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    Spark Plug Recommendation Question

    With my Yamaha 90 hp I troll primarily when fishing. The spark plugs tend to get somewhat oily/wet looking and also some minor carbon buildup. The owner's manual recommends NGK B8HS-10. Would it be preferable for me to use a hotter spark plug (B7HS-10) based upon the slow trolling that I do...
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    Yamaha 90hp Head Torque Requirement?

    I would like to check the torque of my Yamaha 90 hp head bolts but do not know what the torque pounds requirement is? Can anyone provide that to me? Thanks in advance.
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