When I started my generator for the first time this season, the genny
started fine and ran great for the first 3-4 mins before it started to
run rough and shut itself down.
After letting it sit for a min or so, I started it again and it ran
for 30-40 seconds before running rough and shutting down. My genny
only has 21 hrs on it right now, and I'm starting the think that the
carb may be gummed up (if that's possible). There is lots of water
coming out of the exhaust port.

To help figure this out, this is what I did tonight. I checked the
oil and it's at the full mark.

I pulled the screen filter for the seacock off and cleaned it out,
but it wasn't that dirty. I didn't check the coolant in the engine and
it's full but the overflow is well below the add mark.

I pulled the entire fuel filter housing off and emptied it out. The
filter didn't appear dirty, but with the fuel bowl still on I blow
it through with very little effort. So the filter appeared fine.

Before reconnecting the fuel lines to the filter housing I blow the
main fuel line back to the tank with my mouth and it wasn't clogged
at all (I did suck at one point and got a mouth full) :-)

I reinstalled everything and started the genny and it ran the same.
So I pulled the out line off of the filter and start the genny, it
started good and ran for the same period before shutting down. Did
the same think a few more times until it wouldn't start anymore (out
of fuel). I then reconnected the fuel line and it started but shut
down again, but when it shuts down it gets rough before finally
stopping.

I also checked the electric choke, and it appeared to work fine when I
started it. After all this I did start the genny again and it ran great
for a few mins and then start to run rough and spurt and finally shut
itself down. I'm now at a loss, and I'm starting the think that it may
be one of the sensors for the high exhaust temp or high water temp
safety shutdown switches.

I hope this information helps someone in helping me solve this problem,
if you have any questions please let me know.

Thanks