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Shaft from my A-4 is 7/8.
Ken Pole
1975 Mark III Santiva
Ottawa
Ken Pole, Ottawa
1975 Mark III Santiva
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I have a 7/8 shaft on my MKlll, with an Atomic 4 engine I use an 11 x 5 Martac folding Prop...it allows the engine, when crusing along to run at a better (slightly higher) rpm range. I know another boat owner with an Atomic 4 engine and he changed to the 5 pitch and is very happy with it.
The C&C27 is a light boat and you do not need a lot to push it.
"IRIS"
1975 C&C 27 MKlll
Hull # 453
Kittery Point, Maine
Hello,
I have a Mk III with the direct drive Atomic 4. I had the original (as best I can tell) prop, a folding michigan blue dot 12X5. The builders file shows that there was a 12X5 folding prop instead of the standard when built. I always thought that this prop was a bit large, as the A4 seemed to "lug", unable to come up to decent RPMs (no tachometer, but I've spent a lot of time around old gas engines). I have a factory rebuilt Martec 11X5 ready to go on, we'll see how it goes.
Just one opinion.
Bob Wooden - Rhapsody in Wisconsin
[As I noted in "List of Props", I've added a table of boats, engines and props to Black Arts. I'd appreciate it if all of you could follow up after you've got a bit of running time in and let us all know how the new props work out. - Admin]
Last edited by (2007-03-21 00:06:07)
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