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Spark Plug

Spark Plug

Part Number: 791-610311B
RyobiTroy-BiltBolensYard ManMTDYard MachinesCub CadetHusky
Availability: 25+ in stock
Price: $10.29
Ships within 1 business day

*This part replaces obsolete part #: MC-322208-00, 791-147095, 794-00016, 753-04579 and 791-610311.

Product Information
Manufacturer: Ryobi, Troy-Bilt, Bolens, Yard Man, MTD, Yard Machines, Cub Cadet, Husky
Product Number: 791-610311B
Classification: Part
Weight: 0.01 lbs.
Shipping: Ships Worldwide
Description:
Genuine OEM replacement part, this item is sold individually.
A spark plug is used to deliver electric current from an ignition system to an internal combustion engine.

After time spark plugs will become dirty or fouled.
It is a good idea to replace the spark plug once this happens.
You should gap your spark plug according to the owners manual of the outdoor product you have.

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 (41CR280G034) Handheld Blower
280r (41DR280G034) Handheld Blower
280r (41ER280G034) Handheld Blower
280r (41FR280G034) Handheld Blower
290r (41AR290G734) Handheld Blower
310BVr (41BS310G034) Handheld Blower/Vacuum
310BVr (41BS310G034) Handheld Blower/Vacuum
310BVr (41CS310G034) Handheld Blower/Vacuum
310BVr (41CS310G034) Handheld Blower/Vacuum
310BVr (41DS310G034) Handheld Blower/Vacuum
310BVr (41DS310G034) Handheld Blower/Vacuum
310BVr (41ES310G034) Handheld Blower/Vacuum
310BVr (41ES310G034) 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
340BV (41BS340G034) Handheld Blower/Vacuum
340BV (41BS340G034) Handheld Blower/Vacuum
340BV (41CS340G034) Handheld Blower/Vacuum
340BV (41CS340G034) Handheld Blower/Vacuum
340BV (41DS340G034) Handheld Blower/Vacuum
340BV (41DS340G034) 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 (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 (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
Expand the 150+ compatible machines
Products Compatibility

This item works with the following types of products:

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

No questions have been asked yet
Repair Instructions: Submitted by Customers Like You
7 of 7 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Air Cleaner Filter - 791-180350B
Fuel Line and Filter - 791-682039
Spark Plug - 791-610311B
Automatic Line Feed Assembly - 791-182840
Repair Difficulty:
Medium
Time Spent Repairing:
15-30 minutes
Tools Used:
Screwdriver, Pliers, Socket set, Wrench Set, drill bit
Fuel line was cracked and leaking, and general tuneup needed.
I replaced the fuel line/filter first. Removing the old filter was a chore because of the tight fit of the barbs on the filter. Pushing it out with the pliers, little by little, worked well. The new fuel line/filter did not fit well into the hole, so i used a drill bit of the same size as the hole & carefully reamed out the inside of the hole by hand (the plastic fuel tank) so i could get it started through the hole. Tight working space. I used a flat screwdriver to push the filter down into place - inserted through the fuel tank opening - as well as gently pulling on the line & took some work to get it fully seated.
Replacing the air cleaner filter and spark plug were simple and quick. There were 4 torx head screws to remove the cover. The screws also have a slot for a straight-blade screwdriver, but it was worth it to get the Torx set.
Replacing the auto feed line assembly was straightforward, except there is a somewhat hidden setscrew on the inside of the shaft that must be removed. No replacement instructions came with the assembly, so I struggled with removing the old one before finding the setscrew. Once I removed it, the assembly removal and replacement was quick and easy.
The trimmer starts, runs, and doesn't leak.
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3 of 3 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Air Cleaner Filter - 791-180350B
Fuel Line and Filter - 791-682039
Spark Plug - 791-610311B
Repair Difficulty:
Medium
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Socket set, Wrench Set
Replace fuel filter in tank, replace plug and install new air filter.
Removed fuel tank and cleaned all areas of the trimmer. Installed new fuel filter and gas line. Installed new spark plug and air filter.
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3 of 3 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Spark Plug - 791-610311B
Fuel Tank Assembly - 308123004
Primer Bulb OD: 5/8" - UP04802
Repair Difficulty:
Medium
Time Spent Repairing:
15-30 minutes
Tools Used:
Screwdriver
Timmer is just old, hasn't been used for a few yeards, needed a tune up
Replaced the spark plug, leaky gas tank with hoses, and primer bulb and it worked great!
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1 of 1 people found this instruction helpful
Tool Type:
Trimmer
Parts Used:
Spark Plug - 791-610311B
Primer and Hose Assembly - 791-683974B
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Pliers, Socket set
The fuel bulb had broken open and was spilling gas.
Pull the cover, pushed the tab in and pushed the old bulb out. Detached the fuel lines. Pushed the new bulb in and attached fuel lines. Squeezed the bulb and couple of times and the weed whacker started right up.
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1 of 1 people found this instruction helpful
Tool Type:
Cultivator
Parts Used:
Fuel Line and Filter - 791-682039
Spark Plug - 791-610311B
Primer and Hose Assembly - 791-683974B
Fuel Return Line - 791-181086
Repair Difficulty:
Medium
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Pliers
Fuel lines deteriorated.
Removed the old lines and replaced with the new ones.
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Tool Type:
Trimmer
Parts Used:
Air Cleaner Filter - 791-180350B
Spark Plug - 791-610311B
Carburetor Assembly - 753-04408
Recoil Pulley Assembly - 753-04823
Reel - 753-04284
Repair Difficulty:
Medium
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Pliers, Socket set, Wrench Set
Starter rope wouldn't recoil and the other was the engine was running ruff and stalls and only running on choke.
Replace the whole start system and replace the whole carburator part's and for good measure I have replaced the reel and the job wet well and the trimmer is running like new condition.
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Tool Type:
Edger
Parts Used:
Spark Plug - 791-610311B
Upper Drive Shaft and Housing Assembly (Shaft is 25-1/8 - 753-04344
Repair Difficulty:
Medium
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Power Drill, Socket set
Shaft coupler worn out
Remove old upper shaft from housing - keep track of which screws go where
Insert new upper shaft
Align the screw holes properly and insert all screws.
Done.
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Tool Type:
Trimmer
Parts Used:
Carburetor Gasket - 791-610675
Fuel Line and Filter - 791-682039
Spark Plug - 791-610311B
Primer and Hose Assembly - 791-683974B
Fuel Return Line - 791-181086
Repair Difficulty:
Easy
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Pliers
I had a Ryobi weed trimmer that i took to two shops for a tune and replace old fuel lines...both shops recommended i buy a new one as the cost of repairing the item was going to likely run $90-$120 and it was pointed out to me that i could buy a new one for $120...after figuring what parts i needed it cost under $50 and my time (1 hour).

