Hi Bob,
This is kind of a tough question without guidance from the Mfg or maint. Manual. There are different mounting systems from different Mfg’s. Most of the engines that have come through my shop are anywhere from 175 in/lbs to 200 in/lbs. Some have Nyloc nuts and some have castle nuts with pins.
You may need to reach out to a forum of other Zenith users if the Mfg won’t help.
Maybe someone here will read this and chime in.
Roger Lee LSRM-A & Rotax Instructor & Rotax IRC Tucson, AZ Ryan Airfield (KRYN) 520-349-7056 Cell
Leading Edge Air Foils (LEAF) currently lists the Rotax branded shock mount (860690) for $21.95/ea. Wag Aero, essentially the same company as LEAF lists the Lord mount (J-3608-1) for the same price, $21.95/ea.
I am not sure there is a difference, I believe the Rotax part is just a Lord manufactured part with a Rotax label and part number. But I could be wrong. I just install whatever the aircraft manufacturer requires; sometimes it's Lord and sometimes it's Rotax. But they are the same price either way; at least right now they are from LEAF and Wg Aero.
If anyone knows whether they are the same or not, please chime in.
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