On Sunday, February 28, 2021 at 9:59:29 AM UTC-5, dan wrote:
On Sat, 27 Feb 2021 08:42:20 -0600, Snag wrote:


The hoses are a tight slip fit in the holes in the tank .
OK. Good. That's what I was hoping. The larger yellow hose coming out the
top of the carb is pulled out cleanly so am I to conclude it's the return?

That it pulled out cleanly doesn't mean anything. If it pulled out with several
inches or more, then that one would be the pickup. But the pickup can break
right at the tank, so it will can come right out cleanly, so that isn't an indicator.


The supply
line will usually have a filter on the inside end .
The smaller greenish blue is the one that broke at the tank edge so it's
currently blocking the hole (I can probably pick it out though).

Am I to assume that's the input fuel line to the carb?
I install them by
cutting the end of the hose at a long taper to get it started in the
hole , pull it in as far as needed with long nose pliers or a hemostat
then cut it off square and install the filter.
I hadn't thought of the filter. It must be still inside the tank.
The return hose needs
only to come inside the tank , supply needs to be long enough to reach
the bottom of the tank - unless you only want to use the top half ...
What I think I'll do is poke out the greenish blue hose from its hole in the
gas tank and see if I can shake out the filter to reuse it (I didn't think
of buying a spare).

There's a black connector a couple of inches away from the carb which I
assume is a one way valve (but I'm not really sure what it is as it doesn't
show up in the tank picture on the Troy-Bilt web site).

Just look at the old hoses. The one with the filter is the pickup line.
I recall some black thing on my Troybilt weed whacker/edger. I think
it really is just a hose connector. No need for a check valve that I'm
aware of. But why they needed that connector, IDK