1998 Johnson Evinrude "EC" 2 thru 8 Service Manual, P/N 520202, Page 142Get this manual
o C03082 3144
[] 9Take piston diameter measurement Va in(3 mm) above the bottom edge of the pistonfi rst
10Take at least two measurementsThe first measurement should be in line with the wrist pin bore11The second measurement should be 90 away from the
12The difference between the two measurements is the out-ofroundness and must be no more than 0.002 in (0,05 mm)13Refer to Engine Specifications, Section for piston dimensions
14Place each ring, separately, in its respective boreUse piston to square the ring in the cylinderUse feeler gauge to measure the ring end gap 2,2.3,3.3The ring end gap must be within 0.0060.014 in(0,150,35 mm) thruThe ring end gap must be within 0.0050.015 in(0,130,38 mm)1529
[]] 15Use feeler gauge to check groove side clearance of the piston rings Install each ring on its pistonWith the ring fully seated in its groove, make several checks around the piston 2,2.3,3.3The side clearance must not exceed 0.0026 in (0,065 mm) thruThe side clearance must not exceed 0.004 in(0,10 mm)16.2,2.3,3.3Measure the connecting rod deflection at the small end of the rod to determine the amount of wear of the crankpin and connecting rod bearing The connecting rod deflection is 0.0220.056 in(0,61,5 mm)Replace crankshaft assembly if deflection exceeds tolerance