Engine Mounting

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Postby Scott McCarthy » Mon Mar 08, 2004 2:44 pm

Awhile back I sent my engines off to be rebuilt, but it looks like I won't see them for quite some time. So, in the meantime, I bought two, used replacement Rotax 185s. They appear to be in good shape but they were not mounted to the nacelles using the aluminum box and Lord mounts, as mine were. My original engines each had four, 1/4" threaded brass rods screwed into the starter shroud holes in the engine casing. The "new" engines have much smaller starter shroud holes. I'm considering drilling them out, threading them and screwing in either threaded steel rods or plain rods threaded on the ends which will mate them to the nacelles as the old engines were. Do you see any problems with this approach? Has anyone else had this problem? Did UltraFlight have more than one mounting method for the Rotax 185?

Scott
Rhode Island
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Postby Guest » Wed Mar 10, 2004 8:23 pm

What no engines still ?????? Man !

What you are thinking is what you will need to do to make Carels engines work with your nacelles/ mounts/ staters. Hopefully you removed your starter cups from your engines before your sent them to L ! You will need those !
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Postby Guest » Fri Mar 12, 2004 1:33 pm

Carel's engines, fortunately, are complete. And in the interim, I've discovered that quite a few of the older Lazairs have the mounting system that was on his nacelles. Guess I'll just put them together use them.
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Postby Billm » Thu Jul 21, 2005 2:06 pm

OK I'm lost--
I know that somewhere in here someone gave the definitions of what to look for to see if your engines are "heavy-crank" or not.
Anyone tell me where it is?
Thanks
Bill
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Postby daffy1029 » Fri Jul 22, 2005 6:00 pm

Hi Billm,
Check out this web page, www. lazairforce.central5.com There is info about heavy and light cranks here. ;) Daffy
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Postby daffy1029 » Fri Jul 22, 2005 11:10 pm

Hi Billm,
I tried the website above and didn't seem to work. Try this one,
http://www.lazairforce.central5.com/
If you look down the page, it talks about heavy and light crankshafts.
Daffy
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Postby Billm » Fri Jul 22, 2005 11:16 pm

Yes-- Thanks Daffy
That is exactly the site that I remembered, and answers my question.
(Now to find my engines and check them out.
Bill
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Postby Guest » Sun Jul 24, 2005 9:54 pm

Small crank comes out case and sharply tapers down just before prop hub. Large crank has ring groove around shaft just outside of case and does not taper down before hub. Easy to tell difference.
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