
Originally Posted by
Captain_Rightfoot
The first article makes no reference to direct injection 2 strokes so I would imagine it's old or just useless.
I'm not sure how much you've been following the outboard market of late, but if all 2 strokes are to be banned then you better tell all the major manufacturers about it because their primary development and marketing focus is on direct injection 2 strokes.
These motors use almost no oil, and less fuel than 4 strokes. As ever they are still lighter and cheaper than 4 strokes.
You should look into them... they really use virtually no oil, and definitely less than a 4 stroke does if you include their oil change. As I said earlier, the e-tec range (and probably others) can operate indefinitely at reduced power settings with no oil.
Real world figures from our club (owners not agents) show that one brand of the new injected two strokes matches the 4s for fuel usage but the others are still behind. You also have to use the synthetic oils to get the emissions levels they advertise, and if the user decides to change to a cheap oil, the computer has a setting which effectively doubles it's oil ratio, making the expensive oil not so expensive…. They all are however miles better than carby 2s.
The 4s do suffer from high servicing cost and weight– I have 3 of them. The 4s are also more sensitive to prop selection and boat trim - it's got to be right to get the most out of them.
For my tinnie (currently Honda) - I wish the little e-tecs were out when I set it up…
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