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Old 04 November 2003, 03:51   #61
TIM
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Country: Ireland
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Boat name: WIZARD
Make: REDBAY 7.4
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Outdrives

Redbay... all outdrive legs are on the power and torque limit in and around the 300hp mark, its no problem putting a bigger engine on to any of the legs, but they simpily will break......

thats why surface drives have been tried on Scorpion or Revenger ?? I dont know which , But its is basicly to shove out more power, with out jetdrive......... Jet drive can handle the power, but doesnt work in the air, and takes up alot of room, heavy and expencive etc etc... and heaps of advantages, but not really for lesure useage, one of there best advantages is they are uniffected by loads, ie fully loaded or empty, (ie fast ferries) and the shallow drive of course

I have heard about Gary, and aparently he Knows his stuff, I would ask him why Volvo...... they have a second hand 8.4 with yanmar (2000), but it now has new 3X leg, so I can only asume that the previous B3 leg died

I hope I have confused you more now


YANMAR YANMAR YANMAR !!!
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Old 04 November 2003, 10:10   #62
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Country: UK - Scotland
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Why is the stern drive so power sapping on the Yanmar? A 315HP engine reduced to 285HP at the sight of a leg . Do you think the 285 quoted for the volvo is with or without the drive? I'm so confused
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Old 04 November 2003, 12:44   #63
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I've always thought it a bit strange that the Yanmar was originally quoted as a 300hp motor until Volvo brought one out, at which point the Yanmar became 315hp, without any changes so I am told. All IMHO of course!
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Old 04 November 2003, 15:01   #64
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Horse power

They just estimate 300hp at the output and allow 15hp for losses incured tro the gearbox, depends on where you measure the horsepower, are you talking about total horsepower or output horsepower , if I have a 130 hp Honda do I have 130 at the prop or 130 in total they merley make an allowance for the losses incured, its quite a lot really to lose tro a gearbox ,Id sooner have it a the props
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Old 04 November 2003, 15:48   #65
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Quote:
Originally posted by Redbay Rover
Do you think the 285 quoted for the volvo is with or without the drive? I'm so confused
285 at the flywheel, 272 at the prop.
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Old 05 November 2003, 13:19   #66
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Have spoken to redbay and they too cannot decide between the yanmar and the volvo. They have arranged a comparison test for me with boats fitted with the engines in question, which is solid customer service (if it comes off). I'm leaning over towards Yanmar, purely because 315 sounds alot better than 285. That way i can at least pretend that my boat has 30 more horses than a KAD300 powered one.

ALSO: Anyone know the torque figure for the KAD300? I can't find it anywhere and i may well prove to be the deciding factor.
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Old 05 November 2003, 15:39   #67
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Movin On

Redbay I was wrong about Movin On one motor just two hatches, however the Redbay with twin motors is the Irishseacruises.com Rib I have two pics Movin on and the one with four ribs shows Movin On and a rare hard top 8.4 Redbay and the twin engined Irishseacruises.com Rib
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Old 05 November 2003, 15:42   #68
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Group of four

This was in Scotland hard top to left and Irishseacruises rib on far right
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Old 05 November 2003, 15:44   #69
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Quote:
Originally posted by Redbay Rover
Anyone know the torque figure for the KAD300? I can't find it anywhere and i may well prove to be the deciding factor.
Yes I do, but why do you feel it matters?
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Old 05 November 2003, 15:46   #70
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Gavin,

What make is the yellow rib second on the right next to the redbay

Paul
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