MerCstuff. Com

 

1984 thru 1990  Alpha One

 

 

 

 

Alpha One Upper Housing

 

A. Top cover is flat.  Pre - Alpha has a hump on it with a hole thru it.
B. Area around vent hole is smooth.  Pre - Alpha has ribs.
C. Hole for plastic trim tab cover is 1/2 diameter.  Pre - Alpha is 7/16.

This upper housing will fit a Pre - Alpha lower housing but will not fit a Gen II.

 

 

Alpha One Lower Housing

 

A. End of prop shaft has the letter "A" stamped on it.  Pre - Alpha has no letters.
B. End of cavitation plate is almost square.  Pre - Alpha is round.
C. Vertical drive shaft has no preload pin on the top of it.  Pre - Alpha has a pin.

This lower housing will fit a Pre - Alpha upper housing but will not fit a Gen II.

 

 

 

The 2 5/16 diameter below the water pump has threads in it. Pre - Alpha is smooth.

This lower housing will fit a Pre - Alpha upper housing but will not fit a Gen II.

 

 

 

 
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  Last modified: April 19, 2015 
 

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