Owner’s manual
Should I use 40 1 or 50 1 fuel for a chainsaw?
For the Craftsman 358350880 gas chainsaw, we recommend a 40:1 fuel-to-oil mix. The operator’s manual specifies mixing 3.2 oz of 2-cycle air-cooled engine oil per 1 gallon of unleaded gasoline; using 50:1 in this model can reduce lubrication and increase engine wear.
What to use for model 358350880
Follow the fuel instructions in the 358350880 operator's manual. Use:
- Fresh, unleaded gasoline
- High-quality synthetic 2-cycle air-cooled engine oil
- A clean, approved fuel container
- A 40:1 ratio (3.2 oz oil to 1 gallon gas)
Quick mix chart
| Fuel amount | 40:1 oil amount | Notes |
|---|---|---|
| 1 gallon | 3.2 oz | Manual-specified mix |
| 1/2 gallon | 1.6 oz | Mix thoroughly |
| 1 quart | 0.8 oz | Use a measuring bottle |
Why 40:1 vs 50:1 matters
Two-cycle engines rely on oil in the fuel for lubrication. If you run lean on oil (like 50:1 when the saw calls for 40:1), you can increase friction and heat, which can shorten the life of the piston, cylinder, and crank bearings.
Tips to avoid fuel-related problems
- Shake the container after adding oil to fully blend the mix
- Mix only what you will use soon; old fuel can cause hard starting and rough running
- Avoid fuel that has been sitting for extended periods
- If the saw starts acting fuel-starved (surging, dying at throttle), inspect the fuel system
If you suspect a restriction in the tank or fuel pickup, replacing the Craftsman lawn & garden equipment engine fuel filter 530095646 is a common first step on this model.
Last updated: January 2026
What are the most common issues with 358350880?
The most common problems we see on the Craftsman 358350880 gas chainsaw are hard starting, fuel leaks, poor idle or rough running, chain not oiling, and starter or chain-brake issues. These symptoms usually trace back to the fuel system, carburetion, ignition, or the bar-and-chain oiling system.
Most common symptoms and what to check first
- Won’t start or is hard to start: stale fuel mix, cracked fuel line, dirty carburetor, weak spark
- Runs rough or won’t idle: air leak at carb area, carburetor out of tune, restricted muffler screen
- Leaking gas: split fuel line, loose/failed cap, leaking fuel line fitting
- Chain not oiling: empty oil tank, plugged oiler port, failing oil pump
- Pull cord won’t retract: worn recoil parts or broken starter spring
- Chain keeps spinning at idle: clutch problem or idle speed set too high
Quick troubleshooting checklist (safe, high-impact)
- Engage the chain brake before any checks.
- Drain old fuel; refill with fresh, correctly mixed 2-cycle fuel.
- Inspect fuel lines for softness, cracks, or wet spots; replace as needed.
- Check the spark plug condition and gap; replace if fouled.
- Clean the spark arrestor screen if power is low.
- Verify bar oil flow by running briefly over clean cardboard; look for an oil line.
Parts that commonly solve these issues
| Symptom | Likely part area | Example part for this model |
|---|---|---|
| Hard start, fuel smell, fuel leak | Fuel line and fittings | Ayp lawn & garden equipment fuel line, large 530069216 |
| Fuel leak around fill | Fuel cap | Fuel tank cap 580940901 |
| No bar oiling | Oiling system | Gas chainsaw oil pump assembly 581071401 |
| Pull cord issues | Recoil starter | Chainsaw recoil starter repair kit 530071966 |
| Chain won’t stop quickly | Chain brake | Chainsaw chain brake assembly 530071893 |
Why it matters
Fuel leaks and a non-functioning chain brake are safety issues; poor oiling quickly ruins the bar and chain. Catching these early prevents bigger repairs like piston and cylinder damage.
Helpful model-specific references
Use the 358350880 owner’s manual for starting steps, adjustments, and maintenance intervals.
Last updated: March 2026
Where is the model number on my Craftsman chainsaw?
On the Craftsman chainsaw model 358350880, the model number is typically printed on a decal or label on the saw body, most often on the engine/motor housing area. Check the side of the housing first, then the rear or underside if you do not see it right away; confirm it matches 358.350880 in the 358350880 operator's manual.
Common places to check on model 358350880
- Side of the engine/motor casing near the starter housing
- Near the rear handle area (back side of the saw body)
- Underside of the saw body (bottom of the housing)
- Near the cylinder cover or around the on/stop switch area
- On or near the fuel tank or oil tank area (label on the housing, not on the caps)
Tips to record the model number correctly
- Write down every digit exactly as shown (including any dots, such as 358.350880)
- Take a clear photo of the label before it gets dirty or worn
- Clean sawdust and oil film off the label with a damp cloth so the characters are readable
- Use the model number (not the bar length) when looking up parts like a chain, carburetor, or fuel filter
Model number vs. what you see on the saw
| What you see | What it means | Example for this saw |
|---|---|---|
| Model number | Identifies the exact chainsaw version for parts and manuals | 358.350880 |
| Bar length | Cutting length; not a model identifier | 18 in. bar |
| Engine size | Displacement; helps describe the saw | 42cc |
Why it matters
We use the model number to match the correct Craftsman parts diagrams and compatible replacement parts (for example, fuel system parts, ignition components, and bar/chain items). Using the wrong number can lead to ordering parts that do not fit.
Last updated: January 2026
