2015 Mercury 150 HP 4 Stroke Serial 2B200735

by David R

5 years, 190 hours, cocktail cruiser pontoon in Indiana. Prop contacted lower unit housing and machined it out by a good 1/8 inch or more. Machined internal part, too. Did not hit anything. Prop shaft not bent. Prop Thrust washer in place. Mercury or my dealer cannot tell me what caused it. What could have caused this?

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