Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 87Get this manual

Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 87

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Use piston ring expander tool (91-24697) and install piston rings (a) on piston Lubricate cylinder bores with light oil
IMPORTANT: Piston rings ends must be properly located over locating pins o