8-25LOWR Lower unitShimming (regular rotation model)Shimming workflowTIP:• Shimming is not required if the backlash is within specification.• Shimming is required when assembling the original inner parts and a new lower case.• Shimming is required when replacing the pinion, forward gear, reverse gear, bearings, shaft, andhousing.Remove the water pumpassembly.Measure the backlash beforedisassembly.Withinspecification? Shimming is not required.Disassemble the lower unit.Select the pinion shims (T3).Assemble the lower unit.Measure the backlash.Withinspecification?Install the water pumpassembly.Adjust the forward gear shimthickness (T1) and reversegear shim thickness (T2).YESNONOYES