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    Optimax 115 2005 flywheel nut size?

    Anyone know the nut size? Need to replace.
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    Mercury Optimax 115 2 stroke flywheel grinding

    Turns out original starter was installed wrong. Was grinding for 14 years boat used very little. I removed starter then turned to put corner in pocket where it belongs. That's why I was confused kept putting back the way it was. I also noticed starter bolts too tight telling me has been removed...
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    Mercury Optimax 115 2 stroke flywheel grinding

    Starter new flywheel 2nd hand same part number.
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    Mercury Optimax 115 2 stroke flywheel grinding

    Maybe flywheel not seated properly? I'm going to test everything. Today.
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    Mercury Optimax 115 2 stroke flywheel grinding

    Flywheel new used starter new
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    Mercury Optimax 115 2 stroke flywheel grinding

    Yes properly mounted I'm starting to think starter gear too small?
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    Mercury Optimax 115 2 stroke flywheel grinding

    The engine ran fine did a cleaning of fuel system & injectors much better air Injectors where dirty. Starting it had a bit of a grind would kick in almost? Tried start again then noticed teeth so replaced same part, new starter not original same problem starts grinding. So I stopped. Changed...
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    Mercury Optimax 115 2 stroke flywheel grinding

    This is original starter the gear can free spool so not good. Do other optimax 115 have big gap when teeth engaged? Battery full charge.
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    Mercury Optimax 115 2 stroke flywheel grinding

    I had a guy pull up on starter gear to show how close gear is. The starter is new never touched. I have original starter will compare the gear drive see if wrong thanks. The flywheel that's chewed up has mostly damage on one side but that could be from trying after teeth ground down.
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    Mercury Optimax 115 2 stroke flywheel grinding

    Some pictures that's old flywheel with damage starter gear is new parts.
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    Mercury Optimax 115 2 stroke flywheel grinding

    The teeth barley touch the flywheel? Original factory starter same was barley touching flywheel teeth mainly one side of flywheel until just grinds and removes teeth? Changed parts fully seated grinds right away? I'm a mechanic 30 years never seen such problem there is no adjustment ? What...
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    Mercury Optimax 115 2 stroke flywheel grinding

    Yes original parts and new parts have very little tooth contact? If I try starting flywheel will lose teeth? So need direction? Is this a known problem? Flywheel used but mint same part number starter brand new.
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    Mercury Optimax 115 2 stroke flywheel grinding

    I'm working on the Optimax 115 2 stroke starter was grinding the teeth so put brand new starter and flywheel tried starting and it grinds starter teeth barely touch flywheel teeth ? very strange there is no adjustments? What am I missing? Any help would be great thinking about grinding to move...
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