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25 July 2012, 22:54
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#1
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Member
Country: UK - England
Town: London
Boat name: N/A
Make: Ribcraft
Length: 6m +
Engine: 175
Join Date: Jul 2012
Posts: 3
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175 Yamaha or 225 Verado?
I'm looking to spec a new 6.4 ribcraft and, as a relative novice, was looking for a little advice on engine choice. I have done a fair amount of research and it's now down to a straight shoot out between a Yamaha 175 or a Merc Verado 225. Is the 225 just too powerful for this length of rib and can anyone provide me with the relevant (rough) likely stats for each option re top end speed, acceleration and fuel economy for this length of rib? I know prop choice will come into the equation but I'm after a rough guide only. The rib will be mainly used for leisure. Thanks.
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25 July 2012, 23:34
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#2
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Member
Country: UK - England
Town: London/Oxford
Make: Ribcrafts
Length: 5m +
Engine: 150hp/2x115hp
MMSI: 235090215
Join Date: Oct 2002
Posts: 2,250
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Verado!
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25 July 2012, 23:37
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#3
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Member
Join Date: Jun 2010
Posts: 2,934
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well the 6.4 is not rated to 225hp so if you want insurance then you better get the 175hp. 225 IMO is waaaaaaaaaay OTT for that hull.
personally i'd get the new merc 150 but hey ho.
cheers
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27 July 2012, 17:27
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#4
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Member
Country: UK - England
Town: Brighton
Join Date: Jul 2003
Posts: 222
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My hunch would be Verados. Have done lots with twin 300 Verados and they are awesome! As for size, I would have thought 225 would be fine on a ribcraft 6.5 but go gently as it will be swift!
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27 July 2012, 18:45
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#5
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Member
Country: UK - Scotland
Town: Glasgow
Boat name: snagglepuss
Make: Shetland
Length: 6m +
Engine: 90 hp Outboard
Join Date: Nov 2011
Posts: 562
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engine choice is very personal so here is some data based on 150hp engines
From a test of 150 hp outboards in a swedish boat magazine:
Boat used: Flipper 605 WA (6,15 meter x 2,32 meter, total weight at test 1400 kilogram, water temp 18 deg. Celsius
Honda BF150
Top RPM in test: 6000
Prop used: Honda HR, 3 blade, 20 inch pitch
a) Speed (knots):
At max rpm: 41,7
Minus 500 rpm: 37,2
Minus 1000 rpm: 32,6
Minus 1500 rpm: 29,1
Minus 2000 rpm: 25,5
b) Fuel consumtion (litre per nautical miles):
At max rpm: 1,27
Minus 500 rpm: 1,03
Minus 1000 rpm: 0,91
Minus 1500 rpm: 0,80
Minus 2000 rpm: 0,75
c) Noise (decibel):
At max rpm: 86
Minus 500 rpm: 84
Minus 1000 rpm: 82
Minus 1500 rpm: 81
Minus 2000 rpm: 80
d) Acceleration (sek):
0-30 knots: 9,2
15-30 knots: 6,8
Mercury Verado 150
Top RPM in test: 6200
Prop used: Mirage, 3 blade, 17 inch pitch
a) Speed (knots):
At max rpm: 41,2
Minus 500 rpm: 36,5
Minus 1000 rpm: 33,4
Minus 1500 rpm: 29,5
Minus 2000 rpm: 25,6
b) Fuel consumtion (litre per nautical miles):
At max rpm: 1,80
Minus 500 rpm: 1,45
Minus 1000 rpm: 1,30
Minus 1500 rpm: 1,04
Minus 2000 rpm: 0,77
c) Noise (decibel):
At max rpm: 87
Minus 500 rpm: 86
Minus 1000 rpm: 83
Minus 1500 rpm: 82
Minus 2000 rpm: 80
d) Acceleration (sek):
0-30 knots: 7,3
15-30 knots: 5,4
Yamaha F150
Top RPM in test: 5600
Prop used: Yamaha Pro Series, 3 blade, 21 inch pitch
a) Speed (knots):
At max rpm: 44,3
Minus 500 rpm: 40,3
Minus 1000 rpm: 35,4
Minus 1500 rpm: 31,7
Minus 2000 rpm: 26,0
b) Fuel consumtion (litre per nautical miles):
At max rpm: 1,26
Minus 500 rpm: 1,10
Minus 1000 rpm: 0,95
Minus 1500 rpm: 0,84
Minus 2000 rpm: 0,78
c) Noise (decibel):
At max rpm: 87
Minus 500 rpm: 84
Minus 1000 rpm: 83
Minus 1500 rpm: 80
Minus 2000 rpm: 79
d) Acceleration (sek):
0-30 knots: 8,3
15-30 knots: 5,9
Fuel you would go with the Honda or Yam, acceleration with be the verado i.e. the verado burns 30% more fuel at full throttle compared to the Honda but accelerates 20% faster with nothing in it for top speed.
anyway the numbers above should give you some idea on which engine is best suited for what you want.
