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JPI Slimline Tach reading half rpm

GWZ

Well Known Member
Hi all, I've got a weird problem. I just replaced my LASAR ignition system with a mag and an electroair EI. The JPI tach pickup was attached to the LASAR mag (a big ring terminal with a hall effect sensor held against the mag by putting it under the vent plug). I've tried all the recommended positions and the tach still reads about half rpm. Also I don't have the owners manual for the tach so don't know how to change the setup. It doesn't seem like the setup should need to be changed but....
Thanks, Gunther
 
JPI Tach isssue

well a quick call to Joe at Champion explains all. Seems the LASER mags actually have extra poles (magnets) on the rotor. I have to send the tach back to JPI to have the LASAR mag mod removed.
 
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