Easy
15-30 minutes
This is a manufacturer approved replacement part designed for use with a variety of lawn and garden engines. The air vane spring maintains the proper tension on the air vane choking system. If it is broken, it can cause the engine to not start. To replace it you will need pliers.
Spring-air Vane 790849
OEM part for: Briggs and Stratton, Toro
Part Number: 790849
$6.57
In Stock
Ships within 1 business day 
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Compatibility
This Spring-air Vane will fit the following 4497 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
This item works with the following types of products:
- Lawn Mower Parts
Customer Part Reviews ?
Average Rating (out of 5):
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11
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Easy repair and great service, thank you!
My lawn mower working like new!
Rick -
August 30, 2023
Verified Purchase
Great Part
The part arrived in good condition and worked as expected. Lawn Mower now runs much, much better.
Guest -
September 12, 2022
Verified Purchase
The Right Part
The part arrived in good condition and quicker than I thought. Will usee replacement parts again.
Guest -
June 4, 2022
Verified Purchase
Tiny Spring does a big job
Took all of 1 minute to R&R. Vane spring controls choke operation. Too loose, choke engages, too tight, choke does not engage when starting. EZ-PZ
Richard -
November 12, 2021
Verified Purchase
The part was what I needed to make the choke work properly.
The part was in excellent condition.
Guest -
September 14, 2021
Verified Purchase
The exact part I needed.
It arrived early and took mere seconds to install and my mower now starts on the first pull!
Guest -
September 6, 2021
Verified Purchase
Another job done
This part is necessary to keep the mower I use running. It is a spring that connects the air vane to the carburetor. The air vane acts as a governor. My spring came off somehow and went missing. I've used this site before when buying parts for my dryer and was pleased again this time around. 5 stars all day.
Guest -
December 1, 2020
Verified Purchase
Part Review
part arrived promptly was a easy assembly works great thank you
Guest -
September 5, 2020
Verified Purchase
Needd to Control Motor Speed
Factory new item. Fit and worked as expected. No issues.
Guest -
June 23, 2020
Verified Purchase
Easy repair part fit like a glove
My mowers spring was lost in garage after I removed to do maintainance. A quick Internet search landed me on ereplacement. I'm glad it did, search on site was easy checkout easy and shipping was on time even with virus going on. I put the part on in 2 minutes , and mower started on first pull, purred as it should! I recommend this company and will use them in future.
Guest -
June 12, 2020
Verified Purchase
Questions & Answers ?
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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.
Air vane was missing when I purchased the used mower
Rich - October 8, 2016
👍 7 of 8 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set, Nutdriver
Removed starter rope from handle
Removed side discharge chute
Removed the gas tank
Removed the metal shroud
Installed and adjusted air vane
Reinstalled metal shroud
Reinstalled the gas tank
Installed the cover
Replaced the spark plug and air filter
Reinstalled side discharge chute
Reinstalled starter rope
Removed side discharge chute
Removed the gas tank
Removed the metal shroud
Installed and adjusted air vane
Reinstalled metal shroud
Reinstalled the gas tank
Installed the cover
Replaced the spark plug and air filter
Reinstalled side discharge chute
Reinstalled starter rope
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Springs broke
Vadim - July 23, 2023
👍 1 of 1 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Pliers, Tweezers
Parts Used
Removed the cover from the lawn mower and replaced the springs. It was easy to do
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Will not start
George - July 14, 2022
Tool Type
Lawn Mower
Difficulty
Easy
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Socket set, Nutdriver
Parts Used
Replaced carburetor and replaced old vane and governor spring
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R&R stretched out spring
Michael - August 15, 2021
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers, none
Parts Used
Took off old stretched out spring and replaced it with the new spring.
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Would not run properly
Andre - February 29, 2020
Tool Type
Lawn Mower
Difficulty
Hard
Time
15-30 minutes
Tools Used
Pliers
Parts Used
With pliers
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Lawn mower vane was broken and spring was missing.
Thomas - June 12, 2019
Tool Type
Lawn Mower
Difficulty
Medium
Time
30-60 minutes
Tools Used
Wrench Set
Parts Used
This mower belongs to my brother. Somehow, he broke the vane and lost the spring. And, it would not start. It was obvious that the vane was broken, so I ordered the part from ereplacementparts.com. After watching a YouTube video, it was easy to install. The video was instrumental in showing how to set the limits for the vane. However, the mower would not start. Adding a little gasoline to the carburetor made it run for a couple of seconds, but it would not stay running. So, I brought it to a guy who fixes mowers as a side job. He cleaned the carburetor, drained the tank, and filled it with fresh gasoline. It smoked a little in the beginning, but now runs fine. By the way, the YouTube video was produced by a regular guy, with no affiliation to any company.
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lawn mower would start but not run
charles - June 10, 2019
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Socket set, Nutdriver
These items did not fix my problem. What really fixed the problem was a good cleaning of the carburetor bowl and jet plug.
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Lawn mower ran on prime only due to faulty auto choke operation.
Don - April 2, 2019
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set, Tweezers
Parts Used
Took close up pictures with iPad while removing parts to get access to spring. Installed new delicate spring using tweezers.
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Reving and dying
Robert - July 25, 2018
Tool Type
Lawn Mower
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver
1. Took screws out of plastic cover and removed starter rope from hole in cover
2. Removed screw holding filter bracket and removed filter
3. Replaced Air Vane Spring with new one
4. Placed starter rope through hole in plastic cover
5. Replaced screws to cover.
6. Started up and ran well.
2. Removed screw holding filter bracket and removed filter
3. Replaced Air Vane Spring with new one
4. Placed starter rope through hole in plastic cover
5. Replaced screws to cover.
6. Started up and ran well.
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Choke spring was not working correctly
Gregory - August 25, 2017
👍 1 of 2 people found this instruction helpful
Tool Type
Lawn Mower
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers
Parts Used
I took off the side panel with a screwdriver and replaced the two springs.
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Our 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.
