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1. 09:44 PM - Magnetos (Walter Lannon)
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Hi All;
I have a question basically for Richard Goode and George Coy but also
for anyone else interested. It is a result of the following question
to me : ------ =9CCan I replace my M9F magneto on the M14P with a
DZ5 (Chinese) magneto?=9D.
My answer has been a qualified =9CNo, I don=99t think
it=99s a good idea=9D even though I know it has been done
and the reported results are good. This response has nothing to do
with the different timing requirements of a fixed spark mag. VS an auto
advance mag. which I try to explain to the questioner.
To the best of my knowledge there are only four versions of this
magneto: 1. The basic M9 of which the DZ5 is a license built copy
(though, I guess we could call that 2 versions), 2. The M9-25M, 3.
The M9-35M and 4. The M9F. Versions 1 & 2 are auto advance type with
a range of 23 to 27 degs. Version 3 is also auto advance but with an
extended range of 23 to 37 degs. and version 4 which is a fixed spark
magneto with no auto advance mechanism.
The basic M9 (DZ5) to the best of my knowledge is the standard magneto
on various engines with a maximum RPM of less than 2400. The M9-25M and
the M9-35M are approved alternates for the M14P and the M9-35M is the
standard magneto for the M14PF. Much of this is my observation and not
necessarily fully accurate.
Since the M14P and, presumably, the M14PF engines have a much higher
maximum RPM than the earlier versions I suspect that the M25M and the
M35M (in addition to the extended range of the latter) have a different
advance mechanism than the basic M9 (DZ5).
I expect there are different counter weights and/or return spring
tensions involved. Am I right or wrong? If wrong what is the actual
difference between the M9 and the M9-25M?
Have at it guys!!
Cheers;
Walt
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