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Old 02-05-2017, 11:26 PM   #1
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Island Gyspy 210 hp / 315 hp

Why would a new boat owner in 2005 have requested a 315hp Cummins (upgrade) over the then standard 210hp Cummins. Taking into account this is a 32 foot craft ???
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Old 02-05-2017, 11:39 PM   #2
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Hard to imagine why, especially as the sellers "new" boat is 40 ft with a 230hp Cummins. But he didn`t commission the IG, that was the lady who originally owned it.
Wonder who was selling new Island Gypsy boats in Sydney in 2005. Maybe Mark Halvorsen, I think he was still at Bobbin Head then. But,selling Halvorsen and IG?
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Old 02-06-2017, 08:12 AM   #3
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Our 2001 IG 32 has the 315/330 Cummins in her. Have the same question as to why original owner opted for it. Not any additional speed over a friend's IG 32 that had the 210 and we have a turbo and aftercooler to maintain and be concerned about.
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Old 02-06-2017, 08:27 AM   #4
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Because he liked pushing a big bow wave.

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Old 02-06-2017, 08:33 AM   #5
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Probably a Freudian compensation sort of thing.
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Old 02-06-2017, 10:39 AM   #6
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Our 2001 IG 32 has the 315/330 Cummins in her. Have the same question as to why original owner opted for it. Not any additional speed over a friend's IG 32 that had the 210 and we have a turbo and aftercooler to maintain and be concerned about.
I suspect the the 210hp boat was propped right and the 315/330hp boat was/is overpropped.
Also the engines could be the same size .. one w a turbo and the other w/o. A very knowledgable man in the marine propulsion business told me to pay more attention to the cubic inches displacement than the hp rating. Lastly the power rating on engines comes from many sources and countries. My Mitsubishi engine comes from Japan but is rated by Vetus at 42hp, Westerbeke at 44hp and by Klassen at 37hp. Lots of different ratings.
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Old 02-06-2017, 02:42 PM   #7
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Our 2001 IG 32 has the 315/330 Cummins in her. Have the same question as to why original owner opted for it. Not any additional speed over a friend's IG 32 that had the 210 and we have a turbo and aftercooler to maintain and be concerned about.

Thanks David the broker wants considerably more for the 315 over a previous sale of a IG32 sistership 210 based on HP alone .

I will now offer even less based on your experience
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Old 02-06-2017, 04:59 PM   #8
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Was the Cummins 210 NA?
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Old 02-06-2017, 05:25 PM   #9
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Bruce is'nt the na Cummins engine 115hp?
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Old 02-06-2017, 05:43 PM   #10
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Bruce is'nt the na Cummins engine 115hp?
I don`t know Eric. Posts seemed to imply the 210 was NA.I`m happy with NA Lehmans, but Cummins have a great reputation. Still, the IG32 can`t use the 315hp. Cross reference this thread: Engine Size vs Hull Speed
IMO the best IG32 engine set up was twin 80hp Lehmans.
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Old 02-06-2017, 06:09 PM   #11
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I don't know much about Cummins. But I do know there is a 115hp Cummins 6 cyl engine. Must be NA too.
And I think a 120hp increase in power should definitely make an IG go faster. It has the flat and straight run aft to allow that to happen .. all other things being fairly normal.
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Old 02-06-2017, 06:29 PM   #12
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The Cummins 210 hp has a turbo but does NOT have an aftercooler. To get more power than 210 the aftercooler is then needed.

I don't know about the 115 but there was a N/A at ~160 which is still available under the recon program.

