Re: 1965 45 chrysler outboard Compression
Welcome Aboard!
Compression is when the piston compresses the air fuel mixture in the combustion chamber prior to the spark plug firing. You need a compression gauge (you can get one at your local auto parts store) Remove your spark plugs,attach gauge, spin over engine and it will read the amount of compression in the cylinder. Record your results for each cyld. Should be around 115-125lbs per cyld and near equal to each other.
What is the serial and mod # of your motor?