Should I use seperate switches for mags?

[gizmos]

Rotax 100hp three blade prop, should I use two mag switches or use the standard Cessna type key switch/mags?

[Planesmaker]

I would go with seperate switches. Because rotax run AC powered CDI's there has been some problems ( occasionally) with key type switches.

[Av8r3400]

Yes. Two separate switches.

[mr bill]

I like the having ability to turn the engine over without starting it. I use two rockers for ignition and a momentary key switch for starting.

[SkySteve]

A related question: When turning the engine off, do you shut down one mag, then the second, or both at the same time?

[DesertFox4]

Two switches, push button start switch, no key. Both off at the same time.

[jiott]

I read somewhere, probably this forum, that it is a good idea to turn off one mag and wait a second or two, then turn the other off. It slows the idle speed somewhat so the final shutoff is less abrupt; supposed to be better for the gearbox. I have been doing this for several years now and I do believe it gives a smoother shutdown.

[DesertFox4]

I can usually get very smooth shut downs with no abrupt compression stops but that has to do with throttle manipulation during shut down.

[jiott]

DF4, so how do you manipulate the throttle?

[DesertFox4]

This method goes back to almost the first 912uls installed on a Kitfox.

Run up rpms to about 2500 and as you shut off ignition be pulling the throttle back to idle. Takes some practice to get the timing down but most times I can get a very smooth stop. I do have my idle set to about 1400 rpms.