This replacement armature-magneto also known as an ignition module is specially designed for use with Briggs and Stratton engines commonly used on Toro lawn and garden equipment. It is a genuine OEM sourced item that is sold individually. The purpose of this item is to produce pulses of high voltage for the spark plugs. Please note, the spark plug boot is sold separately.
To complete this repair you will need screwdriver set.
Armature-magneto 398811
OEM part for: Briggs and Stratton, Toro, Lawn Boy, Murray
Part Number: 398811
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Product Description ?
- Classification: Part
- Weight: 0.10 lbs.
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This Armature-magneto will fit the following 6815 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Briggs and Stratton
Toro
Lawn Boy
Murray
Show More Compatible ModelsThis item works with the following types of products:
- Engine Parts
- Snowblower Parts
- Lawn Mower Parts
- Lawn Tractor Parts
This part replaces obsolete part #: 398265, 395492, 395326
Customer Part Reviews ?
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Questions & Answers ?
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Does this fit my product?Questions & Answers for Armature-magneto
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.
A mouse ate the spark plug wire off the magneto
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set
Parts Used
Mice Munched on Spark plug wire
Tool Type
Lawn Tractor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set, Wrench Set, Nutdriver, Feeler Gauges .003 ths.
Parts Used
Part was original and spark plug wire had worn through
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Socket set, Nutdriver
Parts Used
Removed old armature, then cleaned that area.
Installed new armature at proper gap measurement.
Also check the machines wiring.
I had a couple wires worn through that were making bad grounds.
I fixed these and then added some wire loom to protect wiring.
Put everything back together and worked great.
While doing this I replaced the spark plug , air filter, fuel filter, cleaned carb.
Rotor switch broke. Magneto produced no spark.
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set, Nothing else required
Parts Used
2.removed starter rope housing to access magneto
3.removed and replaced magneto and set the air gap with the gauge provided.
4.removed and replaced rotor switch.
5.reassembled the housing and engine now functions .
lawn more had no spark
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set, Nutdriver
Parts Used
The armature magneto was out in my old mower. This mower is close to 20 years old and it has an 11 1/2 horse B&S motor. The engine would run until it got hot, initially, and then it would shut down un
Tool Type
Lawn Tractor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Wrench Set, Wire strippers
Parts Used
Remove the engine cover
Remove two screws that hold the armature magneto in place.
Remove the stop switch wire
Spin the flywheel so that the magnets are 180 degrees from the armature magneto.
Screw the new armature magneto on, making sure that the side that says "cylinder" is facing down. Loosely tighten the screws enough so that they stay in, but don't hold the armature magneto down. It should move in the groves.
Use the included feeler gauge to correctly gap the spacing between the armature magneto and the flywheel magnets.
Spin the flywheel back so that the magnets pull the armature magneto into position. The card feeler gauge will create the right gap. Tighten the screws.
Turn the flywheel some more and the card will come out.
Measure the sparkplug wire and cut it to the right length. Strip the wire and use the included tip to make your plug wire the right length. Crimp the tip brackets down with plyers.
Pull the boot off your old sparkplugs wire or install a new boot.
Put the boot back over the spark plug
Install the new stop switch wire, or just use the old one, if its in good condition.
Put the engine cover back on.
Reconnect the battery.
Would start but die after warmed up
Tool Type
Engine
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set
Parts Used
Installed part
Put all parts back on
Replacement of 30- year old magneto
Tool Type
Lawn Mower
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set
Parts Used
Engine would not start
Tool Type
Generator
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set, Wrench Set
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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.