I don't think the I.G were full displacement hull, rather semi so the extra HP may get it on plane, maybe a slow plane. Don't know.
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Old 02-06-2017, 06:40 PM   #13
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The 115 hp 5.9 NA Cummins B is not normally marketed as a marine propulsion engine. Industrial application - pumps, gensets, etc.
As Willy pointed out above, beware of the high hp rating being overpropped.
Nothing wrong with having more hp than you need, besides a rather small weight penalty, and a few more maintenance items.
Never heard of a diesel blowing up from running slow...
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Old 02-06-2017, 06:49 PM   #14
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kapnd,
That seems to be the thinking here.
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Old 02-06-2017, 06:57 PM   #15
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I don't think the I.G were full displacement hull, rather semi so the extra HP may get it on plane, maybe a slow plane. Don't know.
You're right about the I.G having an SD hull but my old boat, SeaHorse II, had a Cummins 330B in it and still would not get on plane! It did make all the published numbers so it wasn't over or under propped.
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Old 02-06-2017, 06:59 PM   #16
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I have a pair of the 160's as generators, 1800 RPM, they are turbo, but not aftercooled.
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Old 02-06-2017, 07:11 PM   #17
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You're right about the I.G having an SD hull but my old boat, SeaHorse II, had a Cummins 330B in it and still would not get on plane! It did make all the published numbers so it wasn't over or under propped.
I`d expect high fuel usage for little gain. The IG SD hull is more D than S imho. I still say the IG 32 has no real use for 315hp, 210 hp would be plenty.
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Old 02-06-2017, 11:23 PM   #18
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I don't know much about Cummins. But I do know there is a 115hp Cummins 6 cyl engine. Must be NA too.
And I think a 120hp increase in power should definitely make an IG go faster. It has the flat and straight run aft to allow that to happen .. all other things being fairly normal.
You're right on the engine. The 115 is NA. Remwines (Bob) just installed one in his DeFever 40. He found a great deal on a barn-find posted on Craigslist.

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I don't think the I.G were full displacement hull, rather semi so the extra HP may get it on plane, maybe a slow plane. Don't know.
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You're right about the I.G having an SD hull but my old boat, SeaHorse II, had a Cummins 330B in it and still would not get on plane! It did make all the published numbers so it wasn't over or under propped.
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I`d expect high fuel usage for little gain. The IG SD hull is more D than S imho. I still say the IG 32 has no real use for 315hp, 210 hp would be plenty.
Having enjoyed a few days on SeaHorse II, I saw her SD hull in action. I saw many similarities with my Californian 34 LRC, powered with twin 85 HP Perkins on a semi-displacement hull. Our speed ranges were similar and our fuel burn was close but favored the single IG-32. At anchor, they both behaved similarly.

Then I got the chance to ride on chc's (Chris's) Californian 34 LRC Scooter, with twin Detroit 250s! We took her out for a spin to "see what she'd do!" We topped out at 23 Kts which was very impressive!! The deck angle was so high, though,that visibility from the lower helm was hindered. IIRC, the intermediate speed was in the mid-teens. That was very comfortable and easily achieved, albeit at a cost in fuel $$. Even though the total HP's were different by 185 HP, I was impressed by the performance of a SP vs SD hull. Up to this point, I always considered them variations of the same concept. After this, it seems to me that there is quite a difference.
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Old 02-07-2017, 07:42 AM   #19
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210 and 330 are the same engine block. Both turbo, but the 330 has a sea water aftercooler and the 210 has no aftercooler at all.

I do like the P7100 pump on the 330 better. Much more crisp injection and very nice governor action compared to the CAV pump. In fact the 330 gets better hp/gph than the 210 in midrange, but not sure if that holds way down low.

If both engines are making the same say 40hp at slow cruise, burn rate will be nearly identical and the 330 might be better.

Aftercooler remains maintenance headache, which is only significant downside I see.

I would not spec a 330 for that boat, I'd stick with the 210.
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Old 02-07-2017, 07:50 AM   #20
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"If both engines are making the same say 40hp at slow cruise, burn rate will be nearly identical and the 330 might be better."

For 40 HP the little JD would be an even better choice, as at least it would be 50% loaded.

Even with out a BMEP or fuel map the JD should have lower fuel burn than 210-330 HP run at 15% power.

I have never read of an engine that was efficient at that minor power level.

A displacement boat can only use so much power , after that its a waste of space , weight and maint bucks.
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