I recently picked up a 1989 2.2 Mercury outboard that hadn't run in years. After draining the old gas and cleaning the carburetor the motor will start but only with a shot of starting fluid in the spark plug hole and the gas petcock off. (also, the throttle is in the full open position with the choke open as well) I have a good spark however the compression is only around 55-60 psi, could this be my problem?