Carb Overhaul, Pointless?

[mr_andyj]

Onan has been sitting for years unloved.

Is it pointless to try to clean the carb? I got it to start and run for a few seconds. Now the carb is flooding and pouring gas out the intake. Great spark, but no bang now.
And whats that hissing sound?

Carbs are cheap on ebay, but I have to wait.

I removed and cleaned the carb. It looks fine, great for having sat so long, but did have some varnish.

Here is pics that include model #. 2004 year

[midnightsadie]

all that gunk is clear back to the source, needs clean replaced.

[wa8yxm]

Sounds like a fuel logged float or a dirty needle valve

Yes a clean should help... Might need to purge fuel and replace pump .