Question about Ryobi Garden
How should the fuel lines be routed on a Singer model gbv28 made by Ryobi? The carb has a brass nipple on the front by the diaphragm and a plastic one on the back they are the same height. I have the lies routed as follows: from the bottom of the tank filter to the short nipple of the primer bulb, then from the center long nipple of the primer to the rear plastic nipple of the carb, then from the brass nipple of the carb to the side of the tank. When replacing the primer bulb the lines crumbled and I can not find how they should be routed I talked to 3 different repair shops and got 3 different answers. The carb was rebuilt, it will start run a few seconds and then dies. The adjustment screws were set by the book and then by a technician but it still does not run. Can you tell me the correct routing of the fuel lines? Your help would greatly appreciated, thank you.
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Posted on Jan 02, 2017
The order of fuel travel should be:
Fuel filter to fuel hose to Carb's Fuel Supply nipple. (On the main body of the carb)
Primer Plate Nipple on carb to fuel hose to Suction Nipple on Primer Bulb. (It must pull fuel thru the carb, not push)
Pressure Nipple on Primer Bulb to fuel hose to Fuel Tank Return hose.
When correctly installed, the fuel will be PRESSED into the fuel tank via the return hose when primer is pressed in . . . and SUCTIONED out of the tank and into the Carburetor when primer in released.
Hope this helps,
Posted on Oct 16, 2009
Testimonial: "Very clear explanation. Thanks!"
The fuel fillter line goes directly to the carb.inlet first
the outlet on carb.
goes to suction side of primer and outlet side of primer back to tank
primer draws fuel through carb. to prime
Posted on May 09, 2010
Testimonial: "Thank you"
The small diameter line out of fuel tank (has filter in-tank on end) connects directly to the side of the carburetor that has the fuel pump....that is the cover without the hole in it. Other larger diameter fuel line out of tank connects to the longer nipple on the external purge/primer bulb. The bulb "pulls" fresh fuel from the fuel tank to the carb and then out of the carb to itself, where it then "pushes" any air/old fuel back into the fuel tank. The remaining larger diameter fuel line in this setup goes from the metering chamber (has cover with writing on it and a vent-hole) side of the carburetor to the smaller nipple on the purge/primer bulb. Again, on the primer bulb, the longer nipple has a line going directly from it to the tank. This is the return line. The shorter nipple on the bub has a line from it going to the metering chamber side of the carb. If the purge/primer bulb is on top of the carb...small line from carb body to small hole in tank with filter. Larger diameter line goes from the bulb on the fuel pump side of the carb to the larger hole in the fuel tank where sometimes the line is held in place with a nylon nipple connector that keeps the line from pulling out of the tank. Otherwise, the line should enter the tank for about 1/2" or so
Posted on Feb 19, 2011
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