RC 6.4 150hp?

[Xk59D]

hey folks,

still doing the researching before dropping the coin on a new boat.

Does anyone have a 6.4 with a 150 ish motor?

it is rated for 175hp but that means the outboard i want (new merc 4 stroke) is out of the running......i know ideally should aim for the max allowed but i don't want a suzi (price is off putting) or an etec.

thoughts?

cheers

[Short fuse]

I think Ribquest do a 6.3 which is a a deep v hull but can take large engines like 150s, but they just brought out a slightly wider hull what you can get in 6.5, 7 & 7.5, the 6.5 can take 175 suzuki but if you don't want suzuki then I think they will supply different makes of engines,

6.5m with 175 suzuki



6.3 with 150 Suzuki

[Short fuse]

Just to add, that ribquest is an extremely capable sea rib so depending on what you will use it for there maybe faster hulls and cheaper boats,

[redthunder]

I run a Redbay 7.4 with twin merc 150 four strokes. It will do 34 knots on one. That's how powerful they are.

[Pikey Dave]

I have a RC6.4 with twin 115 Etecs. It will do around 28kn on one engine & 40 on the pair. I would have thought that 150 should shift it ok. Personally I'd always go to the max hp.

[Xk59D]

to clarify, the website is incorrect. Jason let me know it is indeed 200hp so a 150 would probably be marginal at best.

cheers

[John Kennett]

There's definitely been an engine escalation over the last 10-15 years. It used to be common to see 6m boats with 90hp motors, and they were fine. I spent a while on a 585 with 90hp in Scotland and it was a great cruising boat.

I had a 7.4m RIB with a 165hp diesel which was a great cruising boat. A top speed of 36 knots wasn't anything to write home about, but the only time it felt underpowered was in a flat calm. I took it round Britain. Alan Priddy took it across the Atlantic!

I reckon the 645 would actually be fine with a 150, but resale does seem to suffer on boats that aren't engined up to the max which might be worth taking into account.




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[Dan Gurney]

Originally Posted by John Kennett

resale does seem to suffer on boats that aren't engined up to the max which might be worth taking into account.

Not sure it needs to be quite "up to the max", there seem to be commonly acknowledged 'good combos' like the RC585 and Suz 140 for example. Speaking as someone who has recently been poking around the second had market underpowered boats put me off more than overpowered (and by overpowered I mean all the way to the max) but it was still a concern.

[jambo]

Originally Posted by Clamchowder

Not sure it needs to be quite "up to the max", there seem to be commonly acknowledged 'good combos' like the RC585 and Suz 140 for example. Speaking as someone who has recently been poking around the second had market underpowered boats put me off more than overpowered (and by overpowered I mean all the way to the max) but it was still a concern.

Yes but thats only because of the weight of the recent 4 strokes like the Suzi 140 hp . I have an RC 585 with a Mariner 150 V6 2 stroke on the back and it is well suited. The decrease in the weight of the new Merc 150 brings it within the spec for weight.

[Maximus]

Originally Posted by jambo

Yes but thats only because of the weight of the recent 4 strokes like the Suzi 140 hp . I have an RC 585 with a Mariner 150 V6 2 stroke on the back and it is well suited. The decrease in the weight of the new Merc 150 brings it within the spec for weight.

Hey Billy If it works Mate it works!
Mines overpowerd in some "quarters".....But Blimey it goes well in the Rough!!

[jambo]

Originally Posted by Maximus

Hey Billy If it works Mate it works!

Mines overpowerd in some "quarters".....But Blimey it goes well in the Rough!!

Hi mate that's the benefit of having an RC they are great sea boats takes some beating


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[Xk59D]

I would be quite happy with a RC , osprey or a redbay TBH.

I have never been on any of them so going on forum opinions and my own.

[willk]

Originally Posted by Xk59D

I would be quite happy with a RC , osprey or a redbay TBH.

I have never been on any of them so going on forum opinions and my own.

Considering what your coming from and where your thinking about going (Avon/Ribcraft), I'd be having a look at the Redbay 6.1m with either a Suzuki 140 or Merc 150. Great boat on the water Clam just sprung for one brand new - just sayin' is all...

[Xk59D]

Got a quote tonight for one, was speaking to them today.

I'll miss the Avon, love it, with that said I want to go further out now so I've served my apprenticeship as it were and want a bigger boat.

Cheers

[Dan Gurney]

Originally Posted by willk

Considering what your coming from and where your thinking about going (Avon/Ribcraft), I'd be having a look at the Redbay 6.1m with either a Suzuki 140 or Merc 150.

Though of course it's rated to 175 innit, if you want to go the 'whole hog'.

[willk]

Originally Posted by Clamchowder

Though of course it's rated to 175 innit, if you want to go the 'whole hog'.

Unless you're carrying a big load, I'd not bother. They're a finely balanced blade around the 150hp mark. I think you nailed it. donegaldan's Deep Six runs in the very high thirties and jumps waves in perfect form, dropping the prop in first and carrying on as if nothing had occurred....

[Dan Gurney]

Originally Posted by willk

donegaldan's Deep Six runs in the very high thirties and jumps waves in perfect form, dropping the prop in first and carrying on as if nothing had occurred....

Is his a 150 or a 140 though, there's a big weight diff between the two?

[Hightower]

150 will be fine on a RC of that size. As already mentioned before, you'll only miss that extra power of a larger outboard on a calm day, much better to setup for moderate to rough conditions which usually lowers top speed at WOT

[willk]

Originally Posted by Clamchowder

Is his a 150 or a 140 though, there's a big weight diff between the two?

He has a 2003 Suzuki 140, so maybe a few HP under stated. His 6.1m layup is probably heavier than yours too - more ply in it back then, so with the allegedly more powerful 140hp of today, you should be on to a winner combo.

[hadd]

Originally Posted by Maximus

Hey Billy If it works Mate it works!

Mines overpowerd in some "quarters".....But Blimey it goes well in the Rough!!

I'll agree with that Matt remember France!!😊👍


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