When to Replace a Chainsaw Guide Bar: Inspect Before You Buy
Replace a chainsaw guide bar when it is bent, cracked, badly heat-damaged, unable to support the chain squarely, or worn beyond the limits in the bar or saw manual. Clean it before judging it: packed residue, a blocked oil hole, or a removable burr can resemble terminal wear without making the bar scrap. Start with four outcomes, not one symptom A crooked cut, hot bar, unstable chain, or recurring derailment can point toward bar trouble, but none identifies the bar by itself. Cutter geometry, chain tension, lubrication, component mismatch, mounting, and sprocket wear can create similar evidence.
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