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Duck bill valve

Small engine primer bulb. The primer bulb draws additional fuel into the carburetor to help start the engine.

Champion spark plug (RCJ6Y). The spark plug ignites the fuel and air mixture in the engine's cylinder to power the engine. If the spark plug is has fouled (if the tip of the spark plug is burnt or damaged), the engine may not start or may run rough.

MTD flange lock-nut, 1/4-20.

Nut-Locking. The manufacturer has changed vendors and the part may vary in character. Some do not have a nylon insert, however the nut is a locking type.

Husqvarna hex head blade bolt. 3/8-24 x 1 -3/8.

Out Door Power Equipment Washer. 25/32 x 1-1/4 x 16 Ga.

Champion Spark Plug (RDJ7Y). The spark plug ignites the fuel and air mixture in the engine's cylinder to power the engine. If the spark plug is has fouled (if the tip of the spark plug is burnt or damaged), the engine may not start or may run rough.

Nut hex flange

Screw, 1/4-20 x .5

Washer 3/8 Splt Lock

Filter air box 38.2cc

Fuel filter kit

Hex nut, 5/16-18 Thd.

Self Tapping Screw
Ryobi chainsaws are budget-friendly tools, which means when they need repair, it's almost always worth fixing. The good news: most failures are preventable or easy to address with OEM parts. Hard starting, rough running, and loss of cutting power are the top three issues — and all trace back to a handful of common parts.
Whether your saw won't start after winter storage, the chain won't spin, or it's sputtering under load, Repair Clinic carries genuine Ryobi chainsaw parts that fit right and perform reliably. Enter your model number below to find the exact parts you need.
Browse all Ryobi Chainsaw Parts by part. Find your exact model number on the saw body or in your manual — it's the fastest way to get the right fit.
Hard starting on a Ryobi chainsaw usually comes down to four things: a fouled spark plug (seasonal replacement is cheap insurance), a clogged carburetor (ethanol in fuel breaks down over months of storage), a stuck recoil starter (pull cord or spring), or old fuel in the tank. Start with a new spark plug and fresh fuel. If that doesn't work, the carburetor kit is next. Recoil starters are mechanical — if the cord is stuck solid, the spring may be broken and needs replacement.
Your Ryobi model number is stamped or molded into the plastic housing, usually near the top of the saw body or on the fuel tank. It starts with "RCS" or "CS" followed by numbers (e.g., RCS3335). Write it down or take a photo — it's the key to ordering the exact right parts. If you can't find it, check your receipt or original box. Model number lookup on Repair Clinic will show you every part that fits your specific saw.
Chainsaw chains come in three measurements: pitch (spacing between links — usually.325" or 3/8"), gauge (thickness of the drive link — typically.050" or.063"), and length (number of drive links). All three must match your bar and sprocket. Look at your current chain or your manual for these specs. OEM Ryobi chains are matched to your bar length — measure bar tip to base if you're unsure. Using the wrong chain means poor cutting, kickback risk, or chain ejection.
Yes — replace the spark plug every season before storage and again in spring. Most Ryobi chainsaws use a standard automotive spark plug (Champion or NGK equivalent); your manual or the spark plug cap will show the exact type. A fouled plug (black, wet, or gap worn) is the #1 reason a stored chainsaw won't start. A fresh plug costs $3 to $5 and takes 30 seconds to swap. Always use OEM or equivalent heat-range plugs for reliable ignition.


Ordering Ryobi chainsaw parts online is simple and helps you find genuine OEM parts for your unit. With same-day shipping on most in-stock items, you'll have your replacement part fast, minimizing downtime. Our model/part number lookup finds the exact OEM part for your unit, and every order is backed by our 365-day return policy and price-match guarantee. Browse our repair help section for troubleshooting tips, part testing guides, and step-by-step installation videos for your specific product.
On Ryobi chainsaws, check the powerhead housing near the rear handle for a label, stamped number, or molded identification marking. Depending on the model, you may also find it near the top of the saw body or around the fuel tank. Look for a combination of letters and numbers, then compare it with your owner's manual if the marking is hard to read. Enter that model number in the search bar to narrow the full Ryobi chainsaw parts catalog to parts made for your exact unit. This step covers every associated part, from the chain and bar to the carburetor, starter, filter, and ignition parts. It means fewer wrong orders and a faster repair.

The right online resources take the guesswork out of a Ryobi Chainsaw repair. Repair Clinic's diagnostic articles, part testing videos, exploded-view diagrams, and step-by-step written repair guides walk owners and technicians through each stage from symptom identification to final reassembly. Look up your model number to confirm the correct OEM part before you order.