I've got 860 hous on my Yammy F250 and it has been flawless. I'm not sure if you meant that you're looking for a 200 four-stroke, but I would not recommend the F200 or F225 over the F250 provided your hull is rated for at least 250 hp. In my experience, the F250 has not only more power than the 225 (more than 25 hp, it seems) but it also delivers the power faster. And the F200/F225/F250 series all weigh about the same. Drawback is the F250 needs 87 octane fuel.
For comparison, my 258's dry weight is 4320 lbs and she carries 127 gallons of fuel. With full fuel and fishing or diving gear, I get a 27 mph cruise at 4,000 rpm, getting 3 mpg in calm water. WOT is 42 mph at 6,000 rpm.
Rob