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Device repair and assembly guides for the 2016 Mantis XP Tiller, model 7990.

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Tines not turning after replace worm gear in transmission

I changed the worm gear because the tines ony tiller stop spinning. After replacing the worm gear it still not turning.

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Thank you for the information, I will check the clutch and also the woodruff key.

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First, make sure the engine (really the clutch housing) is seated all the way down onto the transmission. It’s not very likely this is the problem, I’ve never seen these go loose (usually it’s an assembly problem), but it might be possible.

Another possibility us that the clutch is not working. If the tines stopped moving somewhat gradually, slowing even though the engine speed remained unchanged, it would be the clutch. If it was instantaneous — which you would have noticed if you were tilling — the woodruff key on the crankshaft has sheared.

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