Mercury Optimax 75, 90, 115, DFI starting year 2004 service manual., Page 332Get this manual

Mercury Optimax 75, 90, 115, DFI starting year 2004 service manual., Page 332

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POWERHEAD

MEASURING PISTON ROUNDNESS
Piston has barrel profile shape and is not true diameter1 Using micrometer, measure dimension at location shownDimension (a) should be 91.9734 0