Rotax Engine Forum (24)

Discussions Replies Latest Activity

Rotax 912 ULS Installed Weight

A friend of ours is about to install a Rotax 912 ULS in his Zenith CH750 STOL. The firewall forward kit is the standard package from Zenith…

Started by Oliver Reik

7 Nov 14
Reply by Walt Snyder

912 install on a 701

It's time to start the install of the 912 to my 701. I purchased the engine from my uncle after he tore his plane off the trailer while hau…

Started by Vance Simons

2 Jul 23
Reply by Vance Simons

Add-ons to Rotax could be pricy?

I have found at the Rotax site price for 912U:LS as much as $6500. But they charge another $140 for second throttle. The cab heat manifold…

Started by Eugene Shtirlits

2 Jul 20
Reply by Eugene Shtirlits

Carb icing issues

HI All Has anyone encountered engine vibration on days with high relative humidity after descending from 4500 feet +? to about 1000' agl?…

Started by Herb Hornig

4 Jul 15
Reply by Herb Hornig

Electroaire Switches

Zenith supplied an Electroaire combination "mag" starter switch unit with my 701 kit. This is because Rotax no longer wants you to use the…

Started by Thomas Heiting

1 Jul 2
Reply by Jim and Amelia Isaacs

Charging issue

So about 2 weeks ago I was flying along and started having an intermittent low volt light come on with a drop in the voltage to just above…

Started by Charles Clayton

3 Jun 12
Reply by Charles Clayton

Don’t fret...

I recently noticed a damp patch on top of my Rotax 912uls engine while doing a preflight check. I couldn’t see any obvious source of the le…

Started by Shay King

6 Apr 16
Reply by Ken Ryan


Hi, thanks for accepting the group. I am new at this group. I am finishing up my STOL CH 750 with a Rotax 914 turbo engine. I want to know…

Started by Juan Carlos Abusada

0 Mar 12


I’m curious as to what people think should be the fuel to use in the 912 (ULS) and then what they actually do. I’ve been using the highest…

Started by Paul Sanders

5 Feb 13
Reply by Bob Hartunian

Electrical questions

Anyone out there able and willing to talk how they wired, switched, and protected their external voltage regulator on their 912? If so plea…

Started by Jim and Amelia Isaacs

0 Feb 12


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