flyerg1000 Posted May 15, 2015 Report Share Posted May 15, 2015 Hello all My left CHT first fluctuates and then drops to low end of range after 10-20 minutes of flight. I am assuming the CHT probe is probably u/s. Can anyone assist with the part # and a place to purchase the CHT for a CTLS, Dynon 180 EMS and Rotax of course. Many thanks Niels Link to comment Share on other sites More sharing options...
FredG Posted May 15, 2015 Report Share Posted May 15, 2015 I am confused. Didn't the OP say CHT and not EGT? On my CTsw, they are not the same sensor. Link to comment Share on other sites More sharing options...
Roger Lee Posted May 15, 2015 Report Share Posted May 15, 2015 Sorry I can't read evidently. First thing is these almost never go bad and the usual cause is a bad connection at the sender or in the 37 pin connector on the D120. The connection at the probe should be firm on the connection and not floppy. The second place these go bad is in the D120 37 pin connector on the back of the D120. There is a 1.2K resistor and sometimes this contact inside the plug breaks. It's and easy fix. Check these two places first before buying a new sender. One way to test the probe is jump across the engine with a wire to the other probe and see if the problem follows the wire or if it really is the probe. The CHT probes are VDO. Rotax wants an arm and a leg for them. Buy them for a fraction of the price on Egauges.com. About $12 Under VDO temperature senders. Link to comment Share on other sites More sharing options...
Runtoeat Posted May 15, 2015 Report Share Posted May 15, 2015 Thanks for the link for VDO equipment Roger. Link to comment Share on other sites More sharing options...
WmInce Posted May 15, 2015 Report Share Posted May 15, 2015 Thanks Roger. Link to comment Share on other sites More sharing options...
Jacques Posted May 16, 2015 Report Share Posted May 16, 2015 make sure you buy the metric threads version part # 323-423 http://www.egauges.com/ProductDetails.asp?ProductCode=323-423 Link to comment Share on other sites More sharing options...
Runtoeat Posted May 16, 2015 Report Share Posted May 16, 2015 Thanks for the metric reminder and part no. Jacques. Link to comment Share on other sites More sharing options...
flyerg1000 Posted May 16, 2015 Author Report Share Posted May 16, 2015 Hello Roger Very timely and useful practical knowledge ! It is encouraging to know the CHT probe is rarely the cause. Many thanks indeed ! Niels Link to comment Share on other sites More sharing options...
flyerg1000 Posted May 16, 2015 Author Report Share Posted May 16, 2015 Hello Jacques Very essential info as well. Many thanks Link to comment Share on other sites More sharing options...
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