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    Shift Cam (grooved or not?)

    On a '89 Mercury 100 OB, the shift cam has three positions. Should the shift cam have have a groove in the middle where the sliding clutch makes contact? or is this a sign of excessive wear on this piece? I see there are three distintive positions marks on the shift cam... the top, which seems...
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    Sliding Clutch Dog

    HELP! I have an 89 Mercury 100HP Outboard. A month ago my lower unit cracked when my friend lowered unit(LU) too far when we were washing down... I have since then gotten the LU welded and I have spent the past two days trying to get it back on my boat. I manage to get it on but REVERSE will...
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    89 Merc 100HP Hard Idle and Backfire

    I have a 89 merc 100hp outboard (Serial # C139951)that runs good in forward and reverse. It runs very rough and backfires only when in idle. I have had the compression checked and it was 110 on the top two plugs and 105 on the lower two. <br /><br />I was told that it might caused by dirty...
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