Mercury Optimax 115, 135, 150, 175, DFI year 2000 and up service manual., Page 571Get this manual
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LEFT HAND NON-RATCHETING
aAdaptorBearingWasherSpringNut; thread nut all the way onto boltBoltSet ScrewSleeve; holes in sleeve must align with set screws
3 Align adaptor on driveshaf