003, 03:45 PM
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Default Second Temperature Sensor as Outboard Temp Gauge?

bummer dude. I guess they never figured you to try fishing in boiling water huh?

You could still mount a separate gauge, even an automotive one will work. Look in Jegs or JC Whitney to see what kind of ideas you can come up with.
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Old 04-23-2003, 04:01 PM
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Default Second Temperature Sensor as Outboard Temp Gauge?

Having a second temperature gage is a great idea! I did the same for my boat, although it is an Evinrude Ficht rather than a Mercury. As I recall the whole kit (BoatUS) cost less than $100, and included the Faria(?) dashboard gage and 25' tubing. The brass fitting for the powerhead was purchased separately. It is easy to install and a great comfort. I now rely on it as the primary reference, especially in skinny waters, although I still watch the pee stream when I look back (some habits are hard to break). Go for it!



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Old 04-23-2003, 04:18 PM
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Default Second Temperature Sensor as Outboard Temp Gauge?

I know Yamaha sells a kit that includes the temperature sender that screws into the engine head downstream from the thermostat, the wire harness and the guage. The only issue is whether the Merc has the same size mounting hole in the head and whether the threads are the same.
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Old 04-23-2003, 04:57 PM
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Default Second Temperature Sensor as Outboard Temp Gauge?

savage...quote:...to 99.9° F. There still may be a use, ya take that 'extra' sensor and hook it up to the Captain, if you know what I mean, and see if he is OK. GOOD Idea?

Boston Whaler, "MUMBLER", 24' Outrage, twin 175 HP Evinrude Ocean Pros. Snowball, the cat...
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Old 04-23-2003, 05:17 PM
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Default Second Temperature Sensor as Outboard Temp Gauge?

The manuals recommendation is to drop one into the livewell, to make sure my shrimps are happy...
Or I could drop one into the cooler to make sure the fluids are cold. It's VERY important to replace fluids out there -- avoid dehydration.
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