I recently brought a 1993 Mariner 4/5hp and am having problems starting it from it's internal tank. It starts straight away from an external tank, and I'm guessing it's been used with this for many years.


I've open the flow from the internal tank, there's no blockage from tank to cut off switch.


After about 10 pulls with full choke the motor starts very smokely and then dies regardless of how much throttle I give it or when I put the choke in.


Any ideas?