My Dad called today and said his motor sounds like it is 'missing' at WOT. Said it idle's fine, run's good at low RPM's but when he opens it up it sputters a bit. He said he changed the plugs, has fresh fuel and has run seafoam....looking for some other idea's. Someone told him to try Octane Boost...I told him to hold off for now. So, any idea's???
IF IT ACTS LIKE MISFIREING AT MID TO HIGH RPM AND IDLES GREAT,most likly power pack time
2006 RANGER 519VX
200HP MERCURY OPTI-MAX
Sole member of " THE FISHERMEN FOR LIFE" a fisherman that knows one can make the difference!!
Have him check and make sure none of his plug wires are touching the block.
A Buddy of mine just had his power-pack replaced for the same thing, 150 evinrude it was #4 cylinder acting up.
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