2006 Johnson SD 3.5 HP 2 Stroke Outboard Service Manual, PN 5006562, Page 87Get this manual
POWERHEAD INSPECTION Place each ring, separately, in its respective boreUse piston to square the ring in the cylinderUse feeler gauge to measure the ring end gapMeasure the connecting rod deflection at the small end of the rod to determine the amount of wear of the crankpin and connecting rod bearing
Deflection
Model 3.5
Piston Ring End Gap 0.0060.014 in(0.150.35 mm)
The connecting rod deflection is 0.022 to 0.056 in(0.6 to 1.5 mm)Replace crankshaft assembly if deflection exceeds toleranceUse "V" block and two dial indicators to check crankshaft off-center at upper and lower journalsRotate crankshaft on blockMovement of indicators must not exceed 0.001 in(0,05 mm)Replace crankshaft assembly if movement exceeds this dimension