I am surprised there are no comments on the 22c.i. Johnson 25. I don’t know whether that is bad or good. I looked up the 62 Merc 250 and surprisingly it is 22 c.i. The Nissan option sounds interesting. I have an elec. Nissan 15 I use for Salt water use. It is an unbelieveable motor. It is faster than the Johnson 18. I like it a lot 🙄