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2001 MerCruiser 81S Horizon questions

creid

New member
" This engine seems like it sh

" This engine seems like it should be able to put out more than the spec'ed 370HP. Is there a way to sqeeze more horsepower out of this engine? Is there some limitation from the engine being exhausted into the water rather than into open air? Is this engine chipped? If so, are there after-market chips that can be purchased? Any help would be much apprectiated. "
 
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