1978 70Hp Evinrude Lower Unit Long Shaft or Short Shaft

[HBF4]

How do I measure the shaft to determine if it is a short shaft or long shaft? Thank you.

 

[tashasdaddy]

Re: 1978 70Hp Evinrude Lower Unit Long Shaft or Short Shaft

measure form the where the motor sits on the transom down to the cavitation plate. the distance should be relatively equal to the distance from the top of the transom to the bottom of the hull. post your measurements.

 

[HBF4]

Re: 1978 70Hp Evinrude Lower Unit Long Shaft or Short Shaft

The lower unit isn't on a motor. Should I measure from the top of the shaft to the top of the impeller housing, or from the top of the shaft to the bottom of the impeller housing.

 

[ezeke]

Re: 1978 70Hp Evinrude Lower Unit Long Shaft or Short Shaft

Sure, what is that measurement to the bottom of the impeller housing? <br /><br />If it is about 17" it is short shaft, called 15" midsection or exhaust housing.<br /><br />If it is about 22" it is long shaft, called 20" midsection or exhaust housing.