eReplacementParts.com
866-322-9842
Ryobi Parts
Repair Parts Home  Lawn Equipment Parts  Ryobi Parts  791-683974B Primer and Hose Assembly

Primer and Hose Assembly

Part Number: 791-683974B
RyobiTroy-BiltYard ManBolensMTDYard Machines
Availability: 25+ in stock
Price: $14.49
Quantity:
Order within the next 5 hours
and your part ships today!

*This part replaces obsolete part #: 791-181801, 791-181558 and 791-683974.

Product Information
Manufacturer: Ryobi, Troy-Bilt, Yard Man, Bolens, MTD, Yard Machines
Product Number: 791-683974B
Classification: Part
Weight: 0.01 lbs.
Also Known As: Purge Bulb, Carb Primer, Carburetor Primer, Fuel Primer, Primer Bubble
Shipping: Ships Worldwide
Description:
The primer hose is inserted into the fuel tank then connected to the Primer.
By pressing on the primmer a few times this assembly fills the carburetor with fuel.
When the carburetor has enough fuel in it, the excess fuel is forced back into the the tank through the fuel return line.

After time the primer hose will become brittle and crack and have to be replaced.
The primer will also lose its elasticity, and may also crack and not be able to suck up the fuel into the carburetor.
And will have to be replaced.

Compatibility

This part is compatible with the following machines:

