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Echo Chainsaw Won't Start

The chainsaw small engine often has a separate model number. Use the small engine model number for a complete list of symptoms and parts. Watch our model # lookup video for help finding the model number.

CS-670/Serial: 03001001-03999999

The 5 most common part(s) or condition(s) which cause the symptom Chainsaw won't start are listed below starting with the most likely. Check or test each item and watch any available videos.

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Spark Plug - Part # 1863401 Mfg Part # 7321

Spark Plug

RepairClinic Item # 1863401 Aftermarket (Non-OEM) part

Every chainsaw relies on a spark plug to ignite the air-fuel mixture for proper combustion. Over time the electrode on the spark plug will burn away and the engine does not start. If the engine does not start, remove and inspect the spark plug. If there is any doubt that the plug is working properly replace it.

$2.60

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Spark Plug - Part # 1997308 Mfg Part # A426000010

Spark Plug

RepairClinic Item # 1997308

Every chainsaw relies on a spark plug to ignite the air-fuel mixture for proper combustion. Over time the electrode on the spark plug will burn away and the engine does not start. If the engine does not start, remove and inspect the spark plug. If there is any doubt that the plug is working properly replace it.

$0.90

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Carburetor

RepairClinic Item # 2264329

If the chainsaw won't start, the carburetor might be clogged or have bad fuel in the float bowl. If old fuel was left in the chainsaw for a long time some of the volatile ingredients may have evaporated, leaving a thicker, stickier product that is more like varnish or shellac. This sticky fuel can clog up the small jets and ports in the carburetor and it can be difficult to burn making it hard to start the engine. The only solution is to drain the old fuel from the float bowl and thoroughly clean the carburetor with carburetor cleaner. If that isn't effective, replace the entire carburetor.

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Ignition Coil - Part # 2253277 Mfg Part # 15660132632

Ignition Coil

RepairClinic Item # 2253277

If the chainsaw engine does not start the spark plug may not be getting voltage. Power to the spark plug is provided by the ignition coil. The ignition coil is mounted next to the flywheel. As the flywheel spins an electrical current is induced by the ignition coil. If the ignition coil is defective it will need to be replaced, it is not serviceable.

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Rewind Spring - Part # 2254486 Mfg Part # 17722002834

Rewind Spring

RepairClinic Item # 2254486

The recoil starter assembly has a rewind spring which spins the pulley backward to rewind the starter rope. If the rewind assembly is broken the rope will not rewind and the engine does not start.

$14.45

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