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    1991 Mercy 115 hp carbureted...good motor?

    My brother is considering buying a boat with a 1991 carbureted 115 hp Merc on it. Are these good motors? Are there any common problems with them? What should the compression be to be considered "good". The seller has claimed to have had a compression check done recently. Anything specific he...
  2. B

    2004 150 hp Optimax speed and RPM loss. TPS?

    Hello I'm new to the board. This is my 1st post so take it easy on me. I bought my boat new in 2004. It is a 18' Nitro bass boat with a 150 optimax on it. Within the last year or so I've noticed about a 400 rpm and 6-7 mile per hour speed loss. I'm only able to top out at about 5100 RPM now...
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