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S1 Switch Function (Auto Start) 003a

ckesey

Member
43
5
8
Location
Tennessee
I would attach it to the cylinder head. You could also just go off of timing, for example 30 sec preheat, if it fails to start go for a longer preheat.

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Most of the temp sensors (metal) I have found go up to ~250f which I'm guessing would be high enough but I worry a little about the wire that goes to the sensor...if I can get it out of the way or wrap it it something to protect it from the higher temperatures.
 

Scoobyshep

Well-known member
924
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93
Location
Florida
Most of the temp sensors (metal) I have found go up to ~250f which I'm guessing would be high enough but I worry a little about the wire that goes to the sensor...if I can get it out of the way or wrap it it something to protect it from the higher temperatures.
Back in the day, I used to race stockcars and gokarts, on the karts we had a head temperature sensor that was held in place by the spark plug, you could use one of these sensors under a glow plug(end of the day its a simple thermocouple) . They used to sell the sensors separately from the tach module (google digitron tach).

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DieselAddict

Well-known member
Steel Soldiers Supporter
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Location
Efland, NC
Agree that head temp is the better place to monitor. You can find thermocouples that are shaped to go under bolt heads. Very common in aviation. You'll need a bit more circuitry to read a thermocouple but your autostart will work better. The 003s start well when they are adequately preheated. They don't start at all if they aren't.
 
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