need help diagnosing an annoying issue

[fish_hntr]

On my kicker, a 1999 Evinrude 9.9 four stroke, it will not stay running for more than 10-15 minutes without squeezing the bulb as it starts to sputter and die. It started at higher altitude while fishing Electric lake 2 years ago and did it a few times at the gorge last year, plugs are new with fresh oil change last spring. Could it be a carb or fuel pump issue?
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