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Old 31 January 2007, 13:32   #1
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Yamaha 350 HP 4stroke

Last weekend my dealer told me Yamaha is going to introduce a 350HP four-stroke before this summer.

Is there someone who can confirm this?
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Old 31 January 2007, 16:18   #2
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The men a the yamaha stand at London said it will be out this summer
But its big and about half as heavy again as the 250, he said its for the American market, he also said that it should have the cableless controls like
the Etec.
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Old 31 January 2007, 16:20   #3
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Sorry what i ment is that there main market will be the USA.
(cheep fuel)
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Old 31 January 2007, 16:43   #4
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http://www.boats.com/content/boat-ar...ontentid=19202

Yup it's true - a 5L V8 with duo prop apparently. Bet it will be seriously heavy as it's a 4 stroke as well.

Makes you wonder where's the progress - you could buy big V8 outboards back in the 70s!!!
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Old 01 February 2007, 02:36   #5
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It will weight approximately 350kg...
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Old 01 February 2007, 03:27   #6
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First V8 outboard. 1963, though perhaps not a production model.
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Old 01 February 2007, 03:28   #7
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I assume this is another one of your disposable comments.

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Originally Posted by codprawn View Post
Makes you wonder where's the progress - you could buy big V8 outboards back in the 70s!!!
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Old 01 February 2007, 10:42   #8
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I assume this is another one of your disposable comments.

May I ask what was wrong with that comment - or are you just determind to find fault?
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Old 01 February 2007, 12:17   #9
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May I ask what was wrong with that comment - or are you just determind to find fault?
There was absolutely nothing wrong with your comment.
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Old 01 February 2007, 12:19   #10
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Oh right, so technology hasn't moved on since the 70's.
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Old 01 February 2007, 12:58   #11
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You'd have to check the patents, a company's ability to economically produce said technology is whole different matter. Generally the technology exists a long time before it enters the marketplace. Rudolf Diesel had load of good ideas likewise Daimler and Benz; turbos, superchargers etc.

I liked the 70s bras hadnt been invented then ofcourse...
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Old 01 February 2007, 14:07   #12
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Oh right, so technology hasn't moved on since the 70's.
The point I was trying to make is that you could buy a big V8 outboard back in the 70s - and it's taken until 2008 for them to reappear!!!

Engines haven't improved that much anyway. They had 4 valves per cylinder - twin sparks -variable valve timing etc etc back in the 20s. The Rolls Royce Merlin is still an amazing engine and is still used in racing even now.

Efficency has improved due to modern electronics etc but that's about it. And I suspect at WOT there won't be that much difference between any 350hp outboard!!!
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Old 02 February 2007, 07:13   #13
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The Rolls Royce Merlin is still an amazing engine and is still used in racing even now.

Love to know what racing uses one (or more????!!!!!!!!) of those!
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Old 02 February 2007, 07:16   #14
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Tractor Pulling?
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Old 02 February 2007, 07:44   #15
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The point I was trying to make is that you could buy a big V8 outboard back in the 70s - and it's taken until 2008 for them to reappear!!!

Engines haven't improved that much anyway. They had 4 valves per cylinder - twin sparks -variable valve timing etc etc back in the 20s. The Rolls Royce Merlin is still an amazing engine and is still used in racing even now.

Efficency has improved due to modern electronics etc but that's about it. And I suspect at WOT there won't be that much difference between any 350hp outboard!!!
Cod, that is a somewhat simplistic take on it, I tend to agree the basic concept has not changed all that much BUT...
Reliability has come a long way since the 70's with cars, boats and motorcycles especially, consider what destroyed the British motorcycle industry, the japanese bikes were much more reliable and less maintenance intensive. Increased horsepower, reliability, lower emissions are some benefits of modern engine technology.
Incidentally... I have always been a fan of British bikes, have a Triumph in the garage right now as a matter of fact, the old Norton, Triumph and Beezers,now they had style! The Commando, the Bonneville... those were some pretty bikes.. Nothing quite like firing up a British twin! Whoops! getting out on a tangent here, what was this thread about?
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Old 02 February 2007, 13:05   #16
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Tractor Pulling?
Yup - also air racers and unlimited hydroplanes - lots of events where loads of power is needed and there are no silly rules to get in the way!!!
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Old 02 February 2007, 13:11   #17
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Cod, that is a somewhat simplistic take on it, I tend to agree the basic concept has not changed all that much BUT...
Reliability has come a long way since the 70's with cars, boats and motorcycles especially, consider what destroyed the British motorcycle industry, the japanese bikes were much more reliable and less maintenance intensive. Increased horsepower, reliability, lower emissions are some benefits of modern engine technology.
Incidentally... I have always been a fan of British bikes, have a Triumph in the garage right now as a matter of fact, the old Norton, Triumph and Beezers,now they had style! The Commando, the Bonneville... those were some pretty bikes.. Nothing quite like firing up a British twin! Whoops! getting out on a tangent here, what was this thread about?
Remember a lot of the most succesfull engines are based on very old designs. I think some of the big Volvo and Mercury inboards date back to the 50s or 60s. Prob the best marine diesel ever were the Gardners and they are still plodding along very nicely - they will outlast most of the modern stuff.

Same with guns - many of the designs are truly ancient. Of course a Glock or a Sig is a great gun but are they REALLY that much better than a Browning Hi Power that was designed in 1907? The Browning 50cal dates back to the 1920s - maybe even earlier.

Many things these days aren't quite as advanced as people would like to think!!!
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