912 UL EGT
My EGTs are running 1550 degrees since cold weather ( below freezing)has started. Should I step up main jet a size?
My EGTs are running 1550 degrees since cold weather ( below freezing)has started. Should I step up main jet a size?
by Roger Lee » 10 months ago
We don't have all the info here, but you shouldn't need a new jet. First I'd check to see the slot the needle clip is in. It should be in #3 down from the top. If it's in #2 (leaner) then go to #3 (richer) clip position. If it's in the #3 position then try #4 position and then do a test run. The temp difference should be approximately 80F..
Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell
by Rotax Wizard » 10 months ago
hi Darryl
The EGT in the operators manual lists max 1616 F. This would be at your leanest operational area, normally in the 75% power range. As Roger pointed out this is adjusted by the needle clip position and not the main jet for the most part. Generally number 3 clip position is suitable for all weather conditions. Be sure that you are not just getting a high resistance in the EGT sensor itself, verify that reading is accurate before chasing jet changes.
Cheers
by Rotax Wizard » 10 months ago
Darryl...if you are unsure how to check your EGT this might help. Found this online from Michigan Avionics.
Cheers
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