866-322-9842
Mon-Fri 7am-1am EST
Sat-Sun 7am-11pm EST

Spark Plug

Part Number: 491055S
HusqvarnaToroLawn Boy
Availability: 25+ in stock
Price: $4.22
Quantity:
Ships within 1 business day

*This part replaces obsolete part #: 594056 ((Resistor)), 491055s, 491055, 72347GS and 72347.

Description:
This is an OEM replacement part and is sold individually.

The purpose of this spark plug is to deliver an electric current from an ignition system to the combustion chamber of a gas fueled engine, igniting the air fuel mixture by the spark.

Over time a Spark Plug will become fouled because the air/fuel ratio may be set wrong, worn piston rings, carbon build up, and other factors.
It is best to replace a dirty spark plug, rather than trying to clean it.

It is important to gap your spark plug according to the owners manual of your product.
Product Information
Manufacturer: Briggs and Stratton, Husqvarna, Toro, Lawn Boy
Product Number: 491055S
Classification: Part
Weight: 0.05 lbs.
Shipping: Ships Worldwide
Related Products
Compatibility

This part is compatible with the following machines:

Briggs and Stratton
Husqvarna
Toro

Products Compatibility

This item works with the following types of products:

  • • Engine
  • • Generator
  • • Lawn Mower
  • • Lawn Tractor
  • • Pressure Washer
Questions & Answers

why do this spark plug come untorque lawn tractor 491055t plug
ambrose
Hello Ambrose, Thank you for the question. The Spark Plus is used on more then one model and some models will have different torque settings, so the the plus may not come set to the torque needed on your model and will require an adjustment. Hope this helps!
Repair Instructions: Submitted by Customers Like You
7 of 8 people found this instruction helpful
Tool Type:
Generator
Parts Used:
Spark Plug - 491055S
Carburetor - 809011
Repair Difficulty:
Easy
Time Spent Repairing:
1-2 hours
Tools Used:
Screwdriver, Socket set, Wrench Set
Generator had sat for oh 8 years. Carburetor was gummed/varnish up and inoperable, plugs fowled out so it was easier and time saving to replace the parts.
Removed the fly wheel cover the intake manifold then the carburetor, re-installed new carburetor re-installed manifold then the flywheel cover, squirt some oil in each cylinder installed the new plugs gapped at 0.030 choked carburetor then cranked oh 10 seconds then gave shot of starter fluid and hit the start switch again and within oh 3-5 seconds it started and I let it run for 10 minutes, now my 15kw generator is up and running I have no worries when loss of power comes my way now, lol, once again thank you eReplacement parts
Did you find this story helpful?
Thanks for voting and helping fellow customers!
5 of 5 people found this instruction helpful
Tool Type:
Lawn Tractor
Parts Used:
Spark Plug - 491055S
Armature Magneto - 595304
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Socket set, Wrench Set
Lawn tractor would not start, no spark at plug
1. Removed plastic engine covers.
2. Removed spark plug.
3. Connected spark plug to cable and placed on cylinder head for a ground path.
4. Cranked engine and observed no spark.
5. Removed shutoff wire from magneto and repeated (isolates any issues with other wiring), still no spark.
6. Install new magneto at farthest back position and snug the bolts.
7. Rotate flywheel until magnets align with magneto.
8. Place business card between magneto and flywheel.
9. Loosen magneto bolts and allow magnets to pull magneto to flywheel.
10. Tighten magneto bolts.
11. Remove card and rotate flywheel by hand to ensure there is no contact (will be very close)
12. Reinstall spark plug and connect wire.
13. Start and run for test, then reinstall engine covers.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
2 of 2 people found this instruction helpful
Tool Type:
Lawn Tractor
Parts Used:
Spark Plug - 491055S
Crankcase Gasket - 697110
Oil Seal - 795387
Oil Filter - 492932S
Intake Push Rod - 692003
Valve Gasket Set - 794152
Repair Difficulty:
Medium
Time Spent Repairing:
1-2 hours
Tools Used:
Screwdriver, Socket set, Wrench Set, Nutdriver, Feeler gage, spark plug gap tool
Intake push rod bent
I jumped the gun initially and pulled the engine from the tractor, thinking the connecting rod had broken. I should have checked the valve push rods first. That would have saved me the time of removing the engine from the tractor and replacing the pan gasket and crankshaft oil seal.
It was pretty simple after I determined that my problem was the push rods. I removed the bent rod installed the new one I purchased from eReplacementParts.com. Adjusted the valves(You can find several youtube videos to guide you through this procedure). The engine started right up and I mowed about two hours with it this weekend.
I wish I could tell you why the push rod bent, but I can't. If anyone has an explnation I would love to here it.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Tool Type:
Lawn Tractor
Parts Used:
Spark Plug - 491055S
Oil Seal - 795387
Fuel Filter - 845125
Air Cleaner Cartridge - 792105
Repair Difficulty:
Medium
Time Spent Repairing:
1-2 hours
Tools Used:
Screwdriver, Pliers, Socket set, Wrench Set
Oil seal leaking, needs a tune-up.
Drained oil, removed fuel line from motor, disconnected throttle cable and starter cable, removed motor from tractor.Put motor on the bench replaced lower oil seal and sparkplugs replaced oil filter. Reinstalled motor on tractor replaced fuel filter reinstalled fuel line, throttle and starter cables, replaced air filter, filled with oil start and check for leaks.




