Genny repair

I am using my giant Honda because my champ isn't working well right now. It runs at full strength for few minutes then grunts really hard and lights dim for a minute, then shuts off. It can't possibly be water in fuel as I always run premium and mix water eaters in my fuel. Been running this gent for 3 years. Last duck season I ran it 12 hours a day for almost 40 days. Plus lots bowfish hours. I'm thinking its just giving up. Can these be repaired or should I just look at a new one. I've got my $300 buck out of it





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