When it comes to maintaining your Husqvarna equipment, whether it’s a chainsaw, trimmer, mower, or brushcutter, the spark plug is a tiny yet crucial component that keeps your machine running efficiently. Using the wrong spark plug can lead to engine misfires, poor performance, and even long-term damage.
That’s why having an accurate Husqvarna spark plug chart is essential for every owner and DIY mechanic.
In this post, you’ll find a detailed compatibility chart for various Husqvarna models, based on model type and engine size. Plus, we’ll cover some pro tips for checking, replacing, and choosing the right plug.
Husqvarna Spark Plug Chart
| Equipment Type | Model | Engine Type | OEM Spark Plug | NGK Equivalent | Champion Equivalent |
|---|---|---|---|---|---|
| Chainsaw | 120 Mark II | 38cc | Husqvarna 503235111 | BPMR7A | RCJ7Y |
| Chainsaw | 435 | 40.9cc | Husqvarna 503235111 | BPMR7A | RCJ7Y |
| Chainsaw | 455 Rancher | 55.5cc | Husqvarna 503235111 | BPMR7A | RCJ7Y |
| Chainsaw | 572 XP | 70.6cc | Husqvarna 503235111 | BPMR7A | RCJ7Y |
| Chainsaw | 240 | 38.2cc | Husqvarna 503235111 | BPMR7A | RCJ7Y |
| Chainsaw | T435 | 35.2cc | Husqvarna 503235111 | BPMR7A | RCJ7Y |
| String Trimmer | 128LD | 28cc | Husqvarna 952030150 | BPMR7A | RCJ7Y |
| String Trimmer | 525L | 25.4cc | Husqvarna 952030150 | BPMR7A | RCJ7Y |
| Brushcutter | 535RXT | 34.6cc | Husqvarna 503235111 | BPMR7A | RCJ7Y |
| Leaf Blower | 125B | 28cc | Husqvarna 952030150 | BPMR7A | RCJ7Y |
| Leaf Blower | 350BT | 50.2cc | Husqvarna 503235111 | BPMR7A | RCJ7Y |
| Hedge Trimmer | 122HD60 | 21.7cc | Husqvarna 952030150 | BPMR7A | RCJ7Y |
| Hedge Trimmer | 522HDR60S | 22.5cc | Husqvarna 952030150 | BPMR7A | RCJ7Y |
| Pole Saw | 525PT5S | 25.4cc | Husqvarna 503235111 | BPMR7A | RCJ7Y |
| Pole Saw | 330iP | Battery Operated | N/A | N/A | N/A |
| Lawn Mower | LC221RH | Honda GCV160 | NGK BPR6ES | BPR6ES | RN9YC |
| Lawn Mower | LC221A | Briggs & Stratton | J19LM | – | J19LM |
| Lawn Mower | LB548S e | Kohler XT675 | Champion 8813 (RJ19LMC) | RJ19LMC | RJ19LMC |
| Lawn Tractor | YTH22V46 | Briggs & Stratton 22 HP | 491055S | BKR5E | RJ19LM |
| Lawn Tractor | TS 354XD | Kawasaki FR Series | NGK BPR4ES | BPR4ES | RN11YC4 |
| Zero Turn Mower | Z254F | Kawasaki FR730V | NGK BPR4ES | BPR4ES | RN11YC4 |
| Zero Turn Mower | MZ61 | Briggs & Stratton 27 HP | 491055S | BKR5E | RJ19LM |
| Snow Blower | ST224 | 208cc Husqvarna Engine | Husqvarna 503235111 | BPMR7A | RCJ7Y |
| Snow Blower | ST330 | LCT 414cc Engine | Champion 794-00082 | – | 794-00082 |
| Tiller | CRT900 | 208cc Husqvarna Engine | Husqvarna 503235111 | BPMR7A | RCJ7Y |
| Tiller | DRT900H | Honda GCV160 | NGK BPR6ES | BPR6ES | RN9YC |
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Why the Right Spark Plug Matters
Before we dive into the chart, let’s quickly touch on why this small part plays such a big role:
- Ignition Efficiency: Spark plugs ignite the air-fuel mixture in the engine.
- Fuel Economy: Proper plugs enhance combustion, lowering fuel waste.
- Longevity: The right spark plug prevents carbon buildup and overheating.
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How to Find the Right Spark Plug
Finding the right spark plug for your Husqvarna machine depends on three key factors:
- Engine Type & Size: Check your owner’s manual or engine label.
- Manufacturer Cross-Reference: Use OEM part numbers or plug equivalents like NGK or Champion.
- Thread Size & Heat Range: Not all plugs fit every model—even with the same thread diameter.
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When Should You Replace a Spark Plug?
Even high-quality spark plugs wear out. Replace them every:
- Season or 100 hours of use
- If the engine is hard to start
- When there’s visible damage or carbon build-up
How to Check Your Spark Plug (Step-by-Step)
- Turn off engine and let it cool.
- Remove the spark plug boot.
- Use a spark plug wrench to remove it.
- Inspect:
- Black soot = too rich
- White deposits = too lean
- Oily plug = possible oil leak
- Check the gap using a feeler gauge.
- Clean or replace as needed.
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Recommended Spark Plug Tools
| Tool | Purpose |
|---|---|
| Spark Plug Wrench | For safe removal and tightening |
| Feeler Gauge | Measures spark plug gap precisely |
| Wire Brush | Cleans old spark plugs |
| Gap Tool | Adjusts spark plug gap manually |
Expert Maintenance Tips
- Always use resistor-type plugs (like NGK BPMR7A) for 2-stroke engines to reduce electromagnetic interference.
- Pre-gapped plugs are not always correct, check gap before installation.
- For prolonged storage, remove the spark plug and add a drop of oil to the cylinder to prevent rust.
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FAQs
What spark plug fits a Husqvarna 455 Rancher?
The NGK BPMR7A or Champion RCJ7Y are compatible with the 455 Rancher.
How often should I replace my spark plug?
Every season or 100 hours of use, whichever comes first.
Can I use a non-OEM spark plug?
Yes, as long as it matches the heat range and size, brands like NGK or Champion work well.
What is the correct gap for Husqvarna spark plugs?
Typically 0.020 to 0.030 inches (0.5 to 0.75mm), but always check your user manual.
Are all Husqvarna spark plugs the same?
No, they vary by engine model and size. Always refer to a compatibility chart like this.
My chainsaw won’t start. Is it the spark plug?
Possibly. Check for spark, clean or replace the plug, and inspect the ignition system.
Final Thoughts
The Husqvarna spark plug chart above offers a quick and reliable way to identify the correct replacement plug for your machine. Whether you’re running a powerful chainsaw or a quiet string trimmer, the right spark plug ensures smooth performance, long engine life, and easier maintenance.
Using the correct spark plug is one of the simplest yet most powerful ways to extend the life of your Husqvarna tools. Bookmark this chart or print it out, it could save you a lot of headaches down the road!
