Owner’s manual
Should I use 40 1 or 50 1 fuel for a chainsaw?
For the Craftsman 358360180 gas chainsaw, we use a 40:1 fuel mix (3.2 oz of quality 2-cycle oil per 1 gallon of unleaded gas). That ratio is the correct target for lubrication and engine protection on this model; 50:1 is leaner and not the recommended mix here.
How to mix fuel correctly (40:1)
- Use fresh, unleaded gasoline.
- Use a good-quality synthetic 2-cycle air-cooled engine oil.
- Mix 3.2 oz oil with 1 gallon gas (40:1).
- Shake the fuel container well before filling the tank.
- Mix only what you will use soon; old fuel is a common cause of hard starting and rough running.
| Mix ratio | Oil per 1 gallon gas | What it means |
|---|---|---|
| 40:1 | 3.2 oz | More lubrication; correct for model 358360180 |
| 50:1 | 2.6 oz | Less oil; can increase wear risk if the engine expects 40:1 |
What to do if you already ran 50:1
- Drain the fuel tank safely.
- Refill with properly mixed 40:1 fuel.
- Start the saw and let it run a few minutes to pull the correct mix through the carburetor.
- If it now runs rough or will not start, check for stale fuel and fuel delivery issues.
Why it matters
The oil in the mix lubricates internal engine parts. Running too little oil for a model designed for 40:1 can increase friction and heat, which shortens engine life and can lead to scoring or seizure.
For the exact fueling and handling guidance for this model, follow the 358360180 owner's manual.
Last updated: January 2026
What size is the fuel line on a chainsaw?
On the Craftsman 358360180 gas chainsaw, fuel line size is matched to the fuel tank fitting and carburetor connections, so the correct “size” is the exact replacement line specified for the model. For this model, we recommend using the correct large fuel line rather than trying to measure and guess.
How to identify the right fuel line size
Fuel line sizing on chainsaws is typically based on inside diameter (ID), outside diameter (OD), and how it seals at the tank grommet or fuel line fitting.
Use these checks:
- Match the line to the original routing and connection points (tank to carburetor).
- Confirm the line seats firmly on the fittings without clamps slipping.
- Replace any hardened, cracked, or swollen line (common cause of air leaks and hard starting).
- Inspect the tank pass-through and fitting for damage while the line is out.
- Follow the model-specific routing diagram and service notes in the 358360180 owner's manual.
Recommended replacement part for this model
For the Craftsman 358360180, use the model-matched fuel line rather than a universal bulk line.
| What you need | What it does | When to replace |
|---|---|---|
| Ayp lawn & garden equipment fuel line, large 530069216 | Carries fuel from the tank to the carburetor | Cracks, leaks, won’t stay on fitting, saw runs lean |
Why it matters
A fuel line that is even slightly loose or the wrong diameter can pull air into the fuel system. That can cause hard starting, surging, poor acceleration, or stalling, and it can also lead to fuel leaks.
Pro tip if you are troubleshooting a no-start or rough-run issue
Fuel line problems often show up with other fuel-system wear.
Check these at the same time:
- Fuel tank cap venting and seal
- Primer bulb condition
- Fuel line fitting at the tank
- Carburetor mounting and adapter seals
For step-by-step guidance, use how to replace chainsaw fuel lines.
Last updated: January 2026
How do I find the model number on my 358360180?
The model number is printed on the saw’s identification label; for this Craftsman gas chainsaw, it appears as 358.360180 (often written without the dot as 358360180). Use the label to match the correct parts list and the 358360180 owner's manual.
Where to look on the chainsaw
Check these common label locations on Craftsman chainsaws like model 358360180:
- On the rear handle area near the trigger
- On the crankcase or engine housing near the starter (recoil) cover
- Near the bar mount area (side cover/clutch cover region)
- On the bottom of the saw body near the oil and fuel tank area
What you should write down
Record the details exactly as shown on the label.
| Item on label | Example you may see | Why it matters |
|---|---|---|
| Model number | 358.360180 (or 358360180) | Ensures correct diagrams and parts fit |
| Product description | 42cc, 18 in. bar | Helps confirm you have the right manual |
| Serial number | Varies | Useful for service history and part revisions |
If the label is dirty or worn
Use these quick steps to read it safely:
- Turn the engine off and let it cool completely
- Brush off sawdust and oil; wipe with a rag and mild cleaner
- Use a flashlight at a low angle to make stamped text easier to see
- Take a close-up photo and zoom in to read small print
Why it matters
Chainsaw parts like the bar, chain, fuel line, and carburetor components vary by model. Using the exact model number (including the dot, if shown) prevents ordering the wrong parts and helps you follow the correct maintenance and safety instructions.
Last updated: March 2026
