Mid 80's yamaha 50hp not going full speed at full throttle

iplayguitarhero

Recruit
Joined
Jul 27, 2008
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1
okay so i bought this motor and it was going probably around 30 mph fine then one day the oil gear housing broke and killed one of the coils so i took off the flywheel and replaced the parts and ever since then my boat is only going about 10- 15 kms and hour at full throttle. I replaced spark plugs checked the carbs and they are clean as a whistle put in carb cleaner in gas anyway im mixing 200 ml of oil to 10 l of gas changed the lower gear oil and it was clean not milky and im frustrated now my boat is like a slug and the waves are moving faster than i am help plzzzzz.:(
 
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