1974 Johnson 135 HP Outboard Motors Service manual, Page 64Get this manual
STRIPES SIZE}
SELECTING THE CORRECT RINGCrankshaft replacements do not require ring fitting ince each new service crankshaft is already fitted with six seal ringsInstances in whi ch seal ring has been broken aCCidentally during repairs are easily remedied by measuring the thi ckness of the original ring with 0-1 inch micrometerAlways measure the ring near its out er edgeUpon det ermining the thi ckness of the ld ring, install new ing that matches this thicknessThree different thickness seal rings are available(See SEAL RING IDENTIFICATION CHART SEAL RING IDENTIFICATION CHART SERVICE PART NOWIDTH IN INCHES IDENTIFICATION MARKINGS 519244 519250 519197 .1565 to .1570 .1575 to .1580 .1 585 to .1 590 ONE white stripe TWO white stripes THREE white tripes
' TWO WH ITE STRIPES (MIDDLE SIZE)