Ribcraft 585

HUMBER P4VWL · 13 June 2015, 07:04

Would a 90hp 4 stroke be enough?

Would a 90hp 2stroke be enough?

What's the max hp allowed on them?

spartacus · 13 June 2015, 07:29

Apparently it can take up to 150hp maximum. That might be a tad excessive for a sub 6m rib. I suppose it's all down to use, number of people on board, weight you're carrying, etc. Having said that, it still weighs in at 390kg.

Suzuki DF140 should be in your mix at 186kg. They do come up occasionally for sale second-hand.

New Yamaha F115 weighs in at 171kg, and F150 at 218kgs.

Old school Yamaha 90hp oil-burner is a mere 120kg.

Ribcraft Professional Boat Specifications - Yeovil, Somerset, UK

tony t · 13 June 2015, 07:30

Quote:

Originally Posted by HUMBER P4VWL

Would a 90hp 4 stroke be enough?

Would a 90hp 2stroke be enough?

What's the max hp allowed on them?

You been in the sauce HP ...

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HUMBER P4VWL · 13 June 2015, 07:55

Nah, a mate is looking. There's a nice one on ebay with a 115 4s and an older one with a 90 Honda. Can't help but feel an almost 6m with a Honda 90 4s could be a bit wheezy.

lakelandterrier · 13 June 2015, 08:15

I'd want more than 90 on a 585. I have 100 on my 5.3. The 585 is rated to 150, but a 140 seemed to be the most popular engine.

HUMBER P4VWL · 13 June 2015, 08:55

My thoughts too, 90 is going to be working hard a lot of the time. 115 would be ok I guess, but 140 ideal, though likely heavier i suspect.

Searider · 13 June 2015, 09:04

I went on a BIBOA. Cruise many years ago and there was a 585 with a Mariner 90 4 stroke. It was adequate for cruising about but that's it
Our 5.4 sea rider ran rings around it.

What is the thinking on the power of a 140 Suzuki? 126hp?
Many had those and went really well. So, perhaps a 115hp would be good.

jambo · 13 June 2015, 09:07

And good they are with 150's. I've just changed from a Mariner 250 two stroke to a Merc 150 fourstroke

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Bern Hanreck · 13 June 2015, 09:41

Paul , I have had the same rig for over 12 years now . I run quite heavily laden with fuel ( plus me

and crew ). We can cruise happily all day at 25knts and max out at 34 under ideal conditions. Average the ubiquitous 1 litre per nm.

Sure there are occasions when a few more horses would not go amiss but if you search back through the archives there was a suggestion that if wrongly set up or trimmed , a 150 could make a 585 chine walk . Regards Bern

HUMBER P4VWL · 13 June 2015, 10:22

Cheers Bern. It'd be my mate's first boat so I think a 150 would be too much. Whilst he's 6ft3 and has two boys 8 and 10, he's not carrying divers and the like. It'd be for fairish weather boating, pulling toys and cruising about. I think the one with a 115 4s would a good set up. Ideally a 140 4s but heh, it'd be more ££ and there isn't one on the market!

jambo · 13 June 2015, 10:31

a 150 could make a 585 chine walk . Regards Bern[/QUOTE]

Sorry Bern it doesn't. I've had one for eleven years and it does not vary. Would not change!!

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Maximus · 13 June 2015, 10:43

Quote:

Originally Posted by jambo

a 150 could make a 585 chine walk . Regards Bern

Sorry Bern it doesn't. I've had one for eleven years and it does not vary. Would not change!!

Sent from my iPhone using RIB Net[/QUOTE]

100%
I've driven a few and they're fine.
Of course all RIBs will Chine walk if you're trimming out to Maximum at High revs..ie trying for a Max Top Speed run/trial..providing they have enough power to make em fun that is!!

Usually a good sign to Back off!

Pikey Dave · 13 June 2015, 11:23

My 585 tonked along quite nicely with a 175 on the back, though it did start to twitch at around 46-48kn

. Always worth checking the rating plate on Ribcrafts for max hp, they often build custom boats to owners requirements, my 6.4 is rated to 300hp.
With a 90 on the back it will move, but not set you alight, probably disproportionately heavy on fuel as well.

