1969 Evinrude 40 HP Big Twin, Lark Service Repair Manual P/N 4596, Page 65Get this manual

1969 Evinrude 40 HP Big Twin, Lark Service Repair Manual P/N 4596, Page 65

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the pump acts as circulator, enough water being provided by the forward motion of the motor through the waterSee Figure 6-3 Heavy duty water pumps are available for service in extremely sandy or silty