OMC Stern Drives And Motors 1964-1986 Repair Manual., Page 512Get this manual
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FORD Limit Valve Head Diameter htake Exhaust Valve Face Angle Vdve face Runout Maximum
7 I-79 1.790 !90-2101.34
17IClJj.34
7 I-79 1,790 190-2101.34
681.69