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Old 22 August 2007, 12:20   #1
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Country: UK - England
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Make: avon searider/bom380
Length: 4m +
Engine: merc 50 2 stroke
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what prop merc 50

its an electric start merc 50 2 stroke
i cant find anything stamped on the prop itself but has a sticker on the outboard just above with 12x22 1.83.1 whats a good prop for top speed
thanx



got my new steering teleflex heavy duty kit with steering wheel all delivered nextday for 107 just waiting for a nice day now to fit it thanx to all who helped with that post
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Old 22 August 2007, 12:45   #2
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Country: UK - England
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Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
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10 3/8x14" should be what you're after if that's a (roughly) 10.5" diameter prop. Mine hit 44mph with that prop and a merc/mariner 50.
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Old 22 August 2007, 13:02   #3
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thanx Nos4r2 yes it is 101/4 approx diameter is the one you recommend quite a bit different to whats on there now as i have no idea on prop pitches ,what do the numbers on the sticker refer to
any suggestions where to get one fairly priced?
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Old 22 August 2007, 16:35   #4
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Country: UK - England
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Boat name: WhiteNoise/Dominator
Make: Ballistic 7.8/SR5.4
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MMSI: 235090687/235055163
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The numbers on your sticker are the gearcase reduction. If you look at the prop you'll find a long number that starts with 48. The last 2 digits of that will be the pitch.

Ebay's actually pretty good for cheap props-just get a standard Quicksilver one.
A 50 will push an sr4 so fast there's no point bothering with flash stainless props and so on-you'll never actually make the top speed for more than a couple of seconds before you have to back off. Even a small ripple will cause brown trouser moments

To see what they go like with that prop have a look
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Old 22 August 2007, 18:41   #5
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nice vid that looks absolutely nuts done a fleabay search but only getting them on us sites for bids .nothing on google either for UK purchase but will keep looking
thats the prop i need thanx
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