Props for 6 Bangers |
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Riley ![]() Grand Poobah ![]() ![]() Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7952 |
![]() ![]() ![]() ![]() ![]() Posted: May-10-2008 at 9:36pm |
I pulled the prop off my Mustang today and it's the smallest inboard prop I've ever seen. It's a Federal 12x8 cupped. It was originally a 12x10, but has been restamped.
Wondering what anyone else is running on their 6's? |
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Bruce, You've got me beat on my Atom. It's a 11 X 12.
I'd have to say that the cup was added and the pitch reduced on the original. Very common when everyone was finding out the benefits of cupping. |
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62 wood ![]() Grand Poobah ![]() ![]() Joined: February-19-2005 Location: NW IL Status: Offline Points: 4527 |
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Bruce,
My 64 six banger had a 12-12 on it when I got her.. I tried a 12-13 I already had and liked it.. lost a little hole shot (like it really matters ![]() My wife could even tell "something had changed" at cruise speed. |
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greatrumpet ![]() Newbie ![]() Joined: August-07-2007 Location: United States Status: Offline Points: 30 |
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My gray 4-90, is turning a 11-11 prop, very nice hole shot with it
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Riley ![]() Grand Poobah ![]() ![]() Joined: January-19-2004 Location: Portland, ME Status: Offline Points: 7952 |
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Steve, if you've ever opened it up, what rpms do you get with each prop? I've read that engine will go 4400, which seems high to me.
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Fasteddie ![]() Newbie ![]() Joined: October-07-2007 Location: United States Status: Offline Points: 23 |
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I've had my 63 American Skier out for the second time. Overall I'm very pleased with the performance of the 100 hp six. I was also wondering about the prop, the max rpm is about 3300. The top end straight line performance is good but it seems to bog down and slow in tight turns and at idle 600 rpm the boat still creates a wake. I looked at the prop for pitch and diameter but all I can find are a series of other numbers, 188L, 74467, 7811, 550 and 335. Just wondering if I should change props for better overall performance.
Thanks |
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8122pbrainard ![]() Grand Poobah ![]() ![]() Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Ed, A prop shop will be able to match the prop against their pitch blocks to tell what it is. Are you sure it's the prop? The engine is ok? Tuned?
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Fasteddie ![]() Newbie ![]() Joined: October-07-2007 Location: United States Status: Offline Points: 23 |
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The engine runs great, I gave it a complete tune over the winter plugs, wires, cap rotor coil and carb rebuild. Thanks for the suggestion, I'll take the prop in and have it measured.
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