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Help with a 67 johnson 20 horse.
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<blockquote data-quote="Frank ZX" data-source="post: 38915" data-attributes="member: 591"><p>I would not run no less than 32:1. 32 parts gas to 1 part oil.You will get more power(less frition,and less engine wear).The maunal probably say's</p><p>50:1,but they want you to buy a new engine after the warranty is over.</p><p>Now to get kinda techinical,the richer in oil, the leaner in fuel,so you may need to adjust the mixture screw on the carb.</p><p>My motocross bike calls for 40:1,but I run 20:1.I did have to rejet the carb,but I will get many times the life on the origional top end.</p><p>99% percent of the people you talk to will tell you to run 50:1,But,rememberThe oil in the fuel is what lubes the internals in your outboard,and gas don't lube too well.</p></blockquote><p></p>
[QUOTE="Frank ZX, post: 38915, member: 591"] I would not run no less than 32:1. 32 parts gas to 1 part oil.You will get more power(less frition,and less engine wear).The maunal probably say's 50:1,but they want you to buy a new engine after the warranty is over. Now to get kinda techinical,the richer in oil, the leaner in fuel,so you may need to adjust the mixture screw on the carb. My motocross bike calls for 40:1,but I run 20:1.I did have to rejet the carb,but I will get many times the life on the origional top end. 99% percent of the people you talk to will tell you to run 50:1,But,rememberThe oil in the fuel is what lubes the internals in your outboard,and gas don't lube too well. [/QUOTE]
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