Why Choose the Echo CS-590 for Emerald Ash Borer Tree Removal?
The Echo CS-590 is a professional-grade chainsaw that excels in removing ash trees infested with the emerald ash borer (EAB). This saw delivers 59.8 cc of displacement and 4.2 horsepower, providing the torque needed to cut through dense, brittle ash wood that often develops internal decay. For homeowners and arborists in the United Kingdom, the Echo CS-590 offers a cost-effective solution at approximately £450–£550, allowing operators to manage EAB-stricken trees before they become hazardous. The saw’s G-Force Engine Air Pre-Cleaning system extends air filter life, critical when dealing with the fine dust and bark fragments common in infested ash.
Emerald ash borer infestations cause wood to become structurally weaker, increasing the risk of barberchairing or uncontrolled splitting during felling. The Echo CS-590’s i-30 start system and variable-speed trigger help the user maintain precise control, reducing kickback and ensuring safer cuts. Arborists report that this saw’s vibration-reducing handle design reduces fatigue during multiple cuts, essential for removing several affected trees in a single day. By using the Echo CS-590, tree care professionals can remove EAB-damaged ash efficiently while minimising risk to property and personnel.
What Are the Best Cutting Techniques for Ash Wood With EAB Damage?
Ash trees infested with emerald ash borer require specific cutting techniques to avoid accidents. Begin by assessing the tree for signs of wood decay, such as spongy bark, woodpecker holes, and vertical cracks. Use the Echo CS-590 to make a shallow notch cut on the side facing the intended fall direction, ensuring the notch opening is about one-third of the trunk diameter. Position the saw’s 50 cm (20 inch) bar to create a back cut slightly above the notch hinge, leaving uncut wood to guide the tree’s descent.
For heavily infested ash with brittle limbs, employ a three-step cut method. First, undercut the branch about 30 cm from the trunk to prevent binding. Second, make a top cut to remove the branch. Third, flush-cut the stub to the trunk using the Echo CS-590’s high-speed chain. Avoid cutting directly through decay pockets, as they can cause the chain to snag. Always wear a helmet, chaps, and hearing protection, as dry EAB wood can produce loud cracking sounds during felling. For stumps, refer to our Echo CS-590 Stump Grinding Tips for Smooth Removal guide for effective grinding after sawing.
Table: Cutting Speeds for Ash With Different Decay Levels
| Decay Level | Chain Type | Cut Depth per Pass (mm) | Time per Cut (seconds) | Chain Angle |
|---|---|---|---|---|
| No decay (healthy ash) | 59DL RSC3 | 30–40 | 8–12 | 0–5 degrees |
| Moderate decay (EAB active) | 59DL RSC3 | 20–30 | 12–18 | 5–10 degrees |
| Severe decay (hollowed ash) | 59DL RSC3 | 15–20 | 18–30 | 10–15 degrees |
| Brittle, dry ash | 59DL RG3 | 25–35 | 10–16 | 0–5 degrees |
How Does the Echo CS-590 Handle Ash Wood Compared to Other Saws?
The Echo CS-590 outperforms many mid-weight saws in ash removal due to its power-to-weight ratio of 3.1 kg/hp. The saw weighs 6.2 kg, lighter than competitors like the Stihl MS 362 (6.5 kg) while delivering comparable torque. With a chain speed of 10,000 RPM at full throttle, the CS-590 cuts through dry ash 15-20% faster than the Husqvarna 450 Rancher. The saw’s 3.1-barrel oil pump ensures consistent lubrication, reducing chain wear when cutting abrasive ash bark that often contains dirt and debris from EAB galleries.
For cost comparisons, the Echo CS-590 offers a lower price point than many European brands. A typical professional removal job for a medium ash tree costs £200–£400, while the saw itself can pay for itself after just two trees. Our detailed Echo CS-590 Cost Per Cut Analysis: Is It More Economical Than Hiring a Pro? shows a break-even point at around 10 trees for the average homeowner. The saw’s five-year consumer warranty and two-year commercial warranty add further value. The CS-590’s decompression valve also aids starting in cold conditions, useful for winter EAB removals when trees are dormant.
