I always suggest rotax people first spin engine with starter THEN turn ignition on a second later and this helps protect Sprague clutch. Some versions you can not do this without modifications.
Ian McPhee 0428847642 Box 657 Byron Bay NSW 2481 On Thu, 2 Aug 2018 17:57 Rob Thompson <[email protected]> wrote: > G'day All, > Do any of you with Rotax motors have any experience with adding a soft > start circuit to the ignition? > > For the benefit of the non-rotax DOG people, the rotax ignition system > creates two sparking points.... one normal timing and one retarded for > starting. Zener diodes are supposed to filter out the first spark at > cranking speeds but often it doesn't - resulting in the engine stopping > dead when cranking. > > I think maybe the simplest option being a couple of diodes that are > switched in when the starter button is pressed and then disengaged when the > button is released. I suspect the Rotax module may be big buck$ for what is > probably a a very basic circuit. > > regards > Rob > > Rob Thompson > 0429 493 828 > (Please note that my new email address is [email protected]) >
