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Old 01 July 2014, 15:17   #21
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OK, sounds like usage is the problem here. I don't go out in the rough stuff, can't dive in it anyway.

Jason
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Old 01 July 2014, 15:44   #22
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Originally Posted by matt h View Post
The suzi 50 only pushed out 42 at the prop but the twatsoo does 50hp so you will feel the difference.

Why do they do this....?

I used to ride motorbikes and some manufacturers would quote BHP at the crank....some at the rear wheel..?


Pretty sure this thread will end up in the bilges as another Etec vs The rest of the world debate.


There.......I said it.

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Old 01 July 2014, 15:53   #23
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Originally Posted by Landlockedpirate View Post
Yep, its a fair point. But the 15hp, 4 stroke Yamaha is now just 39kg, down over 12kg on its lardyarse previous version.
So they are getting a lot closer.
Is this a new model? The 15HP 4 stroke on Yamaha's website (F15C) is still 51kg? Any more info?

Cheers

Chris
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Old 01 July 2014, 16:29   #24
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Yes the new four stokes give more pros than cons compared to 2 strokes. The verado 200 has as much poke as the opti but is much smoother and happier at low revs...
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Old 01 July 2014, 17:08   #25
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Yes the new four stokes give more pros than cons compared to 2 strokes. The verado 200 has as much poke as the opti but is much smoother and happier at low revs...
But much more costly to purchase.
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Old 01 July 2014, 17:10   #26
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Originally Posted by chris123 View Post
Is this a new model? The 15HP 4 stroke on Yamaha's website (F15C) is still 51kg? Any more info?

Cheers

Chris
Its the number thrown at me by a Yam dealer when I was in the States earlier in the year. I cant find any reference to it on the net, but he mentioned it was part of the weight saving that has been applied to the mid range stuff.

Not convinced its a real number, saving 20% on the existing weight is a big ask.
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Old 01 July 2014, 17:10   #27
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Originally Posted by Bigtalljv View Post
Why is hole shot so important? It's always the first thing 2 strokes are said to be superior in. when I go in my boat it's usually to go somewhere. the hole shot is 8 seconds of a day trip. Why do I care if it's 8 seconds or 12?

I'm running a 250hp 4-stroke so maybe this is a portable engine conversation?

jason
Hole shot is important when you don't have so much excess power.

I would guess that 250hp on your 7.5m is plenty of power.

But start looking at 135hp or maybe 150hp on a 7m and all of a sudden the "holeshot" or low / mid-range torque is more important.
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Old 01 July 2014, 18:09   #28
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Of course the direct injection 2 strokes are completely different, but even they barely meet the emission standards put forth today.
Really Here we go again
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Old 01 July 2014, 18:40   #29
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Really Here we go again
Do you have emission standards for boats in the UK?

A new boat sold in the USA must meet an emission standard and many today are coming with catalytic converters on them. Our emission standards being far stricter, or consider it better for the environment, are the reason you won't see hardly any diesel cars as they can't burn clean enough to pass our environmental protection laws aka the E.P.A. Since this is a forum that is global, we all must look at the world wide responses. What happens in the U.K. and the USA are two separate issues.
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Old 01 July 2014, 19:00   #30
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Do you have emission standards for boats in the UK?

A new boat sold in the USA must meet an emission standard and many today are coming with catalytic converters on them. Our emission standards being far stricter, or consider it better for the environment, are the reason you won't see hardly any diesel cars as they can't burn clean enough to pass our environmental protection laws aka the E.P.A. Since this is a forum that is global, we all must look at the world wide responses. What happens in the U.K. and the USA are two separate issues.
Necessity is the mother of invention

Once your gas prices hit $10 per gallon, you will find a lot more oil burners on your roads. Diesels over here are generally cleaner than petrol engines (thanks to some really clever tech) and actually have lower tax bands because of it.

Take the 6 cylinder 3.0L BMW engines. The diesel is more powerful, more economical and cleaner than the petrol.

Europe have had emmisions targets longer than the USA for road engines, marine restrictions came in in 2006, just like you.
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