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    How to make my 9.9 a 15?

    I have a 2004 johnson 9.9 four stroke that I need more power out of. Can anyone tell me if I just need a carb off a 15hp or is there more that needs done? Thanks in advance
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    Did I fry something??

    I have a 2004 johnson 9.9 four stroke that i was mounting and when i flung the battery cables toward the battery, one of the leads hit the opposite tterminal on the battery and caused some smoking and burnt wire smell. I don't know if the positive lead touched the negative post or vise versa? I...
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    Compression on a 1978 Johnson 150

    Anyone know what the compression should be on this motor? It has 90# on every cylinder. I have talked to some that say, put the money in it keep it going and others that say that low of compression is no good. Just want to know if I should spend the money to put new electrical components on it...
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