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1977 Evinrude 85hp V-4 Prop question

Trapset

Member
Model # 85793S

Currently has 13 3/4 x 15 and runs nice at WOT, 5200rpm. I want to get a new prop for it but prop chart on this site says 13 1/2 rather than 13 3/4. I’m afraid RPMs would jump over the 5500 recommended. Any problem with just ordering the 13 3/4 x 15?
 
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