Re: Late 50’s Johnson 18 hp compression? Home › Forum › Ask A Member › Late 50’s Johnson 18 hp compression? › Re: Late 50’s Johnson 18 hp compression? BuccaneerUS Member - 1 Year (includes $3 online payment fee)Replies: 7495Topics: 1072 May 18, 2018 at 8:45 pm #76270 Thank you knowledgeable gentlemen! Don’t think I’d credit him a whole lot on the trade, but I suppose it has potential! Prepare to be boarded!