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1. 07:39 AM - Re: RPM drop Problem (Michael)
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| Subject: | RPM drop Problem |
--> Engines-List message posted by: "Michael" <cubflyr@comcast.net>
>The timing may have slipped on one mag.
That was the first thing to pop into my mind, everything else being checked.
Are the mags new or recently overhauled and reinstalled? Sometimes things
can shift. It would be unlikely for a Woodruff key to be missing, but not
impossible. This would allow a gear to shift. You may have to pull the mags
and check them out, as well as to make sure they are installed with the
timing mark in the correct place on the drive gears. It would be odd for
this to be it as it sounds like it just started after being normal for a
while. Something has moved out of place, most likely in the mags or gear
drive.
I recently put in a new set of ($20 each) spark plugs only to find after
about 20 hours one was faulty. Have them pressure checked. If they are
leaking, you can see blow-by gas products in the wiring harness end of the
plug.
Michael
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