Mercury Mariner Outboards 2.2 / 2.5 / 3.0 Service Shop Manual, Page 43Get this manual
dLocalize stroking in the smallest diameter until drill speed is constant throughout length of bore Expand stones, as necessary, to compensate for stock removal and stone wearStroke at rate of 30 complete cycles-per- minute to produce best cross-hatch pattern Use honing oil generouslyeThoroughly clean cylinder bore with hot water and detergent Scrub well with stiff bristle brush and rinse thoroughly with hot waterIt is essential that good cleaning be performed If any of the abrasive material is allowed to remain in the cylinder bore, it will cause rapid wear of new piston rings and cylinder bore, in addition to bearingsAfter cleaningbore should be swabbed several times with engine oil and clean cloththen wiped with cleandry cloth Cylinder should not be cleaned with kerosene or gasoline Clean remainder of cylinder block to remove excess material spread during honing operation 4Measuring Cylinder Bore NOTE: .020 in(5mm) oversize piston is available to enable reboring of standard cylinder boreaUsing an inside micrometer, take two measurements at topcenter and bottom of cylinder as shown Piston