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1954 Mercury Mark 20 Oil Ratio
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<blockquote data-quote="jpfieber" data-source="post: 399895" data-attributes="member: 546"><p>Please forgive my ignorance, I'm pretty new at the boat motor thing. I have 2 motors for my 12 foot tin, a 1954 Mercury Mark 20, and a 1982 Mercury 7.5. From what I've found, I should be using 50:1 for the 1982, but I'm uncertain about the Mark 20. My mechanic said 32:1. I found a doc on the web that seemed to suggest Mercury motors of that size and time period were 20:1. Anyone know for sure? What would happen if I ran the wrong mixture through the motor? I'd love to simplify and have one tank that works for both, any ratio that would satisfy both?</p><p></p><p>[ATTACH=full]80371[/ATTACH]</p><p>[ATTACH=full]80372[/ATTACH]</p></blockquote><p></p>
[QUOTE="jpfieber, post: 399895, member: 546"] Please forgive my ignorance, I'm pretty new at the boat motor thing. I have 2 motors for my 12 foot tin, a 1954 Mercury Mark 20, and a 1982 Mercury 7.5. From what I've found, I should be using 50:1 for the 1982, but I'm uncertain about the Mark 20. My mechanic said 32:1. I found a doc on the web that seemed to suggest Mercury motors of that size and time period were 20:1. Anyone know for sure? What would happen if I ran the wrong mixture through the motor? I'd love to simplify and have one tank that works for both, any ratio that would satisfy both? [ATTACH type="full" alt="20150823_163102.jpg"]80371._xfImport[/ATTACH] [ATTACH type="full" alt="00q0q_2e6EAKDNfok_600x450.jpg"]80372._xfImport[/ATTACH] [/QUOTE]
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1954 Mercury Mark 20 Oil Ratio
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