Originally Posted by jwalker
Isn't the current move to 4 stroke engines by some manufacturers an attempt to adhere to future emission legislation which they fear they are not going to manage to do with 2 stroke motors?
That's what I always thought as well. I have done a quick Google & can't find a clear explanation of the future legislation.
What I do know however is that the 'rude Etec 2 stroke engines were the first ever designed to meet 2006 EPA, European Union (EU) and 2008 California Air Resources Board three star ultra-low emissions standards. If 2 stroke efficiency continues to improve then surely they will meet future legislation?
As for Roy's comment about Honda strimmers - well, they would say that wouldn't they? After all, Honda committed themselves to 4 strokes many years ago and perhaps feels the need to justify their stance. They used to claim that their 4 stroke outboards were 50% more fuel efficient that the equivalent 2 stroke. Having had experience of a BF225 & 250 Etec on the same boat I can confirm that this is complete bollox...
Just my thoughts.