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Old 21 June 2011, 11:10   #51
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What sort of prop and size are you running and what engine revs are you getting at WOT
Standard prop

6000RPM


Will
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Old 21 June 2011, 15:12   #52
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Country: Other
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Valiant DR750, Merc 150, 19inch pitch, all 13 stone of me on board and 2 litres of fuel - 15 knots MAX.......

Still have major issues!

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Old 21 June 2011, 16:52   #53
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Valiant DR750, Merc 150, 19inch pitch, all 13 stone of me on board and 2 litres of fuel - 15 knots MAX.......

Still have major issues!

did you remember to untie the rope from the quay side
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Old 21 June 2011, 17:02   #54
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No it didn't come with a quayside. The prop model number says LH on the end - tried to google it but no luck so far......
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Old 21 June 2011, 17:14   #55
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No it didn't come with a quayside. The prop model number says LH on the end - tried to google it but no luck so far......
Dats yer problem then .. try leaving from de other side next time .. and seeing as water always goes down the plughole clockwise in de norn' hemisphere .. keep makin roit turns on de way out ye'll be doin 50 before ye know it
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Old 22 June 2011, 05:08   #56
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I once managed 312 Knts on the GPS through Largs marina!

It would appear all those masts confused the Garmin for a couple of miliseconds and it momentarily put me half a mile up the hill according to the track log. I guess in the time it got confused and corrected itself the mile round trip would have needed to be at 312 Knots!
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Old 22 June 2011, 14:51   #57
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Is your engine new or second hand? could your engine have a left hand prop fitted instead of a rigt hand, then been rigged to run the engine in reverse so as to make the boat go forward. outboards tend not to run at full speed in reverse!
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Old 16 July 2011, 12:43   #58
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I've done 42knots...that was the limit of my personal comfort...we could have done more...normally cruise around 25knots (bugs hurt at 42kn)
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Old 17 July 2011, 06:36   #59
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5.85 Ribtec with 150 Opti, light fuel load & 23" prop touched 44 kts BUT chine walked at anything over 32 ish knots, so much so I'd resigned myself to never exploring the engines potential
However now on a 21" prop and with a full fuel load and extra anchor & chain in bow locker she's now much more stable, able to cruise at 30 kts and no chine walking up to about 40 kts, briefly saw 46 kts at 5200 rpm
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Old 17 July 2011, 07:49   #60
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Make: Ribcraft 4.8m
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Ribcraft 4.8m, Tohatsu 2-stroke 60hp, tweaked to 70hp, standard 15" aluminium propeller, 50 litres of fuel, two people on board, 36mph at 5,800 revs. A larger pitch stainless-steel propeller would make a difference.
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