I RECENTLY PURCHASE A SEASWIRL 1851 DC BOAT WITH A 150 HP YAMAHA 2003 ENGINE. IT RUNS GREAT BUT I WOULD LIKE TO GET A 150 FOUR STROKE ENGINE ON IT DOES ANY ONE KNOWS WHAT WOULD BE THE FUEL SAVINGS IS IT WORTH SWITHCHING AND HOW MUCH WOULD I GET FOR MY 2 STROKE ENGINE. MY MANIN REASON FOR...
