I have a 1965 6hp seaking motor that i cant get started. This motor has plenty of spark but will not run . I even tried taking the plugs out and giving it a shot of eather straight into the cyclinders then replacing the plugs . I cant even as much as get a hit out of it. It has between 55lbs. and 60lbs. of compression, I was told it would not start with less than 90lbs. of compression. Is this true, and if not do I need to over haul this motor. If anyone has any suggestions to get me and my son back to fishing on the waters it would be greatly appericatied.