If you can, find a Yammie 8hp 2stroke with the high thrust leg, shifts along an SR26 at 7 knots. Best out board I've ever used on a race boat. 90% of the 8.5 multi fleet use them. Mines never been flushed or had a water pump replaced in my ownership. Motored to Auckland and the bay a couple of times in no wind. Bonus is it has a rectifier so I charge the battery and use the auto pilot. Only thing to ever break was the gear shift lever. The key is to run them 50:1 and run them out of fuel after use.