Uh Oh! I've upset the Optimax evangelist...
Stu - I never "advised the guy not to buy one of the best engines out there", but gave some objective input on the overall cost of running different outboard types. You've put 500hrs onto an engine which has performed faultlessly for you, which is an excellent recommendation whichever way you look at it, but is that considered exceptional or normal from modern machinery? And remember that the original question was about running costs - so it wouldn't be realistic to ignore the cost of two-stroke oil.
Filling the 2-stroke oil is one of my hated jobs at the moment and I would recommend that anyone rigging a 2-stroke makes sure that the reservoir is very easily accessible.
Now dont' get me wrong, I also think that the Opti is a great engine - I spent lots of hours driving a very similar Scorpion to yours last season, Stuart. The acceleration was exciting, and they certainly sound the business. I just reckon that overall setup and rigging of the boat is as important as pure grunt.
I could be a Yamaha evangelist, and lots of people are, but I have only put about 70hours on mine in which time I EXPECT it to perform faultlessly. So I'll save that for later! And the Yam. 150hpdi is even heavier than any engine we've talked about in this thread, so not a good recommendation in my opinion.