Temperature sender

[Bill1]

I would like to buy a temperature sender for may mercury 2001 50 hp, the one that sends the degrees to a gauge. What is the right name for this one, I wouldn't like to order the sender that sends a signal to the alarm.
Can someone help me.
Thanks

Bill1

 

[sschefer]

Re: Temperature sender

I would like to buy a temperature sender for may mercury 2001 50 hp, the one that sends the degrees to a gauge. What is the right name for this one, I wouldn't like to order the sender that sends a signal to the alarm.
Can someone help me.
Thanks

Bill1

Temp sender is the correct name. The one that sends the sig to the alarm box is called a temp switch. Teleflex sells a outboard kit that I use. It comes with a sender, gauge and some mounting options. Merc V-6's have a couple of mounting locations but I'm not sure about yours.

 

[Bill1]

Re: Temperature sender

Thanks Sschefer, I'm prety sure that this will help me, I will look for the sender You are refering to me. I haven't look at the motor lately, but I think I saw the receiver for the sender very close to the top cylinder.

 

[Texasmark]

Re: Temperature sender

Temp gauges usually operate off a sealed tube of liquid and a curved bellows. Temperature applied to the sensor at the engine causes the fluid in the tube to expand which increases pressure on the bellows to which the gauge needle is attached causing the bellows/needle to deflect.....actually straighten out somewhat.

My engine has a 1/8 brass pipe plug in the water jacket cover on the rear of the block where you could insert the sensor. Be careful with the tube and don't kink it or mount it where vibration can cause a hole to be rubbed in it.

Mark

 

[Bill1]

Re: Temperature sender

Thanks Mark, I will be carefull on that.
Bill1

 

[Silvertip]

Re: Temperature sender

Temp gauges that use the Bourdon tube principle are not generally used on boats as the long run of sealed tube from the engine is prone to damage and would be expensive as well. Besides, on an outboard that tube would need to bend and would soon fracture. Marine temp gauges are electrical with the sender being a variable resistance device that varies from 30 - 240 ohms depending on temperature. The gauge and the sender must match so buy the two as a kit. Teleflex and Faria both have what you need. Just make sure you get one for an outboard. And just so you know, you cannot use an automotive temp gauge with an outboard sender.

 

[Texasmark]

Re: Temperature sender

Temp gauges that use the Bourdon tube principle are not generally used on boats as the long run of sealed tube from the engine is prone to damage and would be expensive as well. Besides, on an outboard that tube would need to bend and would soon fracture. Marine temp gauges are electrical with the sender being a variable resistance device that varies from 30 - 240 ohms depending on temperature. The gauge and the sender must match so buy the two as a kit. Teleflex and Faria both have what you need. Just make sure you get one for an outboard. And just so you know, you cannot use an automotive temp gauge with an outboard sender.

Glad you clarified that Silver. I never saw a marine one like you mentioned, but have used the fluid types in farm and roadworthy vehicles for a very long time. Does make a lot better sense to do it electrically in a boat.

Mark

 

[Silvertip]

Re: Temperature sender

They aren't even used in cars/trucks anymore and haven't been for decades because the ECU requires an electrical temp reading to properly set the engine operating parameters. Industrial equipment may still use them but I would doubt it.

 

[Texasmark]

Re: Temperature sender

They aren't even used in cars/trucks anymore and haven't been for decades because the ECU requires an electrical temp reading to properly set the engine operating parameters. Industrial equipment may still use them but I would doubt it.

Well that just shows you how long it has been since I had to fool with one. Kids are all grown now and my fingernails are clean. But I have had to change a couple out in the near past on old farm equipment.

Mark

 

[Bill1]

Re: Temperature sender

Thanks Silvertip, I wil actually order tomorrow one kit, but I have the gauge olready I wish it would the the coreect ahms.