Re: Nissan 9.8 priming problem
My Tohatsu 4 hp did about the same thing. I had left it sitting over the summer in a hot garage.
I went to use the outboard and the same thing happened as the OP, as I pumped, gas came out somewhere on the carb.
In my case, it turned out to be a stuck float that fixed itself once the gas was in the carb for a while.
Same outing, the outboard would not idle and this turned out to be the idle jet completely varnished over.
I had run the outboard dry but aparently whatever gas was left in the carb closed off the jet and froze the float. Im now adding all sorts of junk to the gas (like seafoam) but not sure it does anything.