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Ok i bought this boat last year had the carbs cleaned the owner told me to run 100-1 oil/gas mix i thought that was not enough so i ran 50-1 the problem i have is idel spit and spuders so today i poured out what gas i had in the tank and mixed a batch 100-1 and she ideled very good i cant find anything on the net that makes me feel better about running 100-1 any ideas she is a 1995 sweetwater pontoon with 1995 yamaha 55hp model # C55TLRT 663 L 722581 Y at full speed she runs great on 50-1 just want idel thanks
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fix your carb issue and STAY with 50/1. -
I have a 15hp johnson, mid-80's, that is 100:1. Even has a sticker on the side to that effect. It's the only 100:1 I've ever seen, and I've had it for 10+ years. Only trouble I ever have is from not running gas out when I come off the water.Comment
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I believe Yamaha tried 100:1 for a short time, and while it did lubricate the motor/bearings at that ratio, there were issues with corrosion protection of crank/bearings/shiny parts internally...so they went back to 50:1...that's pretty much the accepted ratio. Good Luck!
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