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In 1969 Evinrude/Johnson started making the 4hp instead of 3hp. Both appear to have same displacement, bore, and stroke. What changes were made to improve power approx 33%? Larger carb?
Bought a JW10 that was seized up. Previous owner didn't know anything. Supposedly an old lady gave him the motor; this should mean it was seized from improper storage. I managed to pound one cylinder down so both cylinders were even and ports were closed. For several days I poured Seafoam in...
I've got a 3012 for a project fixer. It wasn't running after sitting for a long while before I bought it. Rebuilt carb then replaced coils and points. Now it's running but it gets really stinkin hot. I can see some water spraying out the exhaust port and it looks like most of my other...
