i have a johnson 115 thats geting hoter on one side of the motor all the plugs are sparking can somone shine some light on this mater thanks for reply im new with this out board thing
You probably have a thermostat on that bank that is stuck closed or a dislodged water deflector restricting waterflow.I recommend looking into the T/stats first.In addition,if the waterpump has not been serviced recently ,I would install a new one along with both new T/stat assys.