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Old 26 April 2015, 14:46   #1
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Top speed DF140 / RC585

Picked up my new (to me) Ribcraft 585 yesterday, and went for a spin

I absolutely loved the boat, especially the way it handles. Just one question I am hoping a Ribnetter can help me with.

It has a Suzy DF140, which has just been serviced, and seems to run very well. However when I went to WOT, it seemed to top out at around 33 knots / 5500 RPM. Admittedly it was a little choppy (when isn't it in the Solent?), and I may not have not got the trim right, but I was a little disappointed.

The prop is a new-looking ali 3x14x21. From the engine manual it looks like I should be getting another 500 to 1000 rpm at the top end.

So my questions are what props to others use with the RC585 / Suzi 140 combo, and what sort of top speed do they get?
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Old 26 April 2015, 15:08   #2
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Mine was 40
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Old 26 April 2015, 15:12   #3
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Originally Posted by whisper View Post
Mine was 40
Well tell him how it was propped then!
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Old 26 April 2015, 15:23   #4
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Well tell him how it was propped then!
It's a secret

A standard Ali prop was 40

I then used a Suzi SS 21" prop which gave 42 ish

But AJ. has a 4 blade Ali which is awesome, it really grips on the turns and produces 40 too

There is a race somewhere on video, I'll dig it out....
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Old 26 April 2015, 15:28   #5
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Thanks for this.

Do you know what pitch they were?
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Old 26 April 2015, 15:33   #6
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No but I'll ask AJ.

Video here, you'll see how fast the blue rib picks up, although I did have me and Nos on board :

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Old 26 April 2015, 15:54   #7
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No but I'll ask AJ.

Video here, you'll see how fast the blue rib picks up, although I did have me and Nos on board :

Good Day!
Nos is a bit a of err....um...a "Negative Factor on the Performance"!"??
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Old 26 April 2015, 16:07   #8
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Dunno if this helps...

Click image for larger version

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Old 26 April 2015, 16:13   #9
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This is a test report with the 140 and is the same set up as I have. I have found it pretty accurate.

http://www.suzuki-marine.co.uk/docs/...0-%20DF140.pdf

The fastest I have had is 42 knots with the tide. It is perhaps a tad slower than the new Ribquest 650 super sport with a 175hp.
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Old 26 April 2015, 16:14   #10
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I was pipped at the post😀
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