What symptoms would a blown head gasket show. Engine will run for a second and die. Have checked and rebuilt carb, fuel pump, replaced hoses, etc. I have spark. Was running great then died. Wouldnt restart, then suddenly did. Ran a minute or so then died. Ever since just runs a short period (few seconds at most) then dies. I looked in the spark plug hole on the starboard side and the pistons appear wet. The port side doesnt appear the same. Any help would be appreciated.