Rotax Engine Forum (20)

Featured Discussions

Welcome to the Rotax Engine Forum!

Welcome to the Rotax Engine Forum!  We invite our members with Rotax engines, and those with interest in Rotax engines, to post their quest…

Started by John AustinLatest Reply

Discussions Replies Latest Activity

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

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

6 Apr 9
Reply by Jan Eggenfellner


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

Coolant overflow bottle

The Zenith 912 FWF kit comes with a coolant overflow bottle that looks to me like a medical irrigation bottle, but the published installati…

Started by Jim and Amelia Isaacs

9 Jan 17
Reply by Jim and Amelia Isaacs

Oil tank vent/purge

I’m installing the engine and the manual depicts a hose connected from the vent fitting on the tank neck simply dropping down to an exit ar…

Started by Jim and Amelia Isaacs

3 Jan 11
Reply by Shay King

701 Ring mount water pump outlet clearance

Just uncreated my new 912 and installed the ring mount, but the lower left water pump elbow sits too close to one of the ring mount bracket…

Started by Jim and Amelia Isaacs

14 Jan 6
Reply by Jim and Amelia Isaacs

912 Radiator brackets

I just hung the engine and mounted the coolant radiator using the brackets supplied in he Zenith FWF Kit. Straightforward, but after steppi…

Started by Jim and Amelia Isaacs

1 Jan 1
Reply by Jim and Amelia Isaacs


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