fuel line for Ryobi 725R

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  #1  
Old 07-04-10, 02:10 PM
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fuel line for Ryobi 725R

The fuel lines for my Ryobi 725R are rotten. I've replace all but the line from the fuel tank (with filter) to the carburetor. When I removed this line, the filter fell back into the tank. I have recovered the filter and attachment parts. Any suggestions on how to reinstall this line? Access to the hole in the tank is extremely limited.
 
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  #2  
Old 07-04-10, 02:25 PM
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You can get creative with a small wire making a teeny hook on the end that you can draw the line up thru the hole from the inside of the tank, making a point on the line first. etc. etc.
lubricate the outside of the line,etc.
hth
 
  #3  
Old 07-04-10, 03:03 PM
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I don't quite understand how the wire would work. I've got a plastic fitting that has the filter on one end-inside the tank and a barbed end with white grommet outside the tank that the fuel line attaches to.

1. How to get the fitting lined up with the hole from the inside of the tank? Then how to hold in place while the fuel line is attached?

2. Alternatively, how to get the fitting with the fuel line attached line though the hole in the tank from the inside to the outside? I guess that if my section of fuel line was long enough, I could thread it through from the outside and attach the filter/fitting. But then could I pull that whole assembly though the hole and slide on the white grommet to hold in place?
 
  #4  
Old 07-04-10, 05:18 PM
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The grommet and fitting is such a PITA, I replace that with next size up fuel line, which seals the hole, and run it long enuf so filter is laying flat on the other side of the tank, use a small hooked wire to pull that line thru.
hth
 
  #5  
Old 07-05-10, 09:24 AM
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Glen, I appreciate your reply. However, I would like to put the filter back the way it was, if possible, so that I get full use of my tank.

Any one else have other thoughts?
 

Last edited by wolverine69; 07-05-10 at 10:54 AM.
  #6  
Old 07-05-10, 03:32 PM
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Problem solved

I wound up threading the fuel line up from the bottom and out the top of the gas tank. I then attached the fuel filter with the fitting and applied a little vaseline at the base before pulling the assembly back though the hole and attaching the grommet. Time to have some fun!!
 
  #7  
Old 07-06-10, 03:55 PM
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Well...still having problems

The engine starts, but dies under load. Everything seemed to be working fine when I last used the trimmer 3 years ago (serious medical problem kept me from doing my own yard work for a couple of years). I have not made any carburetor adjustments--just replaced the lines from the tank to the primer bulb and from the tank to the carburetor. I did not replace the line from the primer bulb to the carburetor as it did not appear damaged and I ran out of line. I do intend to replace that line as well as soon as I get some more.

Anyone have any thoughts?
 
  #8  
Old 07-08-10, 09:47 PM
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This is how you fix that fuel line.

Hi my name is Clint and I do this all the time, but it is hard to say in words so I thought you would like to see it being done. This man Donyboy is one of the best I've seen at filming the the things he does. I hope this helps. YouTube - donyboy73's Channel
 
  #9  
Old 07-09-10, 04:44 AM
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Great group of videos !! To hellp install the filter I made a tool that looks like a drum brake adjuster. I push on the filter from inside the tank to get the line through the tank.
 
  #10  
Old 07-10-10, 06:39 AM
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How I did it

Since I was reusing the filter (I didn't have another and it seemed to be fine), I threaded the fuel line from the bottom, attached the filter, applied a little petroleum jelly to the line directly under the filter, and pulled it bck through. My son has longer fingers than I do and he pushed on the filter from the top. I had been concerned about pulling on the line because I thought I might pull it off the filter connector, but I guess I would have been no worse off. In reality the line held very well. Now to figure out the carburetor problem...

Thanks to all who offered suggestions. Clint, that video link is great! Where were you when I was agonizing over this a week ago?
 
  #11  
Old 11-11-12, 10:09 AM
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Ryobi 725rE 2-cycle gas trimmer/edger maintenance

Thanks Clint! The donyboy73 YouTube video is brilliant! Clear, concise and to the point -- No trouble at all in following the steps.

For $25.18 I replaced all the lines, the fuel filter and the primer bulb.

Got the parts direct from MTD.

Parts list:
791-683974B assembly, primer bulb/h
791-181086 line, fuel return
791-682039 assembly, fuel line assembly
 
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