Did you find this story helpful?
Thanks for voting and helping fellow customers!
Tool Type:
Lawn Tractor
Parts Used:
Spark Plug - 491055S
Valve Seal - 690968
Crankcase Gasket - 697110
Screw (Connecting Rod) - 791118
Cylinder Head Gasket - 796584
Oil Filter - 696854
Repair Difficulty:
Expert
Time Spent Repairing:
More than 2 hours
Tools Used:
Screwdriver, Pliers, Socket set, Wrench Set, Nutdriver, valve spring compressor
Engine smoking
Removed engine, removed head, valves, opened case to check rings. Rings OK, replaced piston and side case gasket. Removed valves, lapped valve seats, replaced valve stem seal. Replaced head with new gasket. Job complete.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Tool Type:
Lawn Mower
Parts Used:
Spark Plug - 491055S
Screw (Muffler Guard) - 691003
Exhaust Gasket - 692236
Repair Difficulty:
Easy
Time Spent Repairing:
30-60 minutes
Tools Used:
Screwdriver, Wrench Set
Muffler came loos & blew the gasket
My 21 year old handy Lady removed & cleaned the old parts and reinstalled the muffler. She changed the spark plug while she was in there
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Tool Type:
Lawn Mower
Parts Used:
Spark Plug - 491055S
Filter Cartridge - 593260
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Socket set
Annual maintenance
1. Remove the spark plug cover
2. Replace the spark plug and put the cover back on
3. Replace the air filter
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Tool Type:
Lawn Tractor
Parts Used:
Spark Plug - 491055S
Filter-Oil (3-1/4" Long) - 491056
Filter-Air Cleaner Cartridge - 805113
Filter-Pre Cleaner - 805267S
Repair Difficulty:
Easy
Time Spent Repairing:
15-30 minutes
Tools Used:
Socket set
Changed oil & filter
Cleaned around filter area first
Removed the old filter
Oil placed on new filter seal
installed thightened by hand
Filled engine with oil
No leak


spark plugs - cleaned debris around the old plug fist.(important)
Removed

Installed the new plug by hand then tightened by socket wrench
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Tool Type:
Generator
Parts Used:
Spark Plug - 491055S
Pre Cleaner Filter - 492889
Air Filter Cartridge - 491384
Repair Difficulty:
Easy
Time Spent Repairing:
Less than 15 minutes
Tools Used:
Screwdriver, Nutdriver
The air filter was old and the spark plug was blackened.
This is for the Lincoln Weldanpower 3000GX with the 9HP Vangard Briggs and Stratton Engine.
For the air filter cartridge and pre-cleaner filter:
1. Remove the cover for the air filter by removing two plastic head bolts.
2. Remove old air filter and place in air filter with the brushes facing the inside of the engine, then applying the pre-cleaner filter in the blue holder of the air filter. Make sure to follow the pre-cleaner filter indicated direction(this side up).
3. Close cover by applying the two plastic head bolts.

For the spark plug:
1. Remove the spark plug wire from the spark plug.
2. Obtain the correct size of nut driver and remove old spark plug.
3. Apply new spark plug with nut driver.
4. Place back on spark plug wire.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Tool Type:
Engine
Parts Used:
Spark Plug - 491055S
Cylinder Head Gasket - 796584
Repair Difficulty:
Medium
Time Spent Repairing:
More than 2 hours
Tools Used:
Pliers, Socket set, Wrench Set, Wire brush and putty knife .
Blown head gasket and caked up spark plug.
Removed the hood. Removed the valve cover and the head. Cleaned and installed in the reverse order. Regapped the valves.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
Reviews
4.7
Average Rating (out of 5):
3 Reviews
Click to filter by ratings:
5 stars
2
4 stars
1
3 stars
0
2 stars
0
1 stars
0
  • Highest Rating
  • Most Recent
< PREV
  • 1
NEXT >
  • As described
    As described
    Guest - 11 days ago Verified Purchase
    worked good
    MY LAWN MOWER IS RUNNING GOOD
    Guest - May 7, 2019 Verified Purchase
    Ordered multiple parts
    Parts all fit fine, only negative is how long it takes to get anything. For their part they do tell you it could take eight days before they ship as parts are being sent to them from warehouses.
    Glenn - April 26, 2019 Verified Purchase
    Verified Purchase
    eReplacementParts Team
    • Highest Rating
    • Most Recent
    < PREV
    • 1
    NEXT >
    visa mastercard discover american express PayPal
    HACKER SAFE certified sites prevent over 99.9% of hacker crime.

    fancyboxy