?-20 Aluminum locknuts ? engine to transom -

TooBizzy

Cadet
Joined
Oct 23, 2009
Messages
20
Guys,

When installing the 4.3 Vortec back in my Pontoon, one of the ?-20 Aluminum locknuts stripped that attaches the rear of the engine to the transom.

Are these aluminum locknuts critical, or can you replace with steel or stainless. The boat dealer closest to me does not stock these nuts but are telling me that they need to be used! I can?t believe they wouldn?t stock these since they would/could strip so easily. Anybody know the jist of these aluminum nuts?
 
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