acrojim7534(at)YAHOO.COM
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 Posted: Fri Jun 24, 2011 11:30 am Post subject: No Title |
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For you 914 drivers;
My 914 started showing surges in the manifold pressure recently. On takeoff's, the MP would vary from 33" MP to 39"MP. In cruse mode where I normall cruise at 33" MP and 5300 RPM I was having to advance the throttle, or retard, in order to keep the MP stable.
The engine has 860 hours, TT since new...to make a long story short, I have added 3 pictures of the servo cable..Over a period of time, some of the wires in the cable, were broken, or just worn out. The clevis on the end of the cable connects directly to the turbo wastgate, and the worn out cable was just bending, instead of moving the wastegate...
I ordered new cable from Rotax, and installed...Make sure when installing new cable, that the wastgate is completely closed..If its not completely closed, you will not get full bost on takeoff.
Jim Brown
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