Two years ago my riding mower died when the engine blew a rod. I
finally found a new-used engine for it, and am installing it. The
only problem is that I never drained the gas in the tank. I just
pulled the hose off the carburetor and plugged the end of the hose.
I just pulled that bolt out of the hose because it's needed to mount
the engine, and thats when I smelled that strong odor that tells me
the gas is stale. (I've gotten to know that smell). The gas is ONLY
in the plastic tank and hose. I plan to replace the hose anyhow, but
the tank needs to be cleaned. My question is what is the best way to
clean it to be sure that no gum and varnish get into the carburetor?
Actually, it does not look like it is to that stage yet, but I dont
want to take chances. Is simply draining it and flushing some new gas
thru it enough, or should I wash it out with some sort of detergent
and water, or is there something else I should pour thru it, like carb
cleaner or laquer thinner or something? Anyone have any experience
with this? (There's probably only one cup of gas in there, but it
definately smells stale).
And while I am on this subject, if the whole thing (carburetor and
all) was full of stale gas, what is the best way to flush the whole
thing, or is a complete rebuild of the carb necessary? I may have
that problem on another machine, but have not yet looked. Is adding
that gas stabilizer of any use after the gas has already gone bad?
Thanks to all that help.