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  #1   IP: 72.82.64.140
Old 10-11-2011, 09:55 PM
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Ball Racing Ball Racing is offline
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12.5 mph

Well I finally got my A4 running, and well,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
It's not in a sail boat, but my 19ft. Chesapeake Bay style Deadrise Skiff I built. I am trying to keep it old school from around here back in the commercial haydays from way back.
I have a 12x8 prop that is holding the engine back to 2,200 rpms at full throttle, ( it reaching this at half throttle, just won't turn more rpms when you shove it down)
I need to work with some props..
It went 12.5 mph the other day, and that IS putting it up on plane, but thats it...
Anyway still working problems, and bugs out..
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  #2   IP: 151.200.21.32
Old 10-11-2011, 10:03 PM
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Daniel...that is truly fantastic!

We need to find you the correct prop!

I am not sure of any A4's doing 12.5 mph...all of our old girls are envious already!
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  #3   IP: 96.233.116.164
Old 10-11-2011, 10:22 PM
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I wonder what RPM you'd get with an Indigo prop where you get 2200 RPM with a 12x8. I couldn't get more than 1500 RPM with our old 13x8 and I get 400 more with the Indigo. You must have some sweet lines on that skiff!

Mark
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  #4   IP: 72.82.64.140
Old 10-12-2011, 08:04 AM
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I need to look toward "performance" props now, and not towards the sailboat type that are for displacement type slippage.
I have a OLD Aqua Master (federal?) 3 blade on there now.
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  #5   IP: 107.0.6.242
Old 10-12-2011, 08:13 AM
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First of all I'd like to say that is a magnificent little boat - reminds me of a work boat we had at Edgartown Marine. We had the A4 too but with 2:1 reduction. Actually, 2200 rpm for 12.5 mph is not too shabby. Your hull is not really a planing one and I don't think you will get much more with direct drive. Try a cupped 3 blader with maybe 1 more inch of pitch.
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  #6   IP: 72.45.54.12
Old 10-12-2011, 08:37 AM
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Daniel,

Great job! The A-4 looks magnificent in that gleaming white paint! You got anymore close-ups of the A-4?
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  #7   IP: 207.255.179.176
Old 08-20-2014, 10:56 AM
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Quote:
Originally Posted by hanleyclifford View Post
First of all I'd like to say that is a magnificent little boat - reminds me of a work boat we had at Edgartown Marine. We had the A4 too but with 2:1 reduction. Actually, 2200 rpm for 12.5 mph is not too shabby. Your hull is not really a planing one and I don't think you will get much more with direct drive. Try a cupped 3 blader with maybe 1 more inch of pitch.
Hanley...was that work boat at Edgartown Marine the pump out boat with big 55 gal. drum in the middle? I crewed on an old motor yacht that stayed in Edgartown on a mooring and the guys would come out to pump us out.
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