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Old 24 July 2013, 16:06   #41
Country: UK - England
Town: Sussex
Boat name: Bombard, Y-162
Make: Aerotec 380, Y-Class
Length: 3m +
Engine: Mercury Mariner 15hp
Join Date: Jul 2010
Posts: 2,500
Tach worked great but too choppy for real testing. Bouncing around so much hard to be exact but I think max revs at WOT was 5300 or so. Not exactly ideal conditions though and as per 'losing air' topic not the best day for other reasons.

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Old 24 July 2013, 17:40   #42
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Country: UK - England
Town: Marple
Make: Zodiac
Length: under 3m
Engine: Tohatsu 9.8
Join Date: Jun 2009
Posts: 551
My Tohatsu 9.8 managed about 5500rpm on calm waters.

This equated to a max speed of just under 20mph. So it sounds like you have got it about right.

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