do you know this yamaha powerhead?

droptheline

Petty Officer 2nd Class
Joined
May 2, 2008
Messages
109
does anyone know what powerhead this might be? it was given to me along with an 02 intermediate housing for a 50hp but this block doesnt fit it. powerhead has 10 bolt holes when the int.housing only has 8 for a 50hp. would like to get it put togather but dont know what it is. block is stamped 88033. its alittle heavier then my junk 50 block 2. but it is a 3cyl/3carb setup.
Thanks
 
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