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Snapper mower won't change speed

17 years ago

I have a Snapper 21" walk behind mulching mower. Normally I mow at the fastest speed setting. Lately I tried to change speeds and noticed the speed is the same no matter how I set the speed select lever.

I noticed the Driven Disc was not moving back and forth as I tried to change speeds. I removed the connector hex nut and tried to manually move the Driven Disc along the hex shaft. It wouldn't budge, even after hitting it with a rubber mallet.

Any ideas what to try next? Thanks,

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Comments (2)

Greg Goyeneche
17 years ago
You let the hex shaft corrode over time, causing the disc to stick in place.

Polish the hex shaft with steel wool or fine abrasive cloth, then us some penetrating lube (like PB Blaster) to try to loosen up the disc. When you finally get it to move, polish the area on the hex where the disc first was, relube lightly, and you should be good to go.

You want a light film on the hex to prevent future rust, but no enough to attract dust and dirt.
rmtx
Original Author
17 years ago
I'll try that, thanks!
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