Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 241Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 241

CYLINDER BLOCKCR AN KCASE
Cylinder
MEASURING CYLINDER BORE 1Measure the cylinder bore diameter at three locations in both and axis2If the cylinder bore is beyond the standard limits listed in the tables below, it will be necessary to re-bore the cylinder to accept the oversize pistonNOTE: Measure at three locations (LI, L2, and 4) in both and Yaxis (0 1-6JL, =0.8 in(20 mm) L2 =1.5 in(40 mm) 4=2.4 in(50 mm)

1Inspect:
aWater jacket for mineral depositscorrosion, clean if necessarybInner surface for score marks, repair if necessary2Measure bore diameter with cyli nder gauge, re-bore or replace if necessaryy

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