Mercury Mariner Models 135 150 175 200 Service Manual, Page 535Get this manual
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LEFT HAND NON-RATCHETING
0.025 in(0.635 mm) With 0.018 into 0.027 in(0.460 mm 0.030 into 0.050 in(0.762 mm Tool 91-12349A2 using to 0.686 mm) Pointer on line to 1.27 mm) Disc #2 and Flat #7 mark