Evinrude / Johnson outboard washer

Lower unit drain screws require Johnson outboard washers.
Comes in pack of 5.
Washers are not intended to be re-used.
Always install a new washer when re-installing drain screw.
Aviation gasket compound required on paper style washer / gasket
(P/N 31170) for proper seal, only a coating of grease is required on nylon washer (P/N 31171) when pressure testing.
*Pressure test at 20 lbs
OEM 307552 (paper), P/N 311598 (nylon)
Exploded view Johnson lower unit drawings
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