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Rotax 912iS
Hi all
I'm building a KF-IV 1200 that I got second hand. The kit came with a Rotax 912 FWF package.
I recently got a Rotax 912iS brand new. does anyone have any experience with the iS?
Will the engine mount fit?
I'm sure I don't need all the parts in the 912iS FWF package KF is offering but what part do I need?
Ofer G.
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Super Moderator
Re: Rotax 912iS
I think this is going to be a John Mcbean subject.
These are so new, he's the only one whose done an install of this motor on a Kitfox...
Av8r3400
Kitfox Model IV
The Mangy Fox
912UL 105hp Zipper
YouTube Videos
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Senior Member
Re: Rotax 912iS
Sitting here at Gary's Oyster Bar near Sun N Fun. I showed the post to my Kitfox guru friend and his answer was "Won't fit".
Last edited by HighWing; 04-13-2013 at 05:38 PM.
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Super Moderator
Re: Rotax 912iS
Maybe not with an oem kit (today), but if it can be done and recorded, it's a moneymaker!!
Av8r3400
Kitfox Model IV
The Mangy Fox
912UL 105hp Zipper
YouTube Videos
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Senior Member
Re: Rotax 912iS
John has a ring mount for the IV that should fit, but the stock cowl will have to be extended forward. Not a big challenge. I did it on my current IV. I mounted the top and bottom cowls as far forward as possible and added a couple of in inches of glass to the aft to the ring cowls.
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Senior Member
Re: Rotax 912iS
I am out of the country on business.. We all know anything can be done.. Putting the iS on the Model IV will be difficult and there is a lot to consider. Ring mounts are easy and the cowlings can be done but effects on W&B, where to locate fusebox, ECU, Fuel Pumps, etc.. Not impossible by any means but
trust me, there is more to that install then meets the eye.
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Super Moderator
Re: Rotax 912iS
Thank you for the input, John. Your experience with the 912iS install to an SS will be invaluable if this project continues and I hope it does.
CG issues and strategic placement of battery, pumps, and other specific equipment will, most definitely, be important
Av8r3400
Kitfox Model IV
The Mangy Fox
912UL 105hp Zipper
YouTube Videos
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Re: Rotax 912iS
Thanks for your replays
My plan is to put the pumps behind the seats next to the header tank and put all the electronic boxes on the cold side of the firewall so I can put the engine as close to the firewall (for CG reasons).
I have the round cowl so it won't be a tight fit.
Hope it will work.
Thanks again
Ofer G
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Super Moderator
Re: Rotax 912iS
Remember, The engine mount with the oil tank in back (regular round cowl model IV mount) will not work with the iS motor. The intake manifolds can't be reversed for clearance. Highwing mentioned a "Ring" mount, converting to that is not an option.
Av8r3400
Kitfox Model IV
The Mangy Fox
912UL 105hp Zipper
YouTube Videos
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Re: Rotax 912iS
I believe the 912is comes with the ring mount installed just as my
914 did. The new mount will interface with the Rotax ring. W&B
can be taken care of by placement of accesories. The model 4
with 220 pounds of radial required the battery and 5 pounds of lead
at the back. The plane still flys very nicely. The 912is install should
be much easier to achieve correct W&B. I think this type of conversion
will be very popular in places with very high fuel prices. Please keep
us updated on your project.
Phil
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