I have a 50horse mariner last year the motor would start ever time when I went to put it in to drive it would stall out I change the coils plugs and wires it stopped for a few. Days then started again I was told it might be the control box so I just changed that out this week I fired it up ran ok went back today to work on it and now it will not stay running I have new gas and oil and put some sea foam in the gas to rule out bad gas if I spray some crab cleaner in it it will run then cut out any ideas?????
