Easy
30-60 minutes
This replacement spark plug is specially manufactured for use with small engines that are commonly installed on a variety of lawn and garden equipment. It is sourced directly from original equipment manufacturer and it is sold individually. Spark plugs are used to deliver the electric current from an ignition system to an internal combustion engine. Over time spark plugs will get dirty or fouled requiring replacement. You should gap your spark plug according to the owners manual of the outdoor product you have. You would need a spark plug wrench or a socket wrench to replace this spark plug.
Spark Plug 121-4199
OEM part for: Toro
Part Number: 121-4199
$10.20
In Stock
Ships within 1 business day 
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Compatibility
This Spark Plug will fit the following 113 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 20 of 113 matching models.
113 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- Toro
This item works with the following types of products:
- Lawn Mower
- Snowblower
This part replaces obsolete part #: 121-0187, 119-1961
Customer Part Reviews ?
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fast service
very fast service for the right part
Kenneth -
March 17, 2024
Verified Purchase
Exactly what I needed
My lawn mower now runs fine
Guest -
April 18, 2023
Verified Purchase
Ordering is easy and parts eas to locte
Received my orders, every time very fast and accurate.
Guest -
December 6, 2022
Verified Purchase
Questions & Answers ?
Our customer Service team is at the ready daily to answer your part and product questions.
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We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
Does this fit my product?Questions & Answers for Spark Plug
What spark plug do i need for my snowblower? Toro 518ZR. Model: 38472. Serial number: 315007517. Toro told me i need: Champion RL87YC. But i can't find it. Is there any other witch is compatible?
George
for model number 38472
asked on 2023-11-24
Hello George, Thank you for writing. The Spark Plug for this model is listed as Part Number: 121-4199. We hope this helps!
eReplacementParts Team November 24, 2023
for model # 38473 spark plug part # 121-4199What is spark plug gap?
Dave
for model number Power Clear 518 ZE
asked on 2022-10-01
Hello Dave, thank you for your inquiry. The spark plug gap is .030"/ .76mm. We hope this helps and good luck with your repair
eReplacementParts Team October 01, 2022
Serial # is 402516848. What replacement spark plug will work in this mower
Sheila
for model number 20374
asked on 2022-08-17
Hello Sheila, Thank you for contacting us. We have researched the model you have provided and have found the part you are looking for is Part Number: 121-4199. Thank you for your inquiry, good luck with this repair!
eReplacementParts Team August 17, 2022
what is the gap setting?
Daniel
for model number 20374
asked on 2022-04-14
Hello Daniel, Thank you for your inquiry. The spark plug gap is .030"/ .76mm. I hope this helps and good luck with your repair.
eReplacementParts Team April 14, 2022
Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Snow blower refused to start.
Paul - April 30, 2024
Tool Type
Snowblower
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, Wrench Set
Removed the old carburetor. Put on the new carburetor. Changed spark plugs. Changed the oil. The snow blower started on the first pull of the starter rope!
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Choke lever broke/Chute knob fell off/
RICHARD - December 7, 2020
Tool Type
Snowblower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Choke lever was a little tricky, but completed. New spark plug makes huge difference in operation.
All well. Thanks for your prompt action in sending parts.
All well. Thanks for your prompt action in sending parts.
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Scraper bar was worn, paddles were worn and I install a new spark plug each year. Snow blower is 5 years old.
Walter - November 25, 2015
👍 1 of 3 people found this instruction helpful
Tool Type
Snowblower
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, Wrench Set
Removed the old scraper bar, it was simple, unbolted each of the two paddles. Removed and installed the new plug.
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Thanks for voting and helping fellow customers!
OEM stands for Original Equipment Manufacturer and means the part you’re buying is sourced directly from the manufacturer who made your product. At eReplacementParts, we sell only genuine OEM parts, guaranteeing the part you’re purchasing is of better design and of higher quality than aftermarket parts.
Learn MoreOur product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
