What Is the Echo 620P’s 59.8cc Engine? (Displacement Specs)
The ECHO CS-620P’s 59.8 cc rating is its engine displacement: the volume swept by the piston inside its single cylinder. It is not the fuel-tank capacity or a power rating. The saw has an air-cooled, two-stroke gasoline engine. Understanding displacement helps you identify the engine, but it does not by itself tell you which bar, chain, or cutting task is suitable.
Think of displacement as a measurement of the space a piston moves through, not a measure of how much fuel the saw holds. When I explain engine specs, I start with that distinction because “cc” can sound like a capacity figure for a tank. On the CS-620P, it describes the engine’s working volume.
What does 59.8 cc mean on the ECHO CS-620P?
The 59.8 cc figure is the engine’s displacement, also called swept volume. It measures the space the piston travels through in the cylinder as it moves from its lowest point to its highest point. The CS-620P has one cylinder, so its total displacement is the swept volume of that cylinder.
“CC” means cubic centimeters. The engine’s 59.8 cc displacement is equal to 0.0598 liters, or about 3.65 cubic inches. Those conversions describe the same volume in different units; they do not indicate fuel capacity or cutting output.
A piston moves up and down inside the cylinder. The volume it sweeps between its bottom and top positions is the displacement. The combustion chamber above the piston is not included in that swept-volume number.
| Figure | What it describes |
|---|---|
| 59.8 cc | Combined swept volume of the engine’s cylinder |
| 0.0598 L | The same displacement in liters |
| About 3.65 cu in | The same displacement in cubic inches |
| Fuel-tank capacity | A separate specification; not given by 59.8 cc |
| Engine power | A separate measure; not given by displacement alone |
The key point is simple: “59.8 cc” identifies the size of the engine’s swept volume. It is not a promise of a certain cutting speed or a guide to how much fuel to pour in.
What kind of engine does the CS-620P use?
The CS-620P is specified with a single-cylinder, air-cooled, two-stroke gasoline engine. These terms describe the engine’s layout and operating cycle. They help explain what the displacement figure refers to, and why the saw needs the correct gasoline-and-oil mix.
A two-stroke engine completes its operating cycle in two piston strokes, with fuel and air moving through the engine in a way set by its design. Unlike a four-stroke engine that uses a separate oil supply for lubrication, this saw requires two-stroke oil mixed with gasoline at the ratio specified by ECHO.
Air-cooled means the engine sheds heat to the surrounding air rather than using a liquid-cooling system. Keep cooling areas and the air-filter area clean as directed in the operator’s manual. Debris or poor maintenance can interfere with normal operation.
The specified fuel mix is 50 parts gasoline to 1 part two-stroke oil, using oil that meets the manual’s requirements. Measure carefully and follow the manual’s fuel instructions. Do not use straight gasoline in this two-stroke engine: the wrong mixture can deprive engine parts of needed lubrication and cause severe damage.
Does 59.8 cc tell me how powerful the saw is?
Displacement describes engine volume, not power by itself. Engine design, tuning, condition, and operating load also affect how an engine performs. So the CS-620P’s 59.8 cc specification is useful for identifying its engine, but it cannot tell you the exact cutting speed or what size wood is safe to cut.
A larger displacement does not automatically make one saw the right choice for every job. Nor does the number establish a safe guide-bar length. Use the model’s specifications and approved combinations rather than choosing parts based on cc alone.
| Number or term | What you can conclude | What you cannot conclude from it alone |
|---|---|---|
| 59.8 cc | The engine’s swept volume | Exact power, cutting speed, or suitable tree size |
| 20-inch bar | The bar’s stated length, if that is the saw’s configuration | That every 20-inch bar or chain will fit |
| 3/8-inch pitch | A common chain-size marking for this model | That the installed chain has the correct gauge or link count |
| 2,800 rpm idle | Approximate specified idle speed | The correct maximum speed or a safe tuning setting |
If you are comparing saws, check each model’s full specification sheet and intended use. Displacement is one useful data point, not a substitute for the rest of the specifications.
Which bar and chain fit a CS-620P?
Bar and chain compatibility depends on the saw’s approved configuration, not just its 59.8 cc engine. Many CS-620P setups use a 20-inch guide bar and a chain with 3/8-inch pitch and .050-inch gauge, but configurations can vary. Check the saw’s manual and the markings on your actual bar and chain before buying replacements.
Pitch is the spacing used to describe the chain’s drive links and the bar’s sprocket system. Gauge is the thickness of the chain’s drive links, which must fit the bar groove. The drive-link count is the number of links that run inside that groove. All three details matter when matching a replacement chain.
Before ordering, check:
- The guide bar’s identification and length.
- The chain pitch and gauge markings.
- The required drive-link count.
