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The following was extracted from the Mantis owners manual..
At some point, you may find that the tines won't turn when you press the throttle. This may mean the engine isn't sitting all the way down on the worm gear housing. Perhaps you've been using your Tiller
for several years. Or perhaps you've removed the engine for use with the Mantis hedge trimmer attachment, then replaced it. In either case, the flange bolt may have come loose and lifted the engine up.
If this happened you'll notice a gap between the bottom of the engine clutch case and the top of the worm gear housing.
To fix this, loosen the flange bolt. Take the engine off the worm gear housing. Notice the hex head on top of the drive shaft . Inside the clutch case, you'll find the clutch drum. Make sure the hex head
lines up with the clutch drum inside the clutch case. Then put the engine back on the worm gear housing. Make sure the plastic carrying handle is not under the fuel tank. If you've followed these steps properly, there will be no gap between the clutch case and the worm gear housing. Make sure you tighten the flange bolt.
you will have to tear down the unit and check it for stripped out gears, chains and sprockets.you may have to change out the unit as a whole assembly.i don't recomend putting a new chain on a worn sprocket as it will wear out the chain quickly. hope this helps.
PPB2000 more than likely has stripped a gear in the gearbox. The drive cable is probably ok. Tines are driven by a worm gear and brass gear. Internal parts of gear box not available.
jas
You will probably need to replace the worm gear and any other worn parts in the gearbox. Check your owners manual for part numbers. If extensive repair is needed and your machine is several years old you may be better off with the Mantis trade in program for a new tiller. I found this to be the case with my own tiller last year. Call or go to www.mantis.com.
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