Quote Originally Posted by ryan_ekubass View Post
just looked online and Mercury, Yamaha, and Evinrude all state to use 87 octane for the new motors with the exception of a few motor types.. I know my Pro XS merc takes 87. So like most people have said check that owners manual or you could inadvertantly cause severe internal damage to your motor....
Can we say BLOWN power head.........

90 Octane in any of the newer motors......Opti, ProXS, Yama, Rude.......pass say 2005 or so generate TOO much heat and will pop them like a tin can.....

BOOM goes the powerhead.

Later,

geo