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Old 06 January 2012, 13:34   #1
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Inboard Diesels for Leisure RIBs - choices?

A year has passed since Yamaha announced their departure from the inboard/outdrive market. Yanmar and Volvo seem well positioned to fill the gap. I've had a bit of time on the 6 cylinder Yanmar 315, managed to horse a Yanmar ZT-350 outdrive and failed to do the same with the ZT-370, so some experience there, however:

Any new thoughts on good power to weight ratio combos from these or other manufacturers?

Anyone had experience with the new Yanmar 320/370hp 8LV? It looks good on paper, but then, they all do - Nice test video below.

I see a couple of small Hyundai Seasall (sounds like a penetrating lubricant) in Redbay Boat's shed. I think they plan to try them on smallish RIBs with a Yanmar leg perhaps? I've never heard of them around here before - any takers for comment?

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Old 06 January 2012, 15:34   #2
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The 8LV does look good and the outdrive, just been on a course for it in Holland at Yanmar.
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Old 06 January 2012, 16:04   #3
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The 8LV does look good and the outdrive, just been on a course for it in Holland at Yanmar.
Right! Was the course on the motor and leg, or just the leg. The ZT-350 was a piece of crap, I've seen the Yanmar agent's service upgrade sheet! What was your take on the improvements than should allow the 370 to handle all that torque?
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Old 06 January 2012, 16:52   #4
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Just the motor really, didnt go into the leg to much other than they have improved the 350, which has been replaced by the 370. I have heard on the grape vine that the leg has been very good, but i have heard of a few problems with a couple engines not producing power.
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Old 07 January 2012, 08:55   #5
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Steyr and VW (now CMD) are both pretty good in my view for power to weight and also fairly refined and advanced being based on modern car versions. Another deciding factor for me with the VW was ease of service as it was marinised by the manufacturer rather than a later company.
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Old 08 January 2012, 06:00   #6
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Don't forget the Yanmar 260's as well - they come with either a gearbox, Bravo I, III or the 370 leg.
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Old 08 January 2012, 06:24   #7
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The ZT-350 was a piece of crap, I've seen the Yanmar agent's service upgrade sheet!
Linky
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Old 08 January 2012, 08:03   #8
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*Cough Redbay 16m flybridge with twin Mercury Racing 1350hp sterndrives *cough *cough



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Old 09 January 2012, 15:19   #9
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So, what's in Quicksilver HPGL that's not in GL5 80w90 I wonder. I'd guess it's still GL5 but synthetic and possibly 140 upper grade.
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Old 12 January 2012, 16:35   #10
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Hi Willk,

Have you had a look at Motorboats Monthly? It seems that one of their articles is a group test of various diesel in-boards. I've not managed to read it yet myself but I was told that the Yanmar 8LV was included.

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