Question about Ryobi 15" Electric Factory Reconditioned Trimmer (ZRRY41002) - Factory Reconditioned

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Ryobi 31cc fuel line diagram

Need ryobi 31cc fuel line diagram

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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rycgl
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SOURCE: replacing fuel lines on ryobi weed eater,need

This is an ongoing issue for users, and rightfully so. Small diameter line out of fuel tank (has filter in-tank on end) connects 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. Years ago on 2-stroke trimmers, primers were not even used,...you choked the carb with a slide lever and gravity let fuel enter the carb from above...a few pulls, a "pop"...slide it off of choke and away you went.
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 the line is held in place with a nylon nipple connector that keeps the line from pulling out of the tank.

Posted on Jul 10, 2010

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SOURCE: RYOBI 725R FUEL LINE DIAGRAM

I just rebuilt my 725r. I don't have a diagram but I can explain it. There are two lines coming out of the fuel tank. The line closest to the rear is the fuel feed and has the in-tank filter (these are available for replacement). This line goes through the lower case hole of the air filter housing and attaches to the bottom of the carburetor. The line toward the front of the tank attaches to the longer/lower fitting the primer bulb and is the return. The line coming off the shorter/upper fitting of the primer bulb goes through the upper hole of the air filter housing and attaches to the top of the carburetor.

FYI also, the forward carburetor screw is the low idle adjustment & the rear, the high-speed mixture. The original oil mixture spec called for 32:1

Posted on Jun 27, 2009

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I need a diagram for the fuel lines on a ryobi 31cc trimmer plus 15" from the fuel tank thru the primmer bulb to the carb for both lines


Don't quite understand your dilemma... there are only two fuel lines which go from the tank to the carburetor.....if looking at the engine from the back, the fuel line on the left is the intake line and the one on the right is the fuel return line....on the back of the carb are two fuel line brass inserts...they are inlet on left and return on the right....hope this helps ;-D

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I have a ryoby 31cc weed eater I need a diagrm on the corect posision of fuel lines


Typical fuel line routing2.gif is:

One line (the one with the fuel filter in the end of it) comes out of the fuel tank2.gif and goes to the bottom fitting on the carburator. The second line comes out of the tank and goes to the bottom fitting on the primer bulb. The third section of line goes from the top fitting on primer bulb to top fitting on the carburator. Hope this helped and best wishes.

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Typical fuel line routing is:

One line (the one with the fuel filter in the end of it) comes out of the fuel tank2.gif and goes to the bottom fitting on the carburator. The second line comes out of the tank and goes to the bottom fitting on the primer bulb. The third section of line goes from the top fitting on primer bulb to top fitting on the carburator. Hope this helped and best wishes.

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I need a fuel line and a primer fuel pump (plastic bubble) for my Ryobi 31cc trimmer plus. Any idea where I can get the parts?


You can order them directly through Ryobi and pay a small fortune or you can go to any small engine repair shop and purchase the fuel line by the foot. I believe your primer bulb can easily be replaced with what your local shop will have in stock. The parts from your local shop will probably out last the factory parts anyway.

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I have a Ryobi 31cc 17inch cut with gas line problems and this answered my questions. Thank You
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Ryobi 725r 31cc


Ryobi is Japanese for "Piece of ****" My suggestion is to throw it out!
My 767r has had fuel line and carb trouble from day one. I'll never buy another Ryobi or Craftsman tool again.

Jun 13, 2008 | Ryobi 15" Electric Factory Reconditioned...

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