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Old 09 June 2012, 03:36   #1
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Avon Searider 4mtr, Mercury 50hp 2 stroke prop

Hi, I would like to hear anyone's experience of propping a 50hp on a Searider 4mtr. I have just bought one with an unidentifiable prop, it has great hole shot but max is 34knt, it has seen better days so have just bought a new prop on advice of experienced shop owner, but on arrival it looks a lot smaller and pitched shallower than the existing prop, so before I launch what should I expect to happen?

I have just bought a rev counter do not fitted yet, but just wanted a rough idea as to what to expect with a 1" smaller diameter prop and shallower (flatter) 15" pitch, new prop is a Mercury Black Max 10 1/8 x 15 pitch in AL.

Thanks,
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Old 09 June 2012, 03:43   #2
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Which Merc 50 2 stroke is it?
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Old 09 June 2012, 03:43   #3
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1999 3 cylinder
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Old 09 June 2012, 03:48   #4
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1999 3 cylinder
Bigfoot or normal?
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Old 09 June 2012, 03:49   #5
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Normal
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Old 09 June 2012, 09:31   #6
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If you are getting 34knots in my experience that will be about it, I have a Yam 50hp 2st & 33knots is about it, although some one from the USA recons he is getting 50knots ????
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Old 09 June 2012, 09:47   #7
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If you are getting 34knots in my experience that will be about it, I have a Yam 50hp 2st & 33knots is about it, although some one from the USA recons he is getting 50knots ????
I think he may have left his sat nav on when he towed it home.
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Old 09 June 2012, 12:13   #8
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it'll chine walk like a bitch much faster than that - sounds about right - had a 15" merc one on and 17" standard yamaha alloy on mine - 50knots is just bollocks
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Old 09 June 2012, 13:51   #9
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Thanks for the replies, I have searched the site and looked in awe at the 50knt report, I doubt I could reach that speed even with wind and tide.

Anyhow, went out in the Solent today, a bit lumpy and was 2 up for safety, we also had twin 25ltr tanks on board so a good bit of weight. The new prop seemed good, I don't think I quite got the same hole shot speed but as I said I had a passenger and an additional 25 ltr of fuel, it was force 6 gusting 8 so just ploughed through although occasional blasts produced stunning performance. Tomorrow looks better with force 3 gusting 5 so will head out again and report back.
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Old 09 June 2012, 14:16   #10
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IF it's the same gear ratio as my old '93 50hp non-bigfoot Merc on my old SR4, I got 44mph (or about 39 knots) with a 10 3/8x14" prop on it, solo but it dropped to about 34 knots 2 up.

50 knots is utter bull. At 39 knots I was just the other side of the chinewalking on oil calm water.
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