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Old 07 May 2015, 12:13   #1
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Country: UK - Scotland
Town: dundee
Boat name: slimyseal
Make: avon
Length: 5m +
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prop size

Hi there all
looking to try and answer a wee issue with my sr 5.4m. I put a 60 efi bigfoot on her that came off a pontoon,prop solas 14x11 ss .Tested her the other day and was flying along nicely at around 5000 to 5500rpm and gave her a wee bit more . Heard the beeps so slowed down a bit ,tried again going full throttle and the beeps were there again, no beeps when under full throttle.i am thinking I need a new prop, any ideas on a good size prop for this setup.
Regards Mick
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Old 07 May 2015, 12:52   #2
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Prop sounds too fine for that set-up. Id have though 15" or 17" pitch. Might be someone here with the same outfit.
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Old 08 May 2015, 09:19   #3
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Country: UK - Scotland
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prop size

I think around 350rpm per 2 degrees,thats 700 rpm ,should be about right. Gonna go with a 15" solas. Appreciate the reply.
Regards Mick
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Old 08 May 2015, 09:25   #4
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Country: UK - Scotland
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Yip. Just spoke with one of my mates who had a 5.4mtr Humber with a 60hp Big Foot Mariner (old carburated one) and he was using a 16" stainless. The boat done around 30kn with that.
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Old 08 May 2015, 10:09   #5
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prop size

The bigfoot has a different ration LU compared a non bigfoot model, they can run bigger props.

I ran 17" props on my 5.8.

I may even have one if you want to try it.
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Old 08 May 2015, 10:41   #6
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Country: UK - Scotland
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Boat name: slimyseal
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Length: 5m +
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prop info

Appreciate the offer A1an,turns oot I have access to a few through a mate. will reply my findings though.Cheers
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Old 10 May 2015, 20:14   #7
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Country: Australia
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I find this useful continuousWave.com: Whaler: Reference: Propeller Calculator

Jon
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