Ribcraft

[Maximus]

Originally Posted by phantom 19

The 585 is a stretched 5.5!

Err..NO....it's a completely different Hull

I had a RC 545 for several years out in all conditions with much bigger Boats (and if powered properly) for its size nothing comes close....and have driven... been around ...and even rigged loads of 585's.

Good news about the 6.4 being re-designed/re-hulled....it was needed...obviously RC thought the same

Being heavy lay-up traditionaly built and Deep V hulls RC RIbs do benefit from plenty of power for ultimate performance.
I have a 250 Suz on mine and although propped for Holeshot rather than top end does 47+with ease and has never missed a beat!

[Pikey Dave]

Originally Posted by A1an

Seriously?

Yup, the Suzuki is weak for a 140imho, probably closer to a 130 in reality. It also lacks low down torque & needs time to wind up. It’s the same block as the 90/115 and they’ve “max powered” it up & stuck a 140 badge on it.

“There’s no replacement for displacement”

Apart from that it’s a decent lump, reliable, economical (as long as you don’t include the service costs)

Just my opinion as an owner. No doubt some folks are very happy with it, & that’s fine

[Harleyrib1]

585 & 6.4 side by side kids inheritance is in danger

[Pikey Dave]

Originally Posted by Harleyrib1

585 & 6.4 side by side kids inheritance is in danger

Let them earn their own way, blow it[emoji6]

[gpsguru]

Originally Posted by Pikey Dave

the 585 + the 150 Merc is a great combination.

Yes, I would agree with that ..............

I have a 2019 585 with a mercury 150 (following the great advice on here) and TBH it is an outstanding boat.

Running a Rev4 19P prop, I don't know what the top speed is, at 39knts I was still at 4800rpm with plenty to go, but I ran out of balls

During sea trial's Charlie had it up to 43knts, at just over 5000rpm, so I would guess it will top out at 45 -47 knts.

I use mine as a fast fishing boat, and I am very often out on the offshore wrecks at 20 - 40 miles out in Lyme Bay. I cruise quite happily at 26 - 30knts and the fuel consumption is excellent at about 0.85L / Nm.

My only regret is not going for the larger 170L fuel tank, but it is really no big deal.

Sea keeping is excellent ........... one particular trip back from the skerries banks turned pretty nasty when ALL the forecasts were wrong and the wind swung east and increased to F7/8. Rounding Berry Head on our way back to Teignmouth the sea was confused with 3 to 4m breaking waves, however, we were able to still keep on the plane at 16 -20knt by careful use of the throttle to avoid any stuffing.

Many a time I have returned from the 30 mile wrecks in a wind over tide situation, all the pilot house (including Orkneys) boats are down to displacement speeds, whereas we will still be cruising in relative comfort at about 26knt.

Ribcraft might not be the prettiest boat on the planet, but they are built like a brick out house and deliver when you need it most.

[RickW]

Originally Posted by Maximus

RC 585 is a nice Boat.
Rick W on here paid me a couple of visits at home some time ago for a chat and advice ....he was in pretty much the same position ...and mind as you.

.... May well be worth you time having a chat with him
IF ...you do go the 585 route the new Mer 150 would be a great match

So I did some excellent advice here from PD, Maximus, Lakeland and GPS Guru and various others including Rob Barnard at Black Dog meant I went from 545/585 discussions to a 680

Like GPSGuru I went Merc mine was the 225hp v6

Don’t regret my decision but also like the 4.8/5 the 545 and the 585

It took me 3 or 4 years to make a decision 🤣

Where are you based? Happy to show you round mine just send me a direct message

Here is mine with a 4.8 - the perspective makes the 4.8 look diddy but that’s just the photo

[Pikey Dave]

Originally Posted by RickW

Here is mine with a 4.8 - the perspective makes the 4.8 look diddy but that’s just the photo

Attachment 138976

[emoji6]
https://youtu.be/MMiKyfd6hA0

[RickW]

Brilliant ! And so true 🤣

[Navman]

not sure if I'm using the quote/reply buttons correctly... however... that's an amazing advert for the RC 585... are you sure you're not sponsored by them? Only joking!
It does say to me that a smaller engine might be perfectly adequate though. If I could cruise at 30kts 4 up without thrashing the engine I'd be happy enough.

[lakelandterrier]

I wouldn't drop below a 140 on a 585 unless there was a particular use that didn't need the power . I have a the Suzuki 140 on mine, which is fine, but if I were to buy now I think I'd go for the Merc 150.

I'm less worried at ultimate top speed but want to cruise comfortably and economically at 25-28kts and have power in reserve. With a smaller engine you be running it harder for the same speed.

[Navman]

I have a hunch (and it is just a hunch as I can't find any torque figures to back it up) that the Suzuki 115 would have a very similar mid range power to the 140 as it's the same 2.0litre 16 valve block. The 140 gets extra top end mainly because it revs higher, which is of no interest to me. The 115 is a lot cheaper. Other views more than welcome.

