Do you use 40 1 or 50 1 gas in a chainsaw?
For a Craftsman gas chainsaw model 967085101, we use the fuel-to-oil ratio specified for the engine; in practice, most modern 2-cycle chainsaws run 50:1, while 40:1 is sometimes used for extra lubrication on older designs or under heavy use.
- Use 50:1 when the engine is designed for it and you are using a quality 2-cycle oil.
- Use 40:1 only when the engine specifically calls for it, or when you are breaking in a rebuilt top end and the manufacturer allows it.
- Mix with fresh, ethanol-free fuel when possible; stale fuel causes hard starting and poor acceleration.
- Measure oil accurately; “a little extra” can foul the spark plug and carbon up the exhaust.
- Never run straight gas in a 2-cycle chainsaw.
| Mix ratio | 2-cycle oil per 1 gallon | Typical use case |
|---|---|---|
| 50:1 | 2.6 oz | Most modern chainsaws |
| 40:1 | 3.2 oz | Some older engines, heavy-duty use when allowed |
A wrong mix ratio often shows up as starting or running issues. Check these common symptoms:
- Too much oil (rich mix): smoky exhaust, plug fouling, sluggish throttle response
- Too little oil (lean on oil): overheating, scoring risk, loss of power under load
- Fuel issue (not ratio): surging, won’t idle, dies on acceleration (often stale fuel or air leak)
If you suspect a fouled plug from a rich mix, replacing the spark plug 585358205 is a fast, inexpensive first step.
The correct 2-cycle mix protects the crankshaft bearings, piston, and cylinder from heat and friction. Too little oil can damage the engine quickly; too much oil can reduce performance and increase carbon buildup.
Last updated: January 2026
What model number is the Craftsman 967085101 chainsaw?
The model number for this Craftsman gas chainsaw is 967085101. Use that exact number when ordering parts, matching diagrams, or confirming fitment because small model-number differences can change the chain, clutch, or starter components.
Most Craftsman gas chainsaws list the model number on an ID label or stamp. Check these common spots:
- On the rear handle area near the trigger
- On the crankcase housing near the bar mount
- Under the top cover (near the air filter area)
- Near the starter housing (recoil side)
Parts and assemblies can vary by model run, even when the saw looks similar. Using 967085101 helps us match the correct diagrams and parts for your chainsaw.
- Chain and bar mounting hardware
- Clutch and clutch drum style
- Chain brake components
- Recoil starter parts
- Oil pump and oiler routing
If you are confirming you are on the right parts list, these are examples of parts shown for model 967085101:
| Part type | Example part on this model | What it affects |
|---|---|---|
| Chain | Chainsaw chain 530051545 | Cutting performance and fit on the bar |
| Ignition | Chainsaw ignition module 589364701 | Spark and engine starting |
| Chain brake | Chainsaw chain brake assembly 530071893 | Safety braking function |
When the model number is correct, we can help you avoid ordering a chain, clutch, or ignition part that looks right but does not fit your Craftsman saw.
Last updated: January 2026
Where is the model number on a chainsaw?
On the Craftsman gas chainsaw model 967085101, the model number is typically printed on the saw’s ID label or ID tag on the housing. We recommend checking the areas that stay cleaner and cooler, such as near the rear handle or under the top cover.
Look for a sticker, metal tag, or stamped plate in these spots:
- Near the rear handle or trigger area
- On the starter (recoil) housing side
- Under the top/cylinder cover (near the air filter area)
- Near the bar mount area (clutch cover side)
- On the bottom of the saw body, close to the fuel and oil caps
If the label is dirty or faded, these steps usually help:
- Wipe the area with a dry rag first, then a lightly damp rag
- Use a flashlight at a low angle to make faint printing easier to see
- Take a close-up photo and zoom in to read small characters
- Avoid harsh solvents that can remove remaining print
The model number is what we use to match the correct Craftsman parts, like a spark plug, chain brake, or clutch components. Even small model differences can change the chain, bar mount hardware, or ignition parts.
Here are a few common service items for this model family:
| Part type | What it affects | Example part for this model |
|---|---|---|
| Spark plug | Starting, misfires | Spark plug 585358205 |
| Chain brake | Safety, chain stopping | Chainsaw chain brake assembly 530071893 |
| Chain | Cutting performance | Chainsaw chain 530051545 |
For model-number help and examples of where to look, use how to find your appliance model number (and what it means for parts).
Last updated: January 2026





