Of the 3 saws in the picture, the Echo is the only one I still have. All 3 worked on the same jobs. You can see the degeneration in the plastics on the 660, but it had done a LOT of work by then. The 7901 was still quite new. Sadly I don't have pics, but it had holes like 10c coins in the clutch cover before it got much older.
I actually wash my saws after cutting palms, but on those 2, it didn't help. The Echo has light abrasions in the plastic around the chain brake on the inside of the clutch cover after 9+ years of the same work, but nothing like the 660 in the pic & definitely nothing like the 7901. I wouldn't know about Husqvarna, as I don't own any.
I cut Canary Island Date Palms & Washingtonia Palms quite regularly & they are the culprits. Maybe I'm expecting too much from the plastics?
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