Lowengrynn
Cadet
- Joined
- Nov 29, 2011
- Messages
- 20
Hi Folks,
I am in the process of bringing this 70 up to scratch and re-doing some of the things undone by the previous owner.
One of those things is getting the (I believe) OEM temperature gauge to work again.
I have found a (loose and taped) tan wire near the red plug that, when shorted to earth, flicks the gauge up, so the gauge works. Good too, because it's a smart unit.
I also found the stub of a broken bracket under a bolt on top of the engine, which suggests a head temperature sensor has been used a some point, and then snapped off, but this may be wrong.
So, out-of-the-box, did the 70's of this age come with a sensor plug through to the water jacket, or can I make one, or do I use a head sensor? Given a choice I'd measure the water, but not at the risk of drilling holes in the wrong place.
Any and all thoughts very much appreciated.
Also, if I have to buy a sender for the head without recourse to knowing what sender the gauge was intended for, do I get one with the widest resistance band ike 10-312 ohm, or a narrower one, say 23-240? I know that the gauge will probably never read the right temperature again, but I could get used to looking and seeing that the temperature shown, though not right, is 'normal'.
G'day
Low
I am in the process of bringing this 70 up to scratch and re-doing some of the things undone by the previous owner.
One of those things is getting the (I believe) OEM temperature gauge to work again.
I have found a (loose and taped) tan wire near the red plug that, when shorted to earth, flicks the gauge up, so the gauge works. Good too, because it's a smart unit.
I also found the stub of a broken bracket under a bolt on top of the engine, which suggests a head temperature sensor has been used a some point, and then snapped off, but this may be wrong.
So, out-of-the-box, did the 70's of this age come with a sensor plug through to the water jacket, or can I make one, or do I use a head sensor? Given a choice I'd measure the water, but not at the risk of drilling holes in the wrong place.
Any and all thoughts very much appreciated.
Also, if I have to buy a sender for the head without recourse to knowing what sender the gauge was intended for, do I get one with the widest resistance band ike 10-312 ohm, or a narrower one, say 23-240? I know that the gauge will probably never read the right temperature again, but I could get used to looking and seeing that the temperature shown, though not right, is 'normal'.
G'day
Low
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