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Does not sound normal, here there are several YS 63's and the typical prop
most use is the APC or Bolly CF 13x6, running between 10-11k on Magnum #1.<br>
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Ray Morton<br>
<br>
HARRY LAWTON wrote:<br>
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<div>Hi All, I have a YS 63 FZ. I have run 3 gals. of YS 20-20 fuel through
it using a 12x6 APC prop. The best RPM I can get is 7,900. Is this normal
or should I be getting more RPMs. Any suggestions? Thank you. Harry
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