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Old 23 August 2010, 10:19   #11
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Yes - basically I can have any prop from the range as the "included with engine" one - and the Raker is a couple of years old and available at a good price so I am going to have that one as well - it is a long time to wait to get a new prop (or a lot of money for one to come by DHL) if I prang it on the bottom...
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Old 23 August 2010, 10:57   #12
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Hightower, i have a spare rh 17" viper if you want to try it.
That would be interesting on a CCW motor.
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Old 23 August 2010, 11:42   #13
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That would be interesting on a CCW motor.
Well, might be the first time you see a rib planing in reverse
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Old 23 August 2010, 13:19   #14
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Hightower, i have a spare rh 17" viper if you want to try it.
Thanks Gordy, but the prospect of 35 kots in reverse scares me a little
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Old 23 August 2010, 16:17   #15
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Does 3 foot of water coming in over the transom count as a stuffing?
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Old 23 August 2010, 20:16   #16
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Does 3 foot of water coming in over the transom count as a stuffing?
But it's good for keeping your deck clean after a fishing trip
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Old 24 August 2010, 21:03   #17
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Props now ordered ... I decided on the 19" Viper and the 20" Raker in the end. Throttle response and hole shot with the Viper should be a blast

Thanks for the input
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Old 29 August 2010, 06:47   #18
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Chris Stevens, running a heavier 6.5m Vmax with the same engine, told me he gets 5500rpm on a 19" Viper, which would suggest that with a shorter and lighter boat it is going to be well above that.
Looking at the figures from Roy I would think either a 20" Viper would be a good all rounder.
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Old 01 September 2010, 06:30   #19
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Looking at the figures from Roy I would think either a 20" Viper would be a good all rounder.
I would definitely have gone for that option except that I already had the cheap 20" Raker, toyed with the idea of getting two props the same pitch or two slightly different and in the end decided that two different ones would be worth a try, by the time I bend one I'll have a good handle on what the respective performance is on this boat and be much better placed to choose its replacement. Roy said the full speed runs were slightly hampered by the size of the lake!

Not sure what the 19" will do but will find out in October I guess ... as martini observed, even if the engine will in theory over-rev, you don't need to use WOT... and I don't most of the time anyway so it will not be a big problem. Mid range economy is more important than outright speed so will be keeping a close eye on that and will report back for the benefit of others facing the same choice. Going on the limited figures Roy could provide (again hampered by running out of lake) it seems that the economy will be pretty good and miles better than the old carb 2 stroke.

For the moment I am happy to now be able to say "my boat arrives next month"
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