1960 40hp Evinrude Big Twin

[Garys 68]

I'm restoring an old boat with a 1960 Evinrude. It's been sitting a long time, so just trying to get it running. I noticed there was an opening on the port side of the lower unit, just above the cavitation plate. It looks like a plate should be screwed over it. Anyone know what the function of that is?

 

[hardwater fisherman]

It's the bypass plate for the water intake..

 

[Garys 68]

It's the bypass plate for the water intake..

Bypass plate? What's it's function? I couldn't find any reference to it in the service manual.

 

[hardwater fisherman]

The water intake is in the snout above the propeller .. The small holes in the bypass plate are for when the motor is in reverse. The plate has to be in place for the water to reach the water pump..

There may be another function but I do no know..

 

[hardwater fisherman]

Some models have scoops some just holes..

 

[Garys 68]

Thanks all, another item to order.