Owner’s manual
Should I use 40 1 or 50 1 fuel for a chainsaw?
For the Craftsman 358350980 gas chainsaw, use the fuel-to-oil ratio specified in the 358350980 owner's manual. In general, 50:1 is the most common modern 2-cycle mix for everyday cutting, while 40:1 adds more oil for extra lubrication but can increase smoke and carbon buildup.
Quick recommendation
- Follow the ratio printed in the manual or on the saw’s fuel cap area (if labeled).
- If you are unsure and the saw is stock (not modified), 50:1 with quality 2-cycle oil is the typical baseline.
- Use fresh, properly mixed fuel; old fuel causes more no-start and rough-run problems than the exact ratio.
40:1 vs 50:1: what changes
- 40:1: more oil in the mix; more lubrication, more exhaust smoke, more deposits possible.
- 50:1: less oil; cleaner running, less carbon, standard for many newer saws.
- Too much oil can foul the spark plug and clog the spark arrestor screen.
- Too little oil can accelerate piston and cylinder wear.
| Mix ratio | Oil per 1 gallon gas | Best for | Common downside |
|---|---|---|---|
| 50:1 | 2.6 oz | General homeowner use | Less margin if fuel is lean or saw runs hot |
| 40:1 | 3.2 oz | Heavy cutting, older/high-hour saws | More smoke, carbon, plug fouling |
Mixing tips we use to prevent engine damage
- Use ethanol-free gas when available; otherwise do not store mixed fuel long-term.
- Measure oil with a marked mixing bottle; do not “eyeball” it.
- Shake the can before refueling so oil stays suspended.
- If the saw runs rough after changing mix, check the air filter and fuel delivery; a restricted filter or cracked fuel line can mimic a bad mix.
Why it matters
The correct 2-cycle mix protects the crank bearings, piston, and cylinder while keeping the carburetor and exhaust (spark arrestor) from loading up with carbon. The right ratio also helps the saw start easier and hold a steady idle.
For starting issues that seem fuel-related, use tips for a hard to start chainsaw as a fast checklist.
Last updated: February 2026
What is the Craftsman 358350980 42 cc 2 cycle gas 18 chainsaw?
The Craftsman model 358350980 is a gas-powered, 2-cycle chainsaw model used for typical homeowner cutting tasks such as limbing and cutting firewood. For the correct operating controls, fuel and bar oil setup, and safety procedures for this exact model, use the 358350980 owner’s manual.
What it is (and what to verify on your saw)
Model 358350980 is identified by its model number; bar length and engine size can vary by configuration and what has been installed over time. We recommend confirming these items on your specific saw before buying a chain, bar, or engine parts:
- Engine displacement marking on the engine housing
- Guide bar length stamped on the bar (inches)
- Chain pitch and gauge listed on the bar or in the manual
- Whether your saw has a chain brake (look for the front hand guard brake lever)
- Fuel type requirement (2-cycle fuel mix) and bar/chain oil requirement
Parts and systems you will service most often
These are common service areas for the Craftsman 358350980, based on the parts available for this model:
- Air intake and filtration: ayp chainsaw air filter 575296301
- Fuel delivery and sealing: fuel tank cap 580940901, ayp chainsaw fuel line fitting 530023877
- Fuel metering: ayp chainsaw carburetor 573952201
- Starting system wear items: recoil pulley, springs, and hubs
Quick reference: what the model number tells you
| Item | What it tells you | Why it matters |
|---|---|---|
| Model number 358350980 | The correct parts breakdown for your saw | Prevents ordering the wrong carburetor, fuel parts, or starter parts |
| Bar and chain markings | The cutting setup currently installed | Ensures the replacement chain matches pitch and gauge |
| Manual procedures | Starting, fueling, and adjustments | Reduces hard-starting, stalling, and premature wear |
Why it matters
Chainsaws are often described by bar length and cc, but the model number is what reliably matches the correct Craftsman parts and procedures. Using the manual and the markings on your saw helps you buy the right chain and tune-up parts the first time.
Last updated: February 2026
What model number is a Craftsman 358350980 16 36cc chainsaw?
The model number for this Craftsman gas chainsaw is 358350980. If your saw is described as a 16-inch, 36cc Craftsman, confirm the exact model by matching the number on the data tag to the model shown in the Craftsman 358350980 owner's manual.