Bern Hanreck · 13 June 2015, 12:10

Quote:

Originally Posted by Bern Hanreck

Sure there are occasions when a few more horses would not go amiss but if you search back through the archives there was a suggestion that if wrongly set up or trimmed , a 150 could make a 585 chine walk . Regards Bern

Jambo / Maximus ,
I don't post very often here nowadays because of some of the crap that flies about . When I do post I try to get my facts right........

Soon after I bought the Ribcraft in 2002 , there were some posts about such matters as chine walking 585 . I've had a quick look but can't find them.

I exchanged a few emails with Jason at Ribcraft who explained under certain circumstances it COULD happen .

Just because you have not personally experienced it , it doesn't mean that it CANNOT happen . Regards Bern

jambo · 13 June 2015, 12:20

Quote:

Originally Posted by Bern Hanreck

Jambo / Maximus ,

I don't post very often here nowadays because of some of the crap that flies about . When I do post I try to get my facts right........

Soon after I bought the Ribcraft in 2002 , there were some posts about such matters as chine walking 585 . I've had a quick look but can't find them.

I exchanged a few emails with Jason at Ribcraft who explained under certain circumstances it COULD happen .

Just because you have not personally experienced it , it doesn't mean that it CANNOT happen . Regards Bern

Wow Bern I was not having a go at you or your facts. All I was saying was that I've had two ob's and have not had any problems with chine walking. But there again I drive within capabilities. Regards B

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matt h · 13 June 2015, 13:48

Mollers · 13 June 2015, 14:01

Quote:

Originally Posted by jambo

Sorry Bern it doesn't.

Surely any fast planning hull running enough hp will chine walk if you're 'brave' enough with the buttons?

I've trimmed the life out of my 7m at full chat attempting to get past Jim and things have become quite 'interesting'.

spartacus · 13 June 2015, 14:33

Quote:

Originally Posted by HUMBER P4VWL

I think the one with a 115 4s would a good set up. Ideally a 140 4s but heh, it'd be more ££ and there isn't one on the market!

Mint 2014 Yamaha F115 long-shaft, £6,750, inc VAT.
Yamaha - F115AEL Boat Engines for sale in Shropshire, West Midlands | Boats and Outboards

It's an extra-long shaft, but I've read a few posts about one being fitted. 2009 Suzuki DF140, low hours, £5,500, tax-exempt Suzuki - DF140 Boat Engines for sale in Pembrokeshire, Wales | Boats and Outboards

Yamaha F150 long shaft, 300 hours, stainless steel propeller, £4,500 + VAT
Yamaha F150 Outbaord Motor (no Controls), Pembrokeshire - FAFB

2001 Ribcraft 585 and Yamaha 115hp (XL shaft)
IYBB Boat details

Decisions, decisions.

HUMBER P4VWL · 13 June 2015, 15:04

Found another option for him closer to home. But cheers all.

Channelop · 15 June 2015, 14:36

Quote:

Originally Posted by spartacus

Mint 2014 Yamaha F115 long-shaft, £6,750, inc VAT.
Yamaha - F115AEL Boat Engines for sale in Shropshire, West Midlands | Boats and Outboards

It's an extra-long shaft, but I've read a few posts about one being fitted. 2009 Suzuki DF140, low hours, £5,500, tax-exempt Suzuki - DF140 Boat Engines for sale in Pembrokeshire, Wales | Boats and Outboards

Yamaha F150 long shaft, 300 hours, stainless steel propeller, £4,500 + VAT
Yamaha F150 Outbaord Motor (no Controls), Pembrokeshire - FAFB

2001 Ribcraft 585 and Yamaha 115hp (XL shaft)
IYBB Boat details

Decisions, decisions.

That 585 with the xl 115 is no longer for sale. I know this because it's mine. For what it's worth, the 115 is a great rugged engine (I've had three of them on different boats) and in my opinion is the right sort of power for the boat. With two people it tops out around 36 knots though I've touched 38 in very flat water. However it won't chine walk or skip, whereas a 585 with a 150 in my experience will do both. I'm not saying a 150 is a bad thing, it goes really really well, but the 115 is a very sensible option (if sensible is your thing!).

I wouldn't have thought 90hp is enough, you'd really feel the lack of power in a head sea or loaded with 4 or more people.