[Pikey Dave]

Originally Posted by Navman

I have a hunch (and it is just a hunch as I can't find any torque figures to back it up) that the Suzuki 115 would have a very similar mid range power to the 140 as it's the same 2.0litre 16 valve block. The 140 gets extra top end mainly because it revs higher, which is of no interest to me. The 115 is a lot cheaper. Other views more than welcome.

Don’t, It’ll be underpowered & disappointing imho.

[lakelandterrier]

I thought on the current series the DF115 and DF140 are the some block, but the DF90 is a lighter one (same as the 70).

I think Suzuki have dropped the 100 for the 115 model now?

I know when I bought my R 5.3 I had a difficult choice between the lighter DF90, and the heavier DF100 which was the larger block for the next tranche of power ranges. In the end I opted for the DF100 for that bit of extra power.

I know several people who have regretted not getting a larger engine, non-one who's said I wished I'd gone for a smaller one and less power.

I don't think you'll cruise comfortably at 30kts 4 up with a 115. you'll certainly be starting to work it. My 140 cruises most comfortably 2 up at 26-27 kts at 4500rpm. It starts to work at 30kts.

Why not try to get a sea-trial / run on a 585 with a 100/115 and a 140/150 and see the difference.

[Pikey Dave]

Originally Posted by lakelandterrier

I thought on the current series the DF115 and DF140 are the some block, but the DF90 is a lighter one (same as the 70).



I think Suzuki have dropped the 100 for the 115 model now?



I know when I bought my R 5.3 I had a difficult choice between the lighter DF90, and the heavier DF100 which was the larger block for the next tranche of power ranges. In the end I opted for the DF100 for that bit of extra power.



I know several people who have regretted not getting a larger engine, non-one who's said I wished I'd gone for a smaller one and less power.



I don't think you'll cruise comfortably at 30kts 4 up with a 115. you'll certainly be starting to work it. My 140 cruises most comfortably 2 up at 26-27 kts at 4500rpm. It starts to work at 30kts.



Why not try to get a sea-trial / run on a 585 with a 100/115 and a 140/150 and see the difference.

^^^^wot he said[emoji106]
2 up or DF140 on the 545 is fine. Put four in & It takes a while to wind up. It’s the low down torque that’s missing, but that’s 4 strokes for you.

[scrambler]

Agree emphatically with PD and LT.
The best decision I've ever made (after much research on here) was buying a 585 (in 2018).
The second best decision was going for a 140 after initially considering a 115 as I couldn't imagine I would ever need the extra power. If I had gone for the 115 I would now be bitterly regretting it. Apart from anything else I imagine it would limit the resale appeal and value, perhaps by more than the initial extra cost.

[beamishken]

Originally Posted by Pikey Dave

Nothing per se, but out of the OP’s lineup it’s the “weakest” candidate imho. The 585 is a ground up design, in that the mould was designed to be a 585, so the proportions are all in order. The 6.4 is a stretched 585 & has a large flat planing pad from around 2/3rds along the keel to the stern. This reduces the power requirements as the hull will plane with lower HP, but it can be hard in certain conditions due to lack of “V”.
The 6.8 is the next mould up & is a completely different hull to the 6.4.

When you say flat planing pad do you mean flat or flatter? This is a picture of the bottom of my 6.5 which has a planing pad but it isnt flat, just wondering if there are more than one version of a 6.4/6.5m boat?

[jwalker]

Originally Posted by beamishken

.... This is a picture of the bottom of my 6.5 which has a planing pad but it isn't flat....

It looks flat in the centre to me, is that an optical illusion?

[jwalker]

Originally Posted by Navman

I have a hunch (and it is just a hunch as I can't find any torque figures to back it up) that the Suzuki 115 would have a very similar mid range power to the 140 as it's the same 2.0litre 16 valve block. The 140 gets extra top end mainly because it revs higher, which is of no interest to me. The 115 is a lot cheaper. Other views more than welcome.

In use the maximum HP is rarely used and is mainly for bragging rights. A motor with big low down and mid-rage grunt will transform your boat and your enjoyment of it. Choose wisely now or regret it forever or you'll end up buying bigger power later...it'll cost you more in the long run. However, if your budget can't stretch, then you've no choice.

[CJL]

Originally Posted by Pikey Dave

As Maximus says above, the 585 + the 150 Merc is a great combination.

Oh yes!

[scrambler]

Originally Posted by beamishken

When you say flat planing pad do you mean flat or flatter? This is a picture of the bottom of my 6.5 which has a planing pad but it isnt flat, just wondering if there are more than one version of a 6.4/6.5m boat?

Here is a picture of the 585 planing pad for comparison: