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    yamaha dies when bottom plug wire is removed

    my 40 hp yamaha will run with the top plug wire removed, but it dies immediately when the bottom plug wire is removed. is this normal. any problems to look for.
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    what year is my yamaha 40

    i have a yamaha C40PLRT with numbers 6E9 L336458 Y. would like to know what year it is. was told it was a 1996. thanks.
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    mercury 50 hp what year?

    i would like to know the year model of a mercury 50 hp . the serial number is 3350636. it is a inline 4 cylinder. it has the thunderbolt iginition. the writing on the cowl is blue.
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    50 hp johnson runs good for awhile

    my uncle has a 50hp johnson vro 1998 or 99 model. it will run smooth at 3200 rpms or less. it will run at full speed for awhile then it loses power and starts to buck and jump. when it starts to act up, you can idle it down, turn the key off, start it right back up, and it will run smooth at...
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