I run a 2008 25 HP Mercury 4 Stroke on my 1448 Tracker Grizzly. I believe the Tohatsu is the same exact motor. I have had it for 2 years, no problems at all.
Pushes me great, on a glassy morning I can hit 30mph (measured with my phone GPS) with 2 friends, me, cooler, bait bucket, and gear.