Where to find the model number on the saw
On most Craftsman chainsaws, the model number is printed on a label (data tag) on the saw body. Check these common spots:
- Rear handle area near the trigger
- Starter housing (recoil starter) side
- Under or near the air filter cover
- Near the oil and fuel cap area
- Crankcase area close to the bar mount studs
Model number vs. bar length and engine size
A 16-inch bar and 36cc engine description is a common configuration, but it is not the model number by itself. Use the model number to get the right parts list and diagrams.
| What you have | What it tells you | What to use for parts lookup |
|---|---|---|
| 16-inch bar | Cutting length setup | Model number on the data tag |
| 36cc engine | Engine displacement class | Model number on the data tag |
| 358350980 | Exact Craftsman model | Correct match for parts and manual |
Why it matters
Using the exact model number prevents ordering the wrong chain, carburetor, fuel line parts, or starter components. Even small changes between similar 358-series Craftsman chainsaws can affect fit and fuel system routing.
Quick parts cross-check (common wear items)
If you are confirming you are on the right parts list for model 358350980, these are common replacement categories to compare against what is installed on your saw:
- Air filter (shape and mounting)
- Fuel cap and fuel line routing
- Chain brake style
- Starter recoil parts
- Carburetor mounting pattern
Last updated: February 2026
Where is the fuel filter in a Craftsman chainsaw?
On the Craftsman 358350980 gas chainsaw, the fuel filter sits inside the fuel tank, attached to the end of the fuel line. You access it by removing the fuel tank cap and gently pulling the fuel line and filter out through the filler opening (then reinstalling it back into the tank).
How to find and remove the fuel filter
- Shut the engine off and let it cool completely.
- Move to a well-ventilated area away from sparks or flames.
- Remove the 358350980 owner's manual recommended covers or steps for fuel system access.
- Unscrew the fuel cap and look into the tank for the fuel line.
- Use a clean bent wire hook or long needle-nose pliers to grab the fuel line, not the filter body.
- Pull the line up just far enough to reach the filter, then twist and pull the filter off the line.
What to check while you are in the tank
A clogged filter often causes hard starting, stalling, or a saw that only runs with choke on.
| What you see | What it usually means | What to do next |
|---|---|---|
| Filter looks dark or gummy | Restricted fuel flow | Replace the filter and refresh fuel mix |
| Fuel line is stiff or cracked | Air leak or fuel restriction | Replace fuel lines and fittings |
| Debris or water in tank | Contaminated fuel | Drain tank, rinse, refill with fresh mix |
Related parts that commonly affect fuel delivery
If the saw still runs poorly after a filter change, these model-matched parts are common next checks:
- Fuel tank cap 580940901 (a loose or damaged cap can contribute to fuel issues)
- Ayp chainsaw fuel line fitting 530023877 (leaks or restrictions at the fitting)
- Ayp chainsaw carburetor 573952201 (varnish or internal wear can mimic a clogged filter)
Why it matters
The fuel filter is the first line of defense for the carburetor. Keeping it clean helps the 358350980 start easier, idle smoother, and reduces the chance of carburetor damage from dirt or degraded fuel.
Last updated: February 2026
Where is the model number on a chainsaw?
On the Craftsman chainsaw model 358350980, the model number is typically printed on the product identification label or ID tag on the saw body (often near the rear handle, starter housing, or fuel tank area). Check the label first, then confirm the number against the 358350980 owner's manual.
Common places to check on a gas chainsaw
Look for a sticker, metal tag, or stamped plate in these spots:
- Rear handle area (near the trigger and hand guard)
- Starter/recoil housing side (near the pull cord cover)
- Fuel tank area (on or near the tank housing)
- Bottom of the saw body (underside of the chassis)
- Near the bar mount studs (behind the clutch cover)
Quick ID checklist (so you get the right parts)
Use this checklist before ordering parts like a carburetor, fuel cap, or ignition module:
- Wipe dirt and oil off the label with a dry rag first
- Copy the model number exactly (for this saw: 358350980)
- Note any extra numbers on the tag (type, serial, or production code)
- Match the model number to the parts list in the manual
- If the label is missing, compare your saw’s assemblies (starter, chain brake, fuel system) to the diagrams
What to do if the label is damaged or missing
If the label is unreadable, we use the ID tag information and visual matches to narrow it down.
| What you can still use | Where it helps most |
|---|---|
| Serial/production code | Confirms version changes over time |
| Engine and starter layout | Matches the correct recoil and ignition parts |
| Fuel system style | Helps match fuel cap and fuel line fittings |
Why it matters
The model number is the fastest way to ensure parts fit correctly, especially for fuel and ignition items where small design changes affect compatibility. For example, the correct fuel tank cap 580940901 depends on matching the exact model family and configuration.
Last updated: February 2026