Ryobi
410r (21A-121R034) Tiller
410r (21AK410G034) Tiller
410r (21BK410G034) Tiller
410r (21CK410G034) Tiller
410r (21DK410G034) Tiller
410r (21EK410G034) Tiller
410r (21FK410G034) Tiller
280r (41BR280C034) Handheld Blower
280r (41ER280G034) Handheld Blower
280r (41FR280G034) Handheld Blower
310BVr (41DS310G034) Handheld Blower/Vacuum
310BVr (41DS310G034) Handheld Blower/Vacuum
320BVR (41AS320G034) Handheld Blower/Vacuum
320BVR (41AS320G034) Handheld Blower/Vacuum
320BVR (41AS320G734) Handheld Blower/Vacuum
320BVR (41AS320G734) Handheld Blower/Vacuum
320BVR (41BS320G734) Handheld Blower/Vacuum
320BVR (41BS320G734) Handheld Blower/Vacuum
600r (41AN600G034) Handheld Trimmer
600r (41BN600G034) Handheld Trimmer
700r (41AD700G034) Handheld Trimmer
700r (41AD700G734) Handheld Trimmer
700r (41ADL01G034) Handheld Trimmer
700r (41ADL01G734) Handheld Trimmer
700r (41BD700G034) Handheld Trimmer
700r (41BDL01G034) Handheld Trimmer
700r (41CD700G034) Handheld Trimmer
700r (41DD700G034) Handheld Trimmer
700rVP (41AD7VPG034) Handheld Trimmer
700rVP (41AD7VPG734) Handheld Trimmer
700rVP (41CD7VPG034) Handheld Trimmer
704r (41AD704G034) Handheld Trimmer
704r (41AD7V4G734) Handheld Trimmer
704r (41BD704G034) Handheld Trimmer
704r (VP 41AD7V4G034) Handheld Trimmer
704rVP (41BD7V4G034) Handheld Trimmer
704rVP (41CD704G034) Handheld Trimmer
704rVP (41CD7V4G034) Handheld Trimmer
705r (41AD705G034) Handheld Trimmer
705r (41AD705G734) Handheld Trimmer
705r (41BD705G034) Handheld Trimmer
705r (41BD705G734) Handheld Trimmer
705r (41CD705G034) Handheld Trimmer
720r (41AD720A034) Handheld Trimmer
720r (41BD720A034) Handheld Trimmer
720r (DE 41AD72EC034) Handheld Edger
725r (41AD725A034) Handheld Trimmer
725r (41AD725A734) Handheld Trimmer
725r (41AD725B034) Handheld Trimmer
725r (41AD725C034) Handheld Trimmer
725r (41ADL04A034) Handheld Trimmer
725r (41ADL04A734) Handheld Trimmer
725r (41BD725A034) Handheld Trimmer
725r (41BD725A734) Handheld Trimmer
725r (41BD725B034) Handheld Trimmer
725r (41BD725C034) Handheld Trimmer
725r (41BDL04A034) Handheld Trimmer
725r (41CD725A034) Handheld Trimmer
725r (41CD725B034) Handheld Trimmer
725r (41CD725C034) Handheld Trimmer
725r (41DD725A034) Handheld Trimmer
725r (41ED725A034) Handheld Trimmer
725rE (41AD2REC034) Handheld Trimmer
725rE (41AD7CRC034) Handheld Trimmer
725rE (41BD2REC034) Handheld Trimmer
725rE (41BD7CRC034) Handheld Trimmer
725rE (41CD2REC034) Handheld Trimmer
725rE (41CD7CRC034) Handheld Trimmer
750r (41AD750A034) Handheld Trimmer
750r (41AD750E034) Handheld Trimmer
750r (41BD750A034) Handheld Trimmer
750r (41BD750E034) Handheld Trimmer
750r (41DD750F034) Handheld Trimmer
765r (41AD65CG034) Handheld Trimmer
765r (41AD765G034) Handheld Trimmer
765r (41AD765G734) Handheld Trimmer
765r (41ADL02G034) Handheld Trimmer
765r (41ADL02G734) Handheld Trimmer
765r (41BD765G034) Handheld Trimmer
765r (41BD765G734) Handheld Trimmer
765r (41BDL02G034) Handheld Trimmer
766r (41BD766G034) Handheld Trimmer
766r (41CD766G034) Handheld Trimmer
767r (41BD767G034) Handheld Trimmer
767r (41CD767G034) Handheld Trimmer
767rJ (41DD76JG034) Handheld Trimmer
767rJ (41ED76JG034) Handheld Trimmer
770rEB (41AD7EBC034) Handheld Trimmer
775r (41AD775A034) Handheld Trimmer
775r (41AD775A734) Handheld Trimmer
775r (41AD775B034) Handheld Trimmer
775r (41ADL05A034) Handheld Trimmer
775r (41ADL05A734) Handheld Trimmer
775r (41BD775A034) Handheld Trimmer
775r (41BD775A734) Handheld Trimmer
775r (41BD775B034) Handheld Trimmer
775r (41BDL05A034) Handheld Trimmer
775r (41CD775A034) Handheld Trimmer
775r (41CD775B034) Handheld Trimmer
775r (41DD775A034) Handheld Trimmer
775r (41ED775A034) Handheld Trimmer
775r (41FD775A034) Handheld Trimmer
780r (41BD780G034) Handheld Trimmer
780r (41ED780G034) Handheld Trimmer
780r (41FD780G034) Handheld Trimmer
790r (41AD790A734) Handheld Trimmer
790r (41BD790A034) Handheld Trimmer
790r (41DD790A034) Handheld Trimmer
790r (41ED790A034) Handheld Trimmer
790r (41FD790A034) Handheld Trimmer
RGBV3100 (41ASGBPG034) Handheld Blower/Vacuum
RGBV3100 (41ASGBPG034) Handheld Blower/Vacuum
RGBV3100 (41ASGBPG734) Handheld Blower/Vacuum
RGBV3100 (41ASGBPG734) Handheld Blower/Vacuum
RGBV3100 (41ASGBVG734) Handheld Blower/Vacuum
RGBV3100 (41ASGBVG734) Handheld Blower/Vacuum
RGBV3100 (41BSGBPG734) Handheld Blower/Vacuum
RGBV3100 (41BSGBPG734) Handheld Blower/Vacuum
RGBV3100 (41BSGBVG034) Handheld Blower/Vacuum
RGBV3100 (41BSGBVG034) Handheld Blower/Vacuum
RGBV3100 (41CSGBVG034) Handheld Blower/Vacuum
RGBV3100 (41CSGBVG034) Handheld Blower/Vacuum
RGBV3100 (41DSGBVG034) Handheld Blower/Vacuum
RGBV3100 (41DSGBVG034) Handheld Blower/Vacuum
RGBV3100 (41ESGBVG034) Handheld Blower/Vacuum
RGBV3100 (41ESGBVG034) Handheld Blower/Vacuum
740R 2-Cycle Gas Trimmer
Troy-Bilt

Products Compatibility

This item works with the following types of products:

  • • Blower
  • • Cultivator
  • • Edger
  • • Trimmer
  • • Vacuum
Questions & Answers

