Great engine just a bit noisy in comparison with a 4 Stroke. Heaps of power down low and the funny thing when I was looking to change over (mine is a 1999 model 135hp ) they tell me the Merc 4stroke is almost as good on economy as the OPti. Basically lighter, more powerful yet still good economy. Downfall noise and you need oil (maybe 100 bucks a year for me) and the spark plugs are expensive but lasts years.
Brett