- ECHO’s approved bar and chain combinations for your saw and market.
A longer bar increases the demands on the saw and changes how you handle it. Do not choose a bar by relying only on engine displacement, or on wood species or hardness alone. Confirm that the complete bar-and-chain setup is approved for your specific CS-620P.
What engine-speed figures matter?
The CS-620P’s approximate idle specification is 2,800 rpm. Idle speed is how fast the engine runs when you are not pressing the throttle. At idle, the chain should remain stopped; if it moves, stop using the saw and follow the manual’s troubleshooting instructions or consult a qualified service provider.
The maximum engine-speed limit is a separate figure. Use the exact value in the manual for your model and configuration. If the manual calls for tachometer tuning, use the specified method and limit. Do not tune the engine by ear or exceed the stated maximum speed, since incorrect tuning can damage the saw or make it unsafe.
For an owner, these figures are reference points, not a reason to adjust the carburetor without the right instructions and tools. If the saw idles poorly, runs unusually, or the chain moves at idle, shut it down and investigate before cutting again.
What should I check before using the saw?
The displacement number does not make a saw safe by itself. Before starting, check the saw’s safety parts, cutting equipment, fuel, and work area. Follow the operator’s manual and applicable safety rules. Wear chainsaw-rated leg protection, a helmet, eye and face protection, hearing protection, gloves, and suitable boots.
On a stable surface, inspect the chain brake, throttle lockout, chain catcher, bar, chain tension, fasteners, and controls. Check for damage and make sure the chain is properly tensioned. Use fresh, correctly mixed fuel and the required bar-and-chain oil.
Start the saw on stable ground with the chain brake engaged, following the manual’s cold- or warm-start procedure. Confirm the chain stays still at idle. For cutting, use a sharp chain, a stable stance, and a secure two-handed grip. Keep the bar nose clear of unintended contact and do not cut above shoulder height.
The upper tip area of the guide bar can cause rotational kickback if it contacts wood or another object. The saw can move rapidly back toward the operator. Keep that area clear; do not rely on the chain brake as a replacement for safe technique. Felling or other higher-risk work requires task-appropriate training and a site assessment. Engine displacement does not assess a tree or worksite.
How should I maintain and store the engine?
Routine care helps the engine and cutting equipment work as intended. Follow the manual’s maintenance schedule, use the specified fuel mix, and stop to inspect a chain that is dull, damaged, or incorrectly tensioned. Do not force a dull chain through wood.
After shutting down, engage the brake, switch off the engine, and let it cool. Clean the powerhead and the bar groove and oil ports as directed. Check the air-filter area, chain condition, and tension before storage or the next use. Avoid working on a hot engine.
When the chain cuts poorly, inspect it rather than pressing harder. Sharpen or replace it as needed, then check its condition and tension before restarting. If the engine needs tuning or a repair beyond the manual’s owner-service steps, use a qualified service provider.
Frequently asked questions
Is 59.8 cc the CS-620P’s fuel-tank capacity?
No. It is the engine’s displacement, meaning the swept volume of its cylinder. Fuel-tank capacity is a separate specification.
Is the ECHO CS-620P a two-stroke chainsaw?
Yes. Its specified engine is a single-cylinder, air-cooled, two-stroke gasoline engine. Use the fuel mixture and oil required by the operator’s manual.
How much is 59.8 cc in liters?
It is 0.0598 liters. This is a unit conversion for engine displacement, not the amount of fuel the saw holds.
Does 59.8 cc mean the saw has a certain horsepower?
No. Displacement alone does not establish engine power. Check ECHO’s model specifications for any stated power figure.
What fuel mix does the CS-620P require?
The specified ratio is 50:1 gasoline to two-stroke oil that meets the operator’s manual requirements. Measure accurately, and do not run straight gasoline in the two-stroke engine.
Does every CS-620P use a 20-inch bar?
No. A 20-inch bar is a common configuration, but setups can vary by market and equipment. Check the saw’s manual and bar identification.
What chain size is common on the CS-620P?
A common configuration is 3/8-inch pitch and .050-inch gauge. Verify the installed bar and chain markings and the required drive-link count before buying a replacement.
What is the CS-620P’s idle speed?
The approximate idle specification is 2,800 rpm. Consult the manual for the exact specification, and stop using the saw if the chain moves at idle.
Can I choose a longer bar because the engine is 59.8 cc?
Not based on displacement alone. Use only bar-and-chain combinations approved for your specific saw. A longer bar increases cutting demands.
Does the chain brake prevent kickback?
The brake is a safety feature, but it does not replace safe handling. Keep the bar nose clear of unintended contact and follow the manual’s safety instructions.
(This article was written by one of our staff writers, Evan Bradley. Visit our Meet the Team page.)