I replaced the return line and fuel line on my blower vacuum, it starts fine, but will not stay running, runs strong for about 5 or 6 seconds then stops.
E.J. HUNT for model number Ryobi RGBV3100/41DSGBVG034
Hello E.J, thank you for your question. We would recommend checking the Air filter, and cleaner assembly, spark plug, as well as the carburetor gaskets, primer and lines. I hope this helps!
How to change primer
J. McGloughlin for model number TB90BC
Hello, Here is a link on how to replace a primer bulb: https://www.ereplacementparts.com/repair-center/article/4262/How_to_Replace_a_Primer_Bulb.html
Will this part fit the specified Craftsman trimmer? If so, what are the other related fuel line parts for replacement?
Howard Voigt for model number 316.791860
Hello Howard, great question. The following parts are compatible with your model 316.791860. 791-683974B 753-05219 791-181086. Hope this helps.
how to replace hose pipe from prime bulb to fuel tank??
azad for model number TB320BV
Hi Azad, we actually have an instructional video on how to replace this on our page. You can watch the video through this link. https://youtu.be/i-KDDLoG0lo Thank you for your question and good luck with your repair!
Need fuel line diagram from tank to primer bulb and then to carburetor. Carb has one port on top left side and a second on bottom right.thank you
Steve for model number Tb70ss
Hi Steve, sadly we don't have the digram for the fuel line other than the diagram in the model its self, for example you can look at page b in this diagram. https://www.ereplacementparts.com/troybilt-tb20cs-41bdt20c711-trimmer-parts-c-26780_27267_27268.html We also have youtube video that may help you. https://youtu.be/i-KDDLoG0lo Thank you for your question and good luck with your repair!
Repair Instructions: Submitted by Customers Like You
38 of 46 people found this instruction helpful
Tool Type:
Cultivator
Parts Used:
Fuel Line and Filter - 791-682039
Primer and Hose Assembly - 791-683974B
Fuel Return Line - 791-181086
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Screwdriver
Fuel Leak
The fuel line and filter, primer and hose assembly, and the fuel return line had deteriorated over time and were leaking fuel. I found the parts here and ordered them. When the parts arrived, I removed four screws from the rear cover on the engine, pulled off the old hoses and put the new ones on. I screwed the rear cover in place and was done in about 30 minutes or less.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
28 of 32 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Primer and Hose Assembly - 791-683974B
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Pliers
Bulb disintegrated because of ethanol in gas. (Use premium gas in small motors )
The priming bulb has disintegrated in this trimmer. Unit came with one gas line, simple swap. Website had great tools to ID the part, match it to model of trimmer. Just mind what hose goes where. Note the replacement hose will need an angle cut to go into the gas tank easier.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
22 of 24 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Primer and Hose Assembly - 791-683974B
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
, Bristol tip screwdriver , sharp knife, needle nose pliers
The old primer bulb had cracked and the was a hole where the top of the bulb is normally plugged shut in the mfg mold. Couldn't prime the carburetor.
1,removed the muffler and air filter housing four mount screws with the screwdriver
2,removed the center fuel tube leads from carburetor to the primer bulb outer connecting tube (make sure the fuel tank is empty of any fuel)
3,remove only the tube leading from the outer primer bulb connection to the inner hole in the fuel tank.
4,unsnap the old primer bulb from the mount by squeezing the lock arms and pull the bulb assembly rearward.
Install the new tube to the longer outer connection port. Then cut a 45 degree angle on the loose end of the tube.
2,install the new primer bulb and tube into the mount bracket *you may have to squeeze the mount locks inward slightly bending them towards each other to get them in through the mount bracket hole. They fit tight.
3,put a drop of oil on the 45 degree end of the tube. Using needle nose pliers force the 45°end through the inner hole of the fuel tank. Look through the fuel cap opening of the tank to be sure all the 45°end is inside the tank.
Reinstall the muffler and air filter housing. Fuel up and go.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
6 of 6 people found this instruction helpful
Tool Type:
Cultivator
Parts Used:
Primer and Hose Assembly - 791-683974B
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Pliers, Nutdriver
Primer bulb split , unable to prime engine to start
Removed old primer bulb and hose and replace with new primer bulb and hose, started up just fine. Ryobi gas engine , with extensions.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
6 of 7 people found this instruction helpful
Tool Type:
Cultivator
Parts Used:
Primer and Hose Assembly - 791-683974B
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver, Pliers
Bad primer bulb
No instructions were included with the replacement part so I watched ereplacementparts video on youtube. This made repair really easy.