Dave
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27 July 2012, 19:49
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#6
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Member
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 12,153
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Quote:
Originally Posted by Xk59D
well the 6.4 is not rated to 225hp
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It can be if you ask before it's built
Quote:
Originally Posted by Xk59D
225 IMO is waaaaaaaaaay OTT for that hull.
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No it's not
Quote:
Originally Posted by Xk59D
personally i'd get the new merc 150 but hey ho.
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If going for a 150, I'd go Etec
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30 July 2012, 19:17
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#7
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Member
Country: UK - England
Town: London
Boat name: N/A
Make: Ribcraft
Length: 6m +
Engine: 175
Join Date: Jul 2012
Posts: 3
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Thanks everyone. Useful stats and info. For the record the 225 can definitely be spec'd on a 6.4 deep v. Most of the time the boat will be carrying a lot of people (6 plus) and will be used for long distance trips and recreation hence wanting to explore a bigger engine.
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30 July 2012, 20:04
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#8
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Member
Country: UK - England
Town: Wild West
Boat name: No Boat
Make: No Boat
Length: under 3m
Join Date: Jan 2008
Posts: 5,305
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Quote:
Originally Posted by ackcarter
Thanks everyone. Useful stats and info. For the record the 225 can definitely be spec'd on a 6.4 deep v. Most of the time the boat will be carrying a lot of people (6 plus) and will be used for long distance trips and recreation hence wanting to explore a bigger engine.
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Weight as well as Horse power is equaly Important,Especialy when your 'on the limits' and I think the Verado's (Although highly rated) are pretty lumpy, in comparrison to other options.Seems a Big discrepincey in the 'choice' between the Yam 150 and a Verado 225?..Nice Boat the 6.4
By the way got a Suzi 250 DF on my 6.8 RC and Love it!
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A Wise Man learns by other people's!
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30 July 2012, 20:37
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#9
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Member
Country: UK - England
Town: Boat Lake Geneva
Boat name: Lark
Make: Capelli Cap 32 WA
Length: 10m +
Engine: Yamaha 250x2
MMSI: 235096621
Join Date: Feb 2006
Posts: 193
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if you go for as 175, you will only be wondering what the 225 would have been like!!!!!
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30 July 2012, 21:13
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#10
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Member
Country: UK - Scotland
Town: Glasgow
Boat name: stramash
Make: Tornado
Length: 5m +
Engine: Etec 90
Join Date: Feb 2006
Posts: 5,090
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The verados are beautiful machines with fly by wire etc
Is a lot for that length but if it's a heavy fit out , and transom can take the weight then it's down to the skip to manage the power, one problem you will definitely get if the boat isn't rigged to precision, is torque making the boat lean to the left and it won't fly off waves without leaning
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31 July 2012, 16:05
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#11
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Member
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
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Quote:
Originally Posted by Maximus
Seems a Big discrepincey in the 'choice' between the Yam 150 and a Verado 225?..
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Sort of what I was thinking as well.
If you're considering the Verado 225, why not the Yam 225 4-stroke as well? The Yam is 60 lbs lighter, they're both 6 cyl 4-strokes.
jky
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31 July 2012, 18:16
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#12
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Member
Country: UK - England
Town: London
Boat name: N/A
Make: Ribcraft
Length: 6m +
Engine: 175
Join Date: Jul 2012
Posts: 3
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That's interesting. Perhaps I should go for either the 6.4 with a 175 or the 6.8 with a 225. The Verado does seem to be much more thirsty and heavy but faster on the acceleration.
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31 July 2012, 18:44
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#13
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Member
Country: UK - Scotland
Town: Glasgow
Boat name: snagglepuss
Make: Shetland
Length: 6m +
Engine: 90 hp Outboard
Join Date: Nov 2011
Posts: 562
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Thats a pritty fair way of looking at it. My next question would be how long will you keep the engine for? i.e. the worst time to sell an engine is when its just out of warranty i.e. for the yam or verado you would want to sell it after 4.5 years and a honda after 5.5 years or keep it for 7-8 years+. The reason for this is the buyer feels a lot safer spending his money on an engine with warranty than without due to there being no come back if things go wrong. after 7-8 years the price will be a lot less.
anyway hope this is helpful
Dave
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