rhtrudder Posted July 6 Share Posted July 6 Still trying to figure out my engine, switch between the mags below 4000 not much drop, up in cruise, above 5000, the is a big drop on both sides, I know the ignition systems are separate from each other but is there something common to effect both Link to comment Share on other sites More sharing options...
Red Posted July 6 Share Posted July 6 914 is known to have a substantial rpm drop on switching off one ignition circuit What are your numbers? https://legacy.rotaxowner.com/si_tb_info/serviceinfo/si-914-034.pdf 1 Link to comment Share on other sites More sharing options...
rhtrudder Posted July 6 Author Share Posted July 6 In the past if I have left one off I could barely notice the difference but not now , both sides the same, feels like it will cut out, I’ve never come across this information before, can drop up to 500, at 4000 , just found out the 914 runs one side a bit more advanced , I guess to help with detonation, read somewhere the earths off the cdi and coils can corrode, just cleaned them up , fly tomorrow and hope my imagination was the trouble all along Link to comment Share on other sites More sharing options...
facthunter Posted July 7 Share Posted July 7 Don't test mags at high rpm and load as a general rule. Running on one does give some timing retarding effect. IF I have to complete a flight in that condition I enrichen the mixture and cruise at a lower power setting. and try to keep the head temps down.. Nev Link to comment Share on other sites More sharing options...
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