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ContinuousWave: The Whaler GAM or General Area
Temperature Sending Unit?
|Author||Topic: Temperature Sending Unit?|
posted 06-26-2001 10:52 PM ET (US)
The motor: 1990 Johnson 88SPL (on 1977 Montauk).
Returning to dock on Sunday, I noticed that the temperature gauge was pegged. Motor was running smooth as silk - NO indication of overheating other than the gauge ([confidence stream] running strong as ever). I shut her down.
Today after work, I went out to investigate the problem. Put the key in the switch - immediately (before even cranking) the temp gauge jumps into the red. Motor cranked up fine, sounded fine, [confidence stream] running strong. Temp gauge is pegged. I shut her down.
Thanks in advance for your responses.
|Tom W Clark||
posted 06-27-2001 12:57 AM ET (US)
It's most likely the wiring to the gauge, not the gauge or the sending unit. Make sure there is + and - power to the gauge and the sender wire (tan) does not have power running through it.
posted 06-27-2001 09:44 AM ET (US)
Try this as well. Find the temperture sender on the engine and disconnect it. It should have tan wire. The meter should read nothing or very little. If it doesn't you have a defective meter or a short to ground on the sender wire somewhere, possibly right at the meter itself or anywhere along the line.
If the meter reads nothing or very little gound the sender wire to the engine block. Use the head of a bolt or something that isn't painted, the case of the starter should work well. The meter should get pegged. If this happens then you have shorted sender. Replace the sender.
You can do this without the engine running, but with the ignition on. Just make sure you don't start the motor unless you have a flusher hooked up and providing water.
posted 06-27-2001 10:25 AM ET (US)
Thanks, Tom and Sean, for your suggestions - I'll follow both and report back.
Thanks JimH for modifying my original post using the correct term - "confidence stream" - instead of what I was calling it.
posted 06-27-2001 03:34 PM ET (US)
We know all the nicknames for this, but the engineering term is "telltale".
posted 06-27-2001 04:41 PM ET (US)
I am biting my tongue on that one!
|Tom W Clark||
posted 06-27-2001 06:34 PM ET (US)
"confidence stream"?! Did you make that up? Boy, if you've decided to start editing our posts for proper English and spelling you're going to be very busy.
Myself, I prefer the French: pissoir
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