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RotaxEngines-List Digest: 2 Msgs - 06/26/10

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dandpy(at)bellsouth.net
Guest

Posted: Sun Jun 27, 2010 3:04 am Post subject: RotaxEngines-List Digest: 2 Msgs - 06/26/10

Hey guys,



I tore my engine down for a sprag clutch replacement last Winter.

Everything is

running top notch now, except this damn tachometer.  It reads steady from 0

to 4k, then beyond that it runs straight to 7k.  Literally, I can move the

throttle

1 mm past the 4k point and WHAM, 7k.  The engine sounds perfectly normal,

so I'm sure it's not actually at 7k (pretty sure it would tear itself apart

and make one hell of a racket).  Any ideas?  It's a Rotax 912 ULS on a

Kitfox

5 .. and I'm stumped.  Anybody run into this before?  Thanks!



Carl

Carl,



I had the same problem and it required a resistor on the ground line.  I

forgot the resistance required, but it solved the problem.  I verified the

reading was correct using a prop tach.



Dan

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