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  1. M

    Horsepower Rating

    I have a blown 150 on my 20'Center console, deep V boat. Can't remember how much it weighs but with a full 84 gallons of fuel I think its somewhere in the 2500lbs bracket. Less people and gear of course.<br /><br />I thought about replacing the engine rather than rebuild the 150. The 150...
  2. M

    Blown Merc 150 BlackMax

    Dropped the top piston ont he left bank last weekend. All other cylinders are dead even at 110psi compression. Piston in question doesn't even show up on compression gage.<br /><br />Questions is: Replace one piston or all at the same time? It would seem the best thing to do is replace them all...
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