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815TL
Joined: 10 Oct 2008
Posts: 62
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 Posted: Fri Jan 23, 2009 12:43 pm Post subject: Magnito/RPM wierdness. Any ideas? |
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Hey all. My instructor and I tried to take the plane up this afternoon, so I could get some time in, but we ran into a snag. He was not comfortable taking it up until we get it figured out.
On run up, we would turn off one mag at a time to check them. Turning off the left mag would indicate a drop of about 50RPM, and we could also hear it and feel it. But when we would do the right mag, it would indicate a 500-800RPM INCREASE. Now we could feel and hear a slight drop, probably 50-100RPM, just like the left. But the indication would say a huge increase.
The last time I had the engine running, the mags worked and showed fine.
This is a Rotax 582 model 90 by the way.
Any ideas on this?
Andrew
815TL, Kitfox II, Rotax 582-C
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Tom Jones
Joined: 12 Mar 2006
Posts: 752
Location: Ellensburg, WA
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| Posted: Fri Jan 23, 2009 4:12 pm Post subject: Re: Magnito/RPM wierdness. Any ideas? |
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I tried a mag check once with the master switch off. It did something like you experienced. Turned the master on and the mag check was normal.
As mentioned earlier, I would check all the ground wires carefully, a loose ground can cause some weird conditions in the two strokes.
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_________________
Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA |
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