Do you use 40 1 or 50 1 gas in a chainsaw?
For the Craftsman chainsaw model 358362180, use a 40:1 gasoline-to-2-cycle-oil mix. Our manual for this model specifies mixing 3.2 oz of synthetic 2-cycle, air-cooled engine oil with 1 gallon of unleaded gasoline; see the 358362180 operator's manual.
- Use fresh, unleaded gasoline (stale fuel causes hard starting and rough running).
- Use synthetic 2-cycle oil labeled for air-cooled engines.
- Measure accurately: 3.2 oz oil per 1 gallon gas.
- Mix in an approved fuel can; add oil first, then gasoline, then cap and shake.
- Make small batches you will use soon.
Using 50:1 in a saw designed for 40:1 reduces the oil in the mix.
| Mix ratio | Oil per 1 gallon gas | Use on model 358362180 |
|---|---|---|
| 40:1 | 3.2 oz | Yes; specified fueling mix |
| 50:1 | 2.6 oz | No; less lubrication than specified |
Fuel mix is only part of keeping a 2-cycle chainsaw healthy.
- Fill bar and chain oil every time you fuel.
- If it runs rough or won’t stay running, inspect the fuel system for cracks and restrictions.
- Replace deteriorated lines with the chainsaw fuel line kit 545180832.
- If fuel flow seems restricted, check the in-tank filter; the assembly-fuel filter 575960701 is the model-matched part.
The correct 40:1 mix protects the piston and cylinder, improves reliability under load, and helps prevent overheating and premature engine wear.
Last updated: February 2026
Does a Craftsman chainsaw have a fuel filter?
Yes. The Craftsman 358362180 gas chainsaw uses an in-tank fuel filter on the end of the fuel line to help keep debris out of the carburetor; it is a normal maintenance item and is replaced periodically as part of routine service (see the 358362180 operator's manual).
The fuel filter sits inside the fuel tank, attached to the pickup fuel line. Its job is to protect the fuel system so the carburetor can meter the correct 40:1 fuel mixture.
- Located inside the fuel tank (not in the air filter area)
- Connects directly to the fuel line pickup
- Helps prevent hard starting, surging, and rough running
- Should be replaced during scheduled maintenance
Follow the safety and service steps in the manual; the standard process is:
- Disconnect the spark plug boot before service.
- Run the saw dry to drain fuel from the system.
- Remove the fuel cap and retainer.
- Pull the filter out of the tank and remove it from the fuel line.
- Install the new filter and reassemble.
If you need the correct replacement part for this model, use the model-specific assembly-fuel filter 575960701.
| Symptom | Common fuel-filter clue | Also check |
|---|---|---|
| Won’t start | Starts briefly on choke then dies | Fuel mix freshness, spark plug |
| Runs rough | Improves at idle but bogs on throttle | Air filter, carburetor |
| Loses power under load | Acts fuel-starved at high RPM | Fuel line cracks, tank vent |
A restricted fuel filter can make the engine run lean, which causes poor performance and can lead to overheating. Replacing the filter on schedule helps protect the carburetor and keeps your Craftsman chainsaw cutting consistently.
Last updated: February 2026
What are the main parts of a chainsaw?
On the Craftsman 358362180 gas chainsaw, the main parts break into three systems: the powerhead (engine and controls), the cutting system (guide bar and chain), and the safety/handling system (handles and guards). These parts work together to cut efficiently while helping you stay in control.
- Powerhead (engine unit): provides power; includes the throttle trigger and ON/STOP switch.
- Cutting system: the guide bar supports the chain, and the saw chain does the cutting.
- Chain brake and front hand guard: helps stop the chain quickly in a kickback event.
- Fuel system: fuel tank, fuel line, and fuel filter deliver fuel to the carburetor.
- Oiling system: oil tank and oil delivery components lubricate the bar and chain.
For diagrams and model-specific component names, we recommend using the 358362180 owner's manual.
The cutting system takes the most wear. For this model, common service items include:
- Guide bar (bar rails wear, nose sprocket wear)
- Saw chain (dulls and stretches)
- Bar adjustment tool (used to set chain tension)
| Part of the saw | What it does | Common symptom when worn/misadjusted |
|---|---|---|
| Guide bar | Guides the chain and supports the cut | Crooked cuts, excessive vibration |
| Saw chain | Cuts the wood | Slow cutting, sawdust instead of chips |
| Chain tension adjuster | Sets chain slack | Chain sags or binds on the bar |
Model-matched examples include the chainsaw bar, 18-in 180SDET041 and the chain 91PX062G.
Knowing the main parts helps you troubleshoot faster and maintain the saw safely. For example, the manual recommends checking chain tension before first use and frequently during operation, since chains stretch, especially when new.
- Stop the engine before setting the saw down.
- Carry the saw only with the engine stopped.
- Check for loose fasteners and parts (bar nuts, chain, muffler, handle screws).
- Keep the chain out of dirt and sand to reduce dulling and kickback risk.
Last updated: February 2026
What is the Craftsman 358362180 42 cc 2 cycle gas 18 chainsaw?
The Craftsman model 358362180 is a 2-cycle gasoline chainsaw built around an 18-inch bar cutting system and designed for homeowner cutting tasks like limbing and firewood. Our operator information for this model lists it as a 2.4 cu. in. (40cc) saw and specifies a 40:1 fuel mix.
These are the key identifiers and operating basics called out for this specific Craftsman chainsaw:
- Model number: 358362180
- Engine type: 2-cycle, air-cooled gasoline engine
- Engine size: 2.4 cu. in. (40cc)
- Guide bar length: 18 in.
- Fuel mix ratio: 40:1 (3.2 oz 2-cycle oil per 1 gallon unleaded gasoline)
For the full safety rules, starting steps, and maintenance intervals, use the 358362180 operator’s manual.
Using the correct fuel mix and keeping the bar oil tank filled prevents hard starting, poor cutting, and premature wear.
| Item | What to use | What to do every time |
|---|---|---|
| Fuel tank | Unleaded gasoline mixed 40:1 with 2-cycle air-cooled engine oil | Mix 3.2 oz oil per 1 gallon gas |
| Bar oil tank | Chainsaw bar and chain oil (SAE 30 acceptable short-term) | Fill bar oil whenever you refuel |
If you are servicing the bar and chain system, these parts are commonly replaced:
- Chainsaw bar, 18-in 180SDET041 (guide bar)
- Chain 91PX062G (saw chain)
- Chainsaw bar adjuster tool 530031163 (helps set chain tension)
Matching the correct 18-inch bar and chain and using the 40:1 fuel mixture specified for Craftsman 358362180 keeps the engine lubricated and the cutting system running cooler, which improves performance and extends component life.
Last updated: February 2026





