Replaced fuel lines and forgot how to connect lines to primer button and which line goes to carbeurator. Can you please help and show a picture of how the lines are to be installed

Hi,
The machine is a rebranded Ryobi. Probably need the model number they machines with the tank on either top or bottom. They also had 2 an 4 stroke engines.
As a general rule the primer pulls the fuel from the tank, through the carb and redeposits in the tank. Primers have one way valves turned in opposite directions, so if you use your finger on each of the nipples to check flow when you depress the bulb, it will distinguish them. One will hold a vacuum and will generally hook to the top of the carb.
Peace,
Clarke

Thanks Clarke,

It is a Troy Bilt TB90BC 2 cycle weedeater. Fuel tank is on top

I have the same model Troy-Bilt weedwacker and have the same issue.

If anyone has a good and fast answer I would appreciate it.

If not, I'll post the answer once I get it corrected.

Troy bilt TB25ET - Fuel line comes out of fuel tank routes through bracket to fuel inlet on the carb right side, Line comes back out of Carb on top back through bracket to backside of primer bulb and if nipples are 2 sizes connect to shorter one or push on bulb and hold fingers over nipples one has vacuum other will push, connect to what should be shorter one with vacuum, Line then comes off long nipple of primer back into fuel tank ensure to push in about 1 to 1 1//2" -- Basically if you think or picture it -- It completes a full circle (Tank to Carb to Primer back to Tank) -- Hope this helps, Myself I could not find a diagram anyplace either just engine breakdown/blowups which are not very explicit on location fuel lines