Watched a YouTube video on replacing fuel lines and general tune up...looked up my brand/model on ereplacementParts.com and they had all the parts listed for any repair i might have...i selected the parts mentioned in the video and paid for them in the easy check out... they were delivered within a couple days...I watched the video again and re-assembled my parts and the trimmer started right up...the next day i was trimming about an acre of weeds n grass..

This was my first time using ereplacementParts.com. For me everything went great..i highly recommend them to anyone trying to repair your own equipment...
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Tool Type:
Trimmer
Parts Used:
Carburetor Gasket - 791-610675
Crankcase Cover Gasket - 753-1208
Spark Plug - 791-610311B
Repair Difficulty:
Medium
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Pliers, Socket set, Wrench Set, torx
All gas lines had gotten hard and broken
Removed choke cover.
Removed carburetor and and all dried and cracked gas lines.
Installed new fuel lines per online guide.
Replaced fuel filter, air filter and spark plug.
Pulled the starter cord until my arm fell off.....well, not that long but many times until it started. It had not been used for over 5 years.
Works GREAT!
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1 of 2 people found this instruction helpful
Tool Type:
Blower
Parts Used:
Spark Plug - 791-610311B
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
, Socket wrench
Blower wouldn't start
Changed spark plug. Only needed a socket wrench
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Discussion
Discussion for Spark Plug - ( 791-610311B )
Discussion is closed. To ask our experts a question about a part, use the Q&A feature.
Question: Spark Plug Gap

dsheinz

For Bolen BL100, looking for gap on the spark plug.
WJA
Hello dsheinz,

The correct spark plug gap for the Bolens BL100 is 0.020 in. or 0.5 mm, according to the owners manual.

-WJA
WJA
Question: Sparkplug

PapaBill

Hello PapaBill,

According to the manufacture, the spark plug gap is .025.

Hope this helps,
-WJA
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    The parts were delivered on time and fit just like the original parts.
    Guest - July 3, 2020 Verified Purchase
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    Product Information
    Manufacturer: Ryobi, Troy-Bilt, Bolens, Yard Man, MTD, Yard Machines, Cub Cadet, Husky
    Product Number: 791-610311B
    Classification: Part
    Weight: 0.01 lbs.
    Shipping: Ships Worldwide
    Repair Guides
    Watch the Repair Video for Spark Plug
    Articles:
    Sparks not flying? Learn to quickly remove and install the spark plug on your Ryobi trimmer. Simple instructions show yo...
    September 08, 2015
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