I have a 2000 Nissan 18 hp 2 stroke with electric start. Nissan & Tohatsu are the same except the stickers.
This motor has been run hard for almost 10 years. Some years, it has been on the water either fishing or duck hunting 60 days out of the year. Has not been babied, only had the lower unit oil changed twice, never changed the impeller, plugs once and one carberator cleaning after I got water in the fuel. Have chewed up 4 aluminum props slugging through shallow clam & oyster shell infested muck & sand with no damage to the lower unit seal or shaft. Not one single repair in 10 years.
I simply love this engine. I cant say enough good things about it. I've never heard a bad word about Nissan or Tohatsu outboards.
If the 4 strokes are only half as good, you would still be getting a bargain.