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Old 23 May 2013, 17:40   #1
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Found this Nautica 24' Cat

2008 24'Foot Nautica Inflatable Rib Catamaran I/0 Volvo D4-260 Turbo Diesel | eBay

Its not mine *yet , but was wondering what folks think of the price ?
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Old 23 May 2013, 20:52   #2
zip
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It's pretty, but that price is the starting price. They might want twice that.

That engine sure does take up a lot of space though.

Good luck.
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Old 24 May 2013, 11:49   #3
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It does take up space, but I expect it would really be a smooth ride with that extra weight and the cat hulls.

On the cost - this thing has been up 4 times on ebay, and posted elsewhere for months - it won't sell at the reserve price.
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Old 24 May 2013, 14:07   #4
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On the cost - this thing has been up 4 times on ebay, and posted elsewhere for months - it won't sell at the reserve price.
+1
It's been around a while.
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Old 24 May 2013, 15:08   #5
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I own a 24' Nautica RibCat with twin 150 outboards.

FWIW - the problem with diesels on these Ribs are plentiful including:
1. Large loss of space/seats
2. I/O has more draft / needs more water
3 Deeper I/O limits performance/outboards run much better up on jack plates
4. Hard to service diesel

Hope this helps
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Old 24 May 2013, 15:41   #6
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1. Large loss of space/seats
Yes
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2. I/O has more draft / needs more water
True, but in CA we don't need a shallow draft. No flats, intercoastal waterway, rivers, etc.
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3 Deeper I/O limits performance/outboards run much better up on jack plates
Very true! I'd bet raising my outdrive would give me better performance...it's buried deep!
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4. Hard to service diesel
Personally, I think servicing my Cummins is much easier than any outboard (except maybe the 30hp two-stroke I have on the sib). But, this has Volvo...
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Old 24 May 2013, 16:08   #7
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"Very true! I'd bet raising my outdrive would give me better performance...it's buried deep!"

Absolutely - these Cats like the props very near the surface for good performance. We run ours near the very top of the 5" jack plate heights to get the best all around speed and acceleration. Also when needed I can lift the motors with the props clear out of the water for towing, beaching, and working on them. The prop will be that much lower due to the extra #500+ on the stern of the boat.

"Personally, I think servicing my Cummins is much easier than any outboard (except maybe the 30hp two-stroke I have on the sib). But, this has Volvo... "

I would guess you have 6b's in a larger boat that keeps the engines clean and dry with good all around access for the most part similar to the larger boat we have. IMHO - putting a 1,500# supercharged , turbocharged, 4 valve per cylinder, intercooled 3,600 rpm diesel in one of these boats is looking for a problem for numerous reasons. If you consider this configuration please do your homework on the issues.

Hope this helps
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Old 24 May 2013, 16:14   #8
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I would guess you have 6b's in a larger boat that keeps the engines clean and dry with good all around access for the most part similar to the larger boat we have.
Yep, 24 foot rib and my 6B only 210 hp... non-aftercooled, all mechanical...

Now a large common rail electronically controlled Volvo....different story.
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Old 24 May 2013, 16:24   #9
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"Yep, 24 foot rib and my 6B only 210 hp... non-aftercooled, all mechanical..."

So you are likely only pulling 150 hp or so out of the Cummins at a decent cruise. That would equate to a safe rate of about 25 hp per liter of engine displacement and running in the area of 2,300-2,500 rpm's.
That is quite different than extracting up to 260 hp out of 3,.7 litres of engine at 3,500+. And once you deal with the Cummins issues with the raw water pump and the aftercooler they run really well without too much attention. Since you have no aftercooler (JWC?) then you have some of the least issues to deal with.
Every engine has its issues no matter what the type - the key is to get the ones with the least issues, deal with them, and and use them as they are best situated.

Hope this helps
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Old 24 May 2013, 16:37   #10
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"Yep, 24 foot rib and my 6B only 210 hp... non-aftercooled, all mechanical..."

So you are likely only pulling 150 hp or so out of the Cummins at a decent cruise. That would equate to a safe rate of about 25 hp per liter of engine displacement and running in the area of 2,300-2,500 rpm's.
That is quite different than extracting up to 260 hp out of 3,.7 litres of engine at 3,500+. And once you deal with the Cummins issues with the raw water pump and the aftercooler they run really well without too much attention. Since you have no aftercooler (JWC?) then you have some of the least issues to deal with.
Every engine has its issues no matter what the type - the key is to get the ones with the least issues, deal with them, and and use them as they are best situated.

Hope this helps
Yes, spent plenty of time on boatdiesel...I'm not pulling anywhere near the hp you can from this engine which is why they say that there will be some longevity to it. Since most of my cruising is off the coast of CA in snotty conditions, a 25 knt cruise makes me plenty happy

No raw water issues yet. I've rebuilt the Sherewood 1716 to the tune of $200 so far and keep up with impeller changes. The 1716 I run is 2 sizes two big for a non-aftercooled engine (no SWAC or JWAC) my temps stay happily in check.
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