I have a ryobi 790r weedeater and i need the gas tank off . How do I do this?

On internet go to www.manuals.ryobitools.com and search for 790r. Next scroll down the page looking for the trilingual manual. Download the PDF version and you will have it quickly.

In this tab, click video on the right side of the screen,shows part numbers for that weedeater also:


http://www.ereplacementparts.com/ryobi-ry30530-string-trimmer-and-brushcutter-parts-c-7931_15633_15687.html

This was extremely hard to find, I had to scan it for you and put it on my personal server here for you. Please rate my answer here 4 thumbs up, it means a great deal to me if you would do so. I would be forever grateful. Here is the manual:

http://micromatikal.dlinkddns.com:8000/cust/790r.PDF

Here is a page that will take you to a download of the exploded view of the trimmer ..
http://safemanuals.com/user-guide-instructions-owner-manual/RYOBI/790R-SERIALS-810046371-THRU

on the right side there is a place to select the download .

The primer bulb sucks fuel from the tank to the carb. When the carb has enough fuel the remainder is sent back to the tank. When you replaced the fuel line did you use the exact length of line and did you re-install the filter. On some of the trimmers the filter is weighted and holds the line in the fuel. Good luck...Lee

Hi,
You can't clean the filter. You can however order a new filter with the filter attached from www.ryobi.com.
When you say it's not getting enough gas is the weedeater shutting off on you? If so your carb may need to be clean. If that's the case then report back and I can tell you how to do that.
Good luck!
Mike

The window ratio should be fine between 40/1 to 50/1.

Reduce oil ratio by increase gas part if some unburned oil can visible from the exhaust.

Someone else could have a better voice on this matter..

Maybe a quick fix and maybe not
check your muffler the factory puts a spark arrestor screen that tends to plug after awhile
there is a little plate on the side muffler that needs to be removed to access the screen you may need a torx bit or allen wrench to remove
you may have to remove the back half of the plastic cover to access the screws
remove screen and clean with carb. cleaner or equivalent make sure you can see through it and reverse the procedure to put it back

I can think of three possible causes that would be a good place to start looking:
- clogged tank ventilation, causing vacuum in the tank during use (check for this when opening the gas tank cap, you should hear a "suction sound" and the engine should prime and start afterwards)
- clogged fuel filter
- fuel filter/ fuel hose is not moving freely inside the gas tank causing it to **** air in some operating positions.

Good luck!