Did you find this story helpful?
Thanks for voting and helping fellow customers!
4 of 4 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Primer and Hose Assembly - 791-683974B
Fuel Return Line - 791-181086
Primer and Line Assembly - 791-181538
Fuel Line Assembly W/Filter - 791-181085
Repair Difficulty:
Medium
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Pliers
Trimmer hadn't been started in 8 yrs. Fuel lines and carburetor were deteriorated.
Removed carburetor and cleaned all internal parts. replaced all full lines, primer bulb and gas filter. Replaced spark plug. Started on 2nd pull and runs like a champ.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
4 of 5 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Primer and Hose Assembly - 791-683974B
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
, Needle nose pliers
The primer bulb fell apart on my machine
Since it was half apart the replacement was simple:
1. I used the pliers to pull the fuel lines off the bulb.
2. Squeezed the tabs in to release the bulb.
3. Inserted new bulb until it snapped in.
4. Slid fuel lines on.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
3 of 4 people found this instruction helpful
Tool Type:
Cultivator
Parts Used:
Fuel Line and Filter - 791-682039
Primer and Hose Assembly - 791-683974B
Fuel Return Line - 791-181086
Repair Difficulty:
Medium
Time Spent Repairing:
15-30 minutes
Tools Used:
Screwdriver, Pliers
Hoses were brittle and primer was cracked
Remove cover, loosen carburetor, pull up to get gas tank out, put new hoses in, ran from gas tank to carburetor. Needed 3 new hoses and primer, reconnected them, snapped new primer in place and put back together.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
1 of 1 people found this instruction helpful
Tool Type:
Cultivator
Parts Used:
Fuel Line and Filter - 791-682039
Primer and Hose Assembly - 791-683974B
Fuel Return Line - 791-181086
Repair Difficulty:
Easy
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Pliers, Socket set, Nutdriver
Fuel hoses were fell apart.
1. Removed cover over carburetor, four screws.
2. Removed carburetor, two screws.
3.Inserted hoses and primer. Used sockets and a nut driver to get filter and fuel line into tank. This was the innovative part if the installation.
4 .Reassembled carburetor and cover.
5. Gassed it up and it ran..
Did you find this story helpful?
Thanks for voting and helping fellow customers!
2 of 3 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Fuel Line and Filter - 791-682039
Primer and Hose Assembly - 791-683974B
Fuel Return Line - 791-181086
Repair Difficulty:
Medium
Time Spent Repairing:
15-30 minutes
Tools Used:
Pliers
Fuel lines were old, cracked, brittle and disconnected
Replaced each fuel line one at a time. Very easy except for the fuel tank line that had the filter already installed. Needed to go from inside the tank and then push it in place from the inside. An "L" shaped tool helped. Otherwise very easy and did not need to purchase a new trimmer.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Reviews
4
Average Rating (out of 5):
11 Reviews
Click to filter by ratings:
5 stars
6
4 stars
3
3 stars
0
2 stars
0
1 stars
2
  • Highest Rating
  • Most Recent
< PREV
  • 1
  • 2
NEXT >
  • Lawn Trimmer is back to work.
    Received in time and now I can trim my yard. Its a easy replacement. Ok time to start working.
    Guest - 12 days ago Verified Purchase
    Weed eater bulb replacement
    Fit like a charm. Works great. Thanks.
    Guest - 23 days ago Verified Purchase
    A Very Good Experience
    My very old weed eater needed a primer bulb. I was surprised to find one as easily as I did on your site and at the price offered. Thanks
    Guest - June 18, 2019 Verified Purchase
    Worked as a easy replacement
    Changed and worked
    Guest - May 24, 2019 Verified Purchase
    Easy replacement and back to work
    everything about this product work as stated. video for replacement was very helpful. great jobs people
    Guest - May 1, 2019 Verified Purchase
    Very well pleased
    Very easy to find product needed and very efficient and delivery was quick and would definitely use you again !!! Thanks!!!
    Guest - April 29, 2019 Verified Purchase
    Parts for trimmer repair.
    The parts worked well, ad my trimmer is working very well. However, it did take 11 days to arrive. I realize this is not your fault, as you did ship on the order date, but rather with the USPS. Your web site showed that my area is in the 4 day delivery area. Thought you'd like to know.
    Guest - 28 days ago Verified Purchase
    simple repair
    perfect fit - shipping took a while
    Guest - May 14, 2019 Verified Purchase
    Easy, works great
    Arrived when expected, weed-wacker runs well again
    Guest - April 23, 2019 Verified Purchase
    Disappointed
    The primer bulb worked great. I was very disappointed in the fuel line kit that came with it. The 3 inches of fuel line did not come close to replacing all the fuel lines that this "weed eater" needed.
    Guest - July 12, 2019 Verified Purchase
    Verified Purchase
    eReplacementParts Team
    • Highest Rating
    • Most Recent
    < PREV
    • 1
    • 2
    NEXT >
    Product Information
    Manufacturer: Ryobi, Troy-Bilt, Yard Man, Bolens, MTD, Yard Machines
    Product Number: 791-683974B
    Classification: Part
    Weight: 0.01 lbs.
    Also Known As: Purge Bulb, Carb Primer, Carburetor Primer, Fuel Primer, Primer Bubble
    Shipping: Ships Worldwide
    Repair Guides
    Watch the Repair Video for Primer and Hose Assembly
    How to Replace the Primer and Hose Assembly on a Ryobi Trimmer
    Articles:
    How to Replace a Primer Bulb
    Replacing primer bulbs in small engines is one of the most common types of tool repairs, and this article explains profe...
    June 25, 2010
    How to Replace the Primer and Hose Assembly on a Ryobi Trimmer
    Primer past its prime? Remove and install the primer and hose assembly on your Ryobi string trimmer. Simple instructions...
    September 08, 2015
    Related Products
    eReplacementParts.com
    7036 South High Tech Dr.
    Midvale, UT 84047
    visa mastercard discover american express PayPal

    fancyboxy