Mercury Optimax 115, 135, 150, 175, DFI year 2000 and up service manual., Page 314Get this manual

Mercury Optimax 115, 135, 150, 175, DFI year 2000 and up service manual., Page 314

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POWERHEAD
MEASURING PISTON ROUNDNESS
Piston has barrel profile shape and is not true diameter1 Using micrometer, measure dimension "A" at location shownDimension "A" should be as indicated