1996 Johnson Evinrude "ED" 40 thru 55 2-Cylinder Service Repair Manual, P/N 507124, Page 312Get this manual

1996 Johnson Evinrude "ED" 40 thru 55 2-Cylinder Service Repair Manual, P/N 507124, Page 312

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IMPACT RELIEF 1 When the engine hits an underwater obstruction, extreme pressure develops above the piston

2 The extreme pressure must be vented and the cylinder rod must extend to allow