10 degree fluctuation on oil temp

[Scott]

My oil temp fluctuates about 10 degrees all the time. Its not really a problem unless its a hot day departure and I get up near redline on the climb.
The temp changes about every 3-5 seconds.

Is there anyway to smooth this out?


Scott

 

[Roger_Lee]

If you have a Rotax with a spade style connector it needs to be squeezed down more. If they get a little loose they can swing back and forth as much as 10F-40F

 

[Scott]

I have a IO520

 

[dynonsupport]

Generally these end up being an intermittent connection, and on occasion a bad sensor.

 

[Scott]

I will verify the connection on the sensor again.

I will also pull the plug out of the ems and see what the pin crimp looks like.

Is there any test I can do to the sensor other than buying a new one?

Scott

 

[dynonsupport]

Actually, this is almost always a bad ground between the engine and the EMS. You have to have a really, really good ground to get accurate readings.

--The other Dynon support guy

 

[Scott]

none of the other sensors do this?

still think its a bad ground?

 

[dynonsupport]

Yes. Oil temp, when warm, is much more sensitive to ground issues than any other sensor.

It's technically the alternator current running through the resistance in the ground that causes a voltage offset, not the pure resistance. The variance you see in the sensor is due to the current changing and varying the temperature error.

 

[Scott]

OK, I will clean up the engine ground.

thanks,

Scott