1998-2006 Yamaha F20/F25 Outboards Service Manual, Page 197Get this manual
CRANKSHAFT ASSV AND
Big-end oil clearance 1Measure: Big-end oil clearance Out of specification bearings as set
Replace the
Big-end oil clearance: 0.0200.052 mm (0.00080.0020 in)
Install the bearings in their original positionsIncorrect oil clearance measurements can lead to engine damage Clean the bearings and bearing portions of the connecting rod Install the upper half of the bearing into the connecting rod and the lower half into the connecting rod cap
Align each bearing projection with the notch in the connecting rod cap and connecting rod Put piece of Plastigauge onto the crank pin Assemble the connecting rod halves onto the crank pin