1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 29Get this manual

1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 29

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3 After initial propeller installation, the following common conditions may require that the propeller be changed to lower pitch:
Warmer we ather and gre at humidity will cause an PM lossO perat