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06-05-2011 06:24 PM  9 years ago
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tacohd86

rrApprentice

Imperial,Missouri-Un ited States

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YS Engine Problems
Is it just me or does anyone else have problems with YS motors breaking crankshafts in mid flight.(see attached pic)I broke one on a 91ST, one on a 91SR and now just this weekend one on my new 56SR.All happened in mid flight.I'm sure that I'm not over tightening the flywheel I put my flywheels on as tight as I can get by hand without locktite and then put locktite on the nut and tighten it to snug and then just a little bit more.Motors turn over freely and crank easily with the starter motor.Any help on this subject is appreciated and does anyone know the warranty time limit on YS motors.I bought it on 11/30/09,about 1 1/2 years ago.

"Fly it like you stole it"
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06-05-2011 07:14 PM  9 years ago
WJackson

rrElite Veteran

Smyrna, Delaware

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The warranty its one year from date of purchase. I haven't heard, nor seen any problems with the 91, but have seen reports of a few 56 cranks. Call Richard and see what he says, can't hurt. Sorry about your motor, frustrating I know.RIP Roman
Bill Jackson
AlignUSA
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