Owner’s manual
Should I use 40 1 or 50 1 fuel for a chainsaw?
For the Craftsman 358356241 gas chainsaw, we use a 40:1 gasoline-to-2-cycle-oil mix. That ratio provides the lubrication this 2-cycle, air-cooled engine needs; using too little oil can overheat and seize the engine, while too much oil can foul the spark plug. See the owner's manual.
Quick mix guide (40:1)
Use fresh, clean unleaded gasoline and quality 2-cycle oil made for air-cooled engines.
- 1 gallon gas: 3.2 fl oz 2-cycle oil
- 2.5 gallons gas: 8 fl oz 2-cycle oil
- Mix in an approved fuel container; shake thoroughly before filling the tank
- Do not mix gas and oil directly in the chainsaw fuel tank
- Use up old fuel; stale mix can cause hard starting and carburetor issues
| Ratio | What changes | What you may notice |
|---|---|---|
| 40:1 | More oil (richer oil mix) | Better lubrication; more smoke; higher chance of plug fouling if over-oiled |
| 50:1 | Less oil (leaner oil mix) | Cleaner exhaust; less margin for lubrication on a saw designed for 40:1 |
If the saw smokes a lot or keeps fouling plugs
These checks help you correct the cause without risking engine damage.
- Confirm you measured oil correctly (too much oil is the most common cause)
- Replace or clean the air filter; a restricted filter can affect running (see air filter 545057701)
- Use fresh fuel mix; old fuel breaks down and creates deposits
- Check the spark plug condition and gap per the owner's manual
- If it still runs poorly, the carburetor may need service (a rebuild is often addressed with a kit such as repair kit 530069826)
Why it matters
A 2-cycle engine depends on the fuel mix for lubrication. Running lean on oil (for example, using 50:1 when the saw is designed for 40:1) increases friction and heat, which leads to rapid wear and possible seizure. Running too oily can reduce performance and foul the spark plug.
Last updated: February 2026
What does 72 mean on a chainsaw chain?
On a chainsaw chain, 72 most often means the chain has 72 drive links (the links that ride in the guide bar groove). For your Craftsman 358356241 chainsaw, the correct chain must match pitch, gauge, and drive link count; the bar stamp and the owner's manual are the fastest ways to confirm the exact combination.
How to confirm what “72” refers to
Check these spots in this order:
- Guide bar stamp: many bars list pitch, gauge, and drive links in one line.
- Old chain packaging (if you still have it): usually lists all sizing specs.
- Drive link count: count the drive links if the chain is off the saw.
- Chain stamp: some chains include a code that is not the drive link count.
- Manual specs section: look for bar and chain specifications in the owner's manual.
What must match for the chain to fit
A replacement chain is correct only when all three specs match:
- Pitch (spacing of the chain links)
- Gauge (thickness of the drive links that fit the bar groove)
- Drive links (often the “72” you see)
Quick sizing table
| Spec | What it affects | What happens if it’s wrong |
|---|---|---|
| Pitch | Fit on the sprocket and bar nose | Won’t mesh correctly; unsafe operation |
| Gauge | Fit in the bar groove | Too loose or won’t fit in the groove |
| Drive links (ex: 72) | Overall chain length | Too short to install or too long to tension |
Why it matters
Using the wrong pitch, gauge, or drive link count can cause poor cutting, thrown chains, and extra wear on the clutch, sprocket, and guide bar. Keeping the chain properly tensioned and maintained also helps reduce kickback risk, which is emphasized in the Craftsman safety guidance.
Related parts we commonly replace during chain and bar service
If you are refreshing the cutting system, these model-matched parts are commonly involved:
- Bar 180SDEA041 (guide bar)
- Clutch assembly 530014949 (drives the chain through the sprocket)
- Drum 530047061 (clutch drum component)
Last updated: February 2026
How do I find the model number on my 358356241?
The model number for your Craftsman gas chainsaw is printed on the saw near the serial number. On model 358356241, the operator’s manual notes the model number is found below the top handle with the serial number; use that exact number when ordering parts or requesting service (see the 358356241 owner's manual).
Where to look on the saw
Check these common ID locations first:
- Below the top handle, near the serial number (most common for this model)
- On a decal or label on the rear handle area
- On the crankcase or starter housing label
- Near the bar mounting area (side cover region)
What the label should look like
You are looking for a model identifier formatted like this:
| Item on label | What it’s used for | Example for this saw |
|---|---|---|
| Model number | Correct diagrams and part fit | 358356241 |
| Serial number | Production run identification | Varies |
Why it matters for parts and diagrams
Using the full model number ensures we match the correct parts list and diagrams for your exact Craftsman chainsaw configuration (bar, clutch, oiling system, and ignition components can vary by model).
When you will need the model number
- Ordering replacement parts like an air filter 545057701
- Looking up bar and chain related items such as the bar 180SDEA041
- Confirming the correct ignition or stop switch components
- Using the repair parts list and exploded diagrams
Last updated: March 2026
