G'day Everyone,

I have a 912UL in my newly acquired Mk1V 1050 with a oil temp sender that is not working. It runs to a Westach 4 in 1 gauge. The sender is the type with the two wires coming out of it. The sender is located in the forward sump plug position instead of up next to the oil pump where Rotax intended them to go. Is there any advantages/disadvantages of just replacing the one in it's current position or should I try to source one that'll fit up next to the pump instead ?

Can anyone give me a brief run down on how a two wire sender works vs a one wire sender. Neither of the two wires seem to run to earth, although I did have a little trouble tracing them among the other wires bundled up. I'm thinking this sender just has power coming in and the resisted power coming out to the gauge, no earth until in the gauge ? I'm guessing the two different types aren't interchangeable and are gauge dependent.

Cheers, Glenn