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Old 15 December 2014, 16:15   #1
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RC 6.4 150hp?

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
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Old 15 December 2014, 18:07   #2
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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

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6.3 with 150 Suzuki

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Old 15 December 2014, 18:11   #3
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RC 6.4 150hp?

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,
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Old 16 December 2014, 10:41   #4
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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.
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Old 16 December 2014, 12:17   #5
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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.
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Old 16 December 2014, 13:52   #6
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to clarify, the website is incorrect. Jason let me know it is indeed 200hp so a 150 would probably be marginal at best.

cheers
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Old 16 December 2014, 14:23   #7
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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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Old 16 December 2014, 15:23   #8
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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.
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Old 16 December 2014, 15:53   #9
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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.
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Old 16 December 2014, 16:30   #10
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Quote:
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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!!
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