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Changing out fuel lines on Ryobi Trimmer, now when primer bulb is pressed, it won't pop back out, what's wrong

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The carb is plugged or the primer valve is sticky with gas varnish/gum

Posted on May 04, 2010

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Posted on Jan 02, 2017

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The primer bulb is broken on my 700r 2-Cycle Gas Trimmer and I would like to replace it


not difficult at all to do , first obtain Ryobi primer /fuel line kit from your local distributor , then remove air cleaner cover (pops off with fingers) then drain all gas from fuel tank back into storage tank , locate the two Phillips head screws next to primer bulb and remove them , careful not to drop them !! remove old bulb from ring and replace with new bulb from pkg. then using a clean cloth , carefully wipe out sealing grove where bulb seats down (I guarantee its dirty) when all clean , place bulb down in grove and make sure it seats well then secure with ring and replace screws (don't over tighten) you might as well replace the fuel lines as they come in kit , instructions are on pkg , I do suggest doing one at a time to not forget how they go , and do use the new fuel filter that's inside pkg too

May 13, 2016 | Ryobi Garden

2 Answers

Won't start , can not get primer to work even after replacing primer bulb.


If your fuel filter is clean, and none of the fuel lines are pinched, then you probably need to replace the diaphragms, gaskets, and screen in the carb. Some carbs with the primer bulbs mounted on the carb have a check valve in the primer system. This is the least likely problem, but it is possible that the check valve is defective.

May 07, 2011 | Ryobi 30cc 17" String Trimmer Zrry30530...

1 Answer

I have a 26cc ryobi weed trimmer--primer bulb will not draw fuel, but will draw fuel when I loosen the 2 screws that hold down the bulb


Possible issues:
1. Primer bulb or bottom assembly has crack or hole in it (needs replacing). See ebay for about $6.00
2. Fuel lines are not sealing to the primer nipples properly (cut line and re-attach if you have sufficient line available) otherwise; replace.
3. You may be somehow kinking the fuel lines when you clip it back in place due to fuel lines too short
My bet: #1 or #2. Good luck!

Sep 17, 2010 | Ryobi 30 Cubic Centimeter Curved Shaft Gas...

1 Answer

I have a Ryobi 700r trimmer - I needs a diagram of all the fuel line hookups


<div id="ms__id6" class="solution-text"><span id="ctl00_ctl00_MainColumn_CenterColumn_ThreadSolutions1_Repeater1_ctl00_lblSolution">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.<br />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.</span> </div><!-- from fixya rte -->

Aug 09, 2010 | Ryobi 30 Cubic Centimeter Curved Shaft Gas...

2 Answers

I need to know how the fuel lines are hooked up in my ryobi gas trimmer. All of the fuel lines rotted out. I took them out and I need to know the correct connection sequences (what goes where).


line runs from little filter in tank to carb.
line from carb. to primer bulb
line from primre bulb back to gas tank.
lines are 2 sizes
need to cut at angle end of lines in tank so you can get them thru holes
and grab with needle nose plyers and pull them thru.
make sure you put the little filter on end before you pull line thru and leave
enough so filter can move around the whole tank.
second line in tank is smaller and need to cut and pull it thru hole in tank to primer bulb

Jun 23, 2010 | Ryobi 30 Cubic Centimeter Curved Shaft Gas...

1 Answer

Ryobi Gas trimmer fuel line routing


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

May 09, 2010 | Ryobi 30 Cubic Centimeter Curved Shaft Gas...

1 Answer

Fuel line positions ?


The longest fuel line, which has the filter attached to it, goes to the brass fitting furthest from the primer bulb. The short fuel line goes directly under the primer bulb. Which hole to put it in doesn't matter if the lines are the same size. Just choose the shortest path for each. However, if the lines are different sizes, then the longest line (smallest in diameter), goes in the smallest hole of the tank.

Jim

May 25, 2009 | Ryobi 15" Electric Factory Reconditioned...

4 Answers

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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