1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Repair Manual P/N 507947, Page 140Get this manual
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81!A I) I NU 1
13 mm(12") 16 mm(58'z
& Safety Warning
Cold Roll Steel Heat TreatmentCarburize 0,3-0,5 (0.015-0.020 in deep Quench and harden to 58-62 "" case
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