What Safety Precautions Are Essential When Removing EAB Ash?
Emerald ash borer infestations create unpredictable wood conditions. Always inspect the tree for broken branches, hanging limbs, and cracked trunks before cutting. Use the Echo CS-590’s chain brake frequently, especially when moving between cut positions. Ensure the saw’s chain tension is correct—too loose increases kickback risk; too tight damages the bar. The CS-590’s captive bar nut system prevents loosening during operation, a key feature when cutting vibration-prone brittle wood.
Wear full personal protective equipment including a forestry helmet with face shield, chainsaw chaps, steel-toe boots, and gloves. For large ash trees over 50 cm diameter, consider rope-assisted felling techniques to guide the fall direction. Never cut alone—have a spotter standing at least two tree lengths away. Clear the drop zone of debris and limbs. For icy conditions, see our guide on Echo CS-590: Winter Oak Removal Techniques for Icy Conditions, which applies similar principles for winter EAB ash. After felling, immediately debark the stump to prevent EAB spread.
How to Maintain the Echo CS-590 for Ash Wood Cutting?
Regular maintenance ensures the Echo CS-590 performs optimally on EAB-affected ash. Clean the air filter after every tank of fuel, as ash dust clogs filters faster than other wood types. Use a nylon brush to remove debris from the cooling fins and recoil starter housing. The CS-590’s dual-post chain adjuster simplifies tensioning; check it after every five cuts on brittle ash. Replace the spark plug annually—the BPMR7A works best for consistent ignition.
Sharpen the chain every 1-2 hours of cutting time, or sooner if cutting through dirt-embedded bark. Use a 5/32-inch round file at a 30-degree angle for the 59DL chain. Adjust the oiler to maximum flow when cutting dry ash to prevent bar overheating. Store the saw in a dry shed, with fuel stabiliser added to the petrol if not used within 30 days. For specific guidance on resinous woods, refer to Echo CS-590: Pine Tree Removal Techniques for Resinous Wood for chain cleaning methods.
What Do Owners Say About the Echo CS-590 for Ash Removal?
Users consistently praise the Echo CS-590 for its reliability and power on EAB-infested ash. A survey of 120 UK arborists found that 89% rated its cutting speed as “excellent” for dying ash. One user notes: “The CS-590 ate through a 60 cm EAB ash without bogging down—my Stihl 250 would have stalled twice.” Another mentions: “The pre-air filter saved me from frequent cleaning; the sawdust from dry ash is brutal on standard filters.”
Negative feedback includes the weight (some operators prefer lighter saws for limbing), and the chain tensioner can loosen if not tightened fully. However, 94% of respondents said they would recommend the CS-590 for ash removal over similarly priced competitors. For post-storm work, our guide on Echo CS-590: Removing Palm Trees Safely After a Storm shows versatility. The saw’s value-for-money rating averages 4.7 out of 5 stars across online forums.
Frequently Asked Questions
1. Can the Echo CS-590 cut through large ash trees over 100 cm diameter?
Yes, but it requires multiple bore cuts and careful planning. The 50 cm bar allows penetration of up to 80 cm in one pass. For larger trunks, use a plunge cut in stages.
2. What chain oil is best for EAB ash?
Use a biodegradable vegetable-based bar oil (ISO 100 grade) to reduce environmental impact. Standard mineral oil works but may cause environmental concerns if spills occur.
3. How long does the Echo CS-590 last for frequent ash removal?
With proper maintenance, expect 5–8 years of heavy professional use or 10+ years for homeowners. Common repairs include replacing the oiler and spark plug.
4. Is the Echo CS-590 suitable for storm-damaged ash?
Yes, its high torque handles tangled limbs. Use a shorter bar (45 cm) for storm debris to reduce kickback. See our storm safety guide for more details.
5. What fuel mix ratio works best?
Use a 50:1 fuel mix of premium unleaded (95+ octane) and Echo Power Blend XT synthetic oil. Do not use ethanol blends above 10%.
6. Can I rent an Echo CS-590 instead of buying?
Yes, many UK hire shops rent them for £35–£50 per day. For frequent ash removals, buying is more economical per use.
