This ignition module is a genuine OEM sourced replacement part that is specially made for use with Husqvarna chainsaws. The purpose of this part is to supply pulses of high voltage electricity to the spark plug. This ignition module is sold individually, it includes the durable rubber insulated wire and the spark plug boot.
Ignition Module 573935702
OEM part for: Husqvarna
Part Number: 573935702
7 - 12 business days
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Compatibility
This Ignition Module will fit the following 20 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Husqvarna
Show More Compatible ModelsThis item works with the following types of products:
- Chain Saw Parts
- Saw Parts
This part replaces obsolete part #: 544243801, 573935701, 505427201
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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.
Chainsaw abruptly quit running and would not restart
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Nutdriver, Torx bit
Parts Used
Saw stopped abrubtly and would not restart.
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Hex keys
No spark noted.
Replaced ignition module, saw starts and runs.
Be sure to check gap between module and flywheel magnet at 0.10, flywheel should turn freely as it passes the module.
Would not start
Tool Type
Chain Saw
Difficulty
Medium
Time
Less than 15 minutes
Tools Used
Screwdriver, Hex tool Set, .012 feeler gauge
Parts Used
2. Removed old ignition module
3. Installed new module checking gap with feeler gauge
4. Replaced starter assembly
5. Started saw to check out repair
Intermittant and no spark.
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, hex key, feeler gauge
Parts Used
Ignition Module stop firing
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Power Drill, Socket set, fila gauge
Parts Used
No spark on chainsaw
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Parts Used
Chainsaw would not start
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Chainsaw would not start
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Nutdriver, Feeler gauge, spark plug wrench
Parts Used
Chain Saw would not start, was not getting any ignition spark
Tool Type
Chain Saw
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, Hex wrench #4 (module screws)
Parts Used
Ordered the ignition module that was for my saw.
The part install was quite simple, removed top cover. then had to remove the pull start cord assembly, 4 screws (one complete assembly). The ignition module was right under a plastic cover, remover the 4 screws on the module and the spark plug wire. Installed the new module and covers. The saw started right up and has been running like new.
Thanks to the info on your web site it helped me ID the problem and order the right part.
Engine stalled and wouldn't restart. No Spark.
Tool Type
Chain Saw
Difficulty
Medium
Time
Less than 15 minutes
Tools Used
Screwdriver, Allen wrench for ignition module
Parts Used
2. Pull starter cord with plug attached and side electrode resting on engine.
3. Note lack of spark, even in dark garage.
4. Remove kill switch circuit wire attached to module & pull starter cord.
5. Note still no spark. Remove (pull cord) cover & Ignition Module.
6. Order Ignition Module from eReplacementParts using the old IM's part number.
7. Review other people's feedback for magneto to ignition module air gap (.010").
8. Discover that common business card is .010" thick & confirm with micrometer.
9. Install ignition module using business card to hold gap while tightening bolts.
10. Check that magneto does not contact ignition module when spinning.
11. Replace cover, connect kill switch wire, install/connect spark plug & air filter cover.
11. Start engine!
Note: This module failed on me before I got through a full gallon of bar oil (in 2 years). It must have been defective to fail after so few hours of use. Part number has been updated too.
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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.