Mono ? Home › Forum › Ask A Member › Mono ? This topic has 1 reply, 2 voices, and was last updated 3 years, 9 months ago by frankr. Viewing 2 posts - 1 through 2 (of 2 total) oldemtrReplies: 55Topics: 8 June 5, 2020 at 7:35 pm #205000 Anyone know what this is ? frankrUS Member - 1 Year (includes $3 online payment fee)Replies: 6715Topics: 51 June 5, 2020 at 8:09 pm #205006 Mono Manufacturing Company, Springfield MO. 1960’s. Tecumseh powerhead, Clinton lower unit. Very similar to Eskas. Actually, I thought they had Clinton powerheads, but Peter Hunn disagrees. This reply was modified 3 years, 9 months ago by frankr. Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In