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Lower unit compatibility? 76 vs 78 35HP

jccinohio

New member
Looking at buying a '76 35HP as parts for a '78 35HP.. 0389729 is the part I need, but the parts store for the '76 shows this..

0389729 ← 0388258

I guess the original part (388258) was superseded with the 389729? If I buy the '76 and it has the superseded part, will it fit on the '78? Looks like a lot of parts in the case were superseded so wondering if there's essentially 2 different gearboxes, and the earlier one won't work?

'76 is a 35R76S
'78 is a 35E78R
 
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