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Old 02 May 2004, 18:00   #11
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I had to look it up of course! I'm not full of that much useless information. I thought 130 was a bit low, so checked it out...
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Old 03 May 2004, 10:51   #12
nik
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Thanks for the replies chaps, I am a bit clearer about this issue.
As Jim asks, what about volvo legs? are they better?
Nick.
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Old 03 May 2004, 15:39   #13
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Yamahas

Yes Yamahas do go, however you cant make a comparison bassed on a round the world trip with a Yamaha outdrive, pushing a boat loaded with, was it 4 tonnes of Diesel, Alan used 3 outdrives, to be fair one failure was the result of a collision with an unmarked fish farm,it may have done it on two outdrives apart from that incident.Look at the variables involved, fuel quality not always as good as it should be, invaribly you have to run the motor harder to get the preformance, huge fuel weight and heavy boat, long periods at sea, endless running time, the paint on the top of the hydra drives melted with the heat, these were extreme circumstances, I would be quite happy to use two or three on a round the world trip.I definatley like the concept of the hydraulic drive system and I do hear of much more Bravo failures than Yamaha ones.No Yamaha drives arnt infalible, however when you see aftermarket modifications to reduce heat on outdrive units ie showers, you have to wonder

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The Bravo 3x drive, well, well, well, after 800 hours and 3 legs I decided it was time to sell the boat, the leg and engine (300 hp yanmar )was serviced as required by the manufacturers, I have just heard that the 3rd leg has now got problems.......thank god its not mine anymore....installing Yamahas in the new 11m, wish me luck!
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Old 03 May 2004, 18:10   #14
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Quote:
Originally Posted by gavin
...installing Yamahas in the new 11m, wish me luck!
To which drives, Gav?
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Old 04 May 2004, 12:43   #15
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drives

Not sure which drives he is going to fit,
Bravo 3 Legs
Have you had any bother with the volvo drives
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Old 04 May 2004, 13:10   #16
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Rouge Wave

You are correct that I have the shower unit fitted. I think this piece of equipment is a must for all outdrives. Use the search facility on RibNet and look for old posts as I seem to remember a thread that had a URL for a US web site selling the shower for $150 ( ish ). Much cheaper than the one I had fitted !!

Cheers

Mark
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Old 04 May 2004, 16:37   #17
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Quote:
Originally Posted by gavin
Have you had any bother with the volvo drives....
None at all.

It's not been in the water yet.
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Old 04 May 2004, 16:41   #18
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Quote:
Originally Posted by MarkWildey
Rouge Wave

You are correct that I have the shower unit fitted.
Agreed, quite shocked to find even the Stern Power one on my Pacific was warm after half an hour of high speed (comparatively) running and this has a separate exhaust.

Pete
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Old 05 May 2004, 17:52   #19
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Are anyone here familiar with fnm engines, lightweight diesels with saltwater cooling?

Where I live (in Norway) Yanmar is known to be one of the most reliable engines.And they are quite light in weight compared to several others.

But I will always keep a button on Cummins engines, as I think they are as reliable as anything, although they tend to be a bit on the heavy side, but cheaper than Yanmar.

Reliability I think often has a little bit to do with cubes to hp.
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Old 06 May 2004, 06:27   #20
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Cracked Blocks

I have a friend who works for a commercial RIB builder and has some experience of cracked yanmar blocks on military RIBs - apparently they don't like being thrown out of the back of aeroplanes!

Their way of reducing the incidence of block failures is to fit a substantial stainless steel saddle beneath the engine. This is bolted to the engine between the block and the engine mounts. This, apparently, reduces the twisting force that the mount puts into the block thus reducing the tendency for the mount to tear out the side of the block.

I have not seen this myself but it sounds like a good idea.

The more I hear about failed sterndrives and engine blocks the less I mind the cost of petrol for my (very reliable) outboard!

Duncan
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