It's been a while!
I had my Mariner Marathon 25hp 2-stroke serviced about 6 weeks ago. It's been out several times since then, the last time on Monday, with no issues.
Today (Sunday), I returned home from my hols with the boat and attempted to flush the engine. It will run only for about 2-3 seconds then cuts out. If I crank the revs, it will keep going, but seems to be backfiring every couple of seconds.
Any ideas? I can't imagine it being old/contaminated fuel as it's so recent since it was used.
A RIB is for life, not just for Christmas.