Mercury XR3Z-6108-GA Piston And Pin Assembly

If carbon deposits or cylinder wear have produced ridges, they must be completely removed with a special tool called a ridge reamer. Failure to remove the ridges before attempting to remove the piston/connecting rod assemblies may result in piston breakage. Do not let the tool cut into the ring-travel area more than 1/32-inch.

Check for piston corrosion indicating coolant leakage and correct the causes.

Remove the cap from the end of the number one connecting rod, remove the original bearing inserts, and wipe the bearing surfaces of the connecting rod and cap with a clean, lint-free cloth. They must be kept spotlessly clean.