Craftsman 358351820 chainsaw Parts

For the Craftsman 358351820 gas chainsaw, 40:1 is the better choice because it is the manufacturer-recommended fuel mix. A 40:1 mix provides more 2-cycle oil for lubrication than 50:1, which helps protect the engine under load and during hot operation.

The manual calls out Craftsman 40:1, 2-cycle engine oil (air cooled) and also notes using fresh fuel with the proper gasoline-to-oil ratio at the start of the season. Use the ratio in the 358351820 owner's manual.

• Use fresh, unleaded gasoline (avoid old fuel).
• Measure 3.2 fl oz of 2-cycle oil per 1 gallon of gas.
• Mix in an approved fuel container; shake to blend.
• Fill the tank and tighten the cap securely.
• If you suspect fuel delivery issues after a mix change, inspect the fuel line and fittings for cracks or leaks.

50:1 is common on some newer 2-cycle engines designed and tuned for that ratio. On the Craftsman 358351820, running 50:1 reduces lubrication compared to the specified 40:1, which increases wear risk over time.

The fuel-oil ratio directly affects engine lubrication, piston and ring life, and carburetor performance. Using the specified 40:1 mix helps the saw start easier, run more consistently, and last longer.

Last updated: January 2026

The model number for a Craftsman chainsaw is printed on the model and serial label attached to the saw body. On model 358351820, the label is typically on the motor housing or handle area; copy every digit exactly so we can match the correct parts and manual.

Check these common label locations first:

• Side of the engine/motor casing
• Near the rear handle or trigger area
• Under the top cover (near the air filter cover)
• Bottom of the saw body near the oil and fuel tanks
• Near the bar mounting area (clutch cover side)

For this unit, the model is shown in the documentation as 358.351820 (often printed with a dot). When ordering parts, it is commonly entered without punctuation as 358351820.

• Write the full model number and any serial number
• Take a clear photo before the label gets oily or scratched
• Avoid guessing missing digits; clean the label and re-check
• Use the model number (not bar length) to choose parts like a chain, clutch, or carburetor

Chainsaws often share similar-looking bars, chains, and engine parts across multiple versions. Using the exact model number helps us match the correct Craftsman parts breakdown, maintenance specs, and safety information in the 358351820 operator's manual.

Last updated: January 2026

The Craftsman 358351820 is a gas-powered, 2-cycle chainsaw that uses an 18-inch guide bar and is designed for cutting limbs, firewood, and general property cleanup. Our model’s operator documentation identifies it as a 2.4 cu. in. (40cc) 2-cycle saw with an 18-inch bar.

Here are the key identifiers you can use to confirm you have the right Craftsman chainsaw model and to shop the correct parts.

• Model number: 358351820
• Engine type: 2-cycle gasoline engine
• Displacement: 2.4 cu. in. (40cc)
• Bar length: 18 in.
• Fuel mix: 40:1 (3.2 oz 2-cycle oil per 1 gallon unleaded gas)
• Bar oil guidance: Fill bar oil tank whenever you fill the fuel tank

Matching the correct Craftsman 358351820 model details helps you avoid wrong-fit parts (like the wrong chain or bar) and prevents common running issues caused by incorrect 2-cycle fuel mix or low bar-and-chain lubrication.

• Use the 358351820 operator's manual for safety rules, operation, maintenance intervals, and the parts list.
• If your saw is difficult to start, follow the checks in tips for a hard to start chainsaw (fuel freshness, correct choke use, spark arrestor condition, and more).

Last updated: January 2026