2-Cycle Tiller

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Sounds like the throttle cable is sticking or the carburetor butterfly is sticking.
Squirt some WD-40 into the cable that attaches to the throttle handle and onto the mechanism the cable hooks to at the carburetor. Carefully actuate the throttle and see if the mechanism is moving smoothly. It may need several squirts and some actuation before it become free.

How to Identify and Fix Common Gardening Problems ?

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One of the most common problems, especially because rototillers often sit unused for months, is stale fuel or a clogged carburetor. If you know you have fresh fuel, you can check for carburetor blockage by spraying a small amount of carb cleaner into the intake and attempting to start the engine.
Why would the engine only run while the choke is on or with repeated manual priming? An engine that requires the choking ( partial or full ) after initial engine warm up is an indication that the engine fuel air mixture system is out of adjustment.
If the wheels on your tiller move but the tines don`t spin, you may need to replace tine shaft clevis pins or replace the transmission. The tiller`s transmission drives the wheels and the tine shaft, so you`ll likely need to replace the transmission when the wheels spin but the tine shaft doesn`t move.
If the rotary tiller still doesn`t start:

Check that the fuel tank isn`t empty: if necessary, add fuel. The fuel must be fresh, of good quality and clean: make sure that no dirt, water or incompatible fuel (such as petrol-oil mixture, if the engine is a 4-stroke) gets into the tank.

When soil is dry and compacted, tiller tines basically bounce off it without digging into it or turning it. Combat compaction by watering the area thoroughly one or two days before you till. Also, raise the tines to their highest setting so they till just the top 1 or 2 inches of soil.
When your trimmer starts and runs on choke, it could be because the check valve in the gas cap is clogged. Start the trimmer and gently unscrew the gas cap halfway off. Turn the choke off and assess. If the engine is still running, that means the gas cap may be the culprit.
Dirty Air Filter

A clogged air filter restricts the amount of air that can go through to the engine. This can cause it to run lean enough to need the choke on to run. Check your air filter that it`s clean and properly installed.

Forward and reverse tine rotary tillers operate exactly as described. Forward rotating tines, like those on the RT3062, rotate forward on the shaft in the same direction the tractor is traveling. Reverse rotating tines, like those on the RT3062R, rotate on the shaft in the opposite direction the tractor is traveling.
After repeated use, the tines, or blades, dull and wear down. No matter what type or brand of tiller you own, these blades will need to be sharpened or replaced to keep your machine working properly.
IMPORTANT NOTE: Using an undersized cord, a larger number cord gauge (AWG) than recommended in the chart, will cause a loss in power and overheating of the tiller.
Tiller: Why does my tiller turn the soil poorly? Worn or damaged tines, broken tine shaft clevis pins, a worn drive belt, a faulty transmission, a problem with the clutch cable, improper depth-stake setting or bad soil conditions can cause a tiller to do a poor job turning the soil.
Tiller: Why won`t my tillers wheels or tines turn? A broken drive belt, bad transmission or problem with the clutch cable can prevent a tiller`s wheels and tines from turning. Check the drive belt and replace it if it`s worn or broken.
You should change your tiller oil at least every spring, but ideally after every 50 hours of operation. Between oil changes, check your oil level before each use to ensure there`s enough oil present. Small amounts of oil may burn off during use, so you may need to occasionally top it off.

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MDT Tiller starts and runs but tines won’t turn
ANSWER : -Won out drive or driven gears.

Good luck

Mai

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Tiller runs at full throddle and tines continue to turn. Unable to lower throddle. What do I do?
ANSWER : Sounds like the throttle cable is sticking or the carburetor butterfly is sticking.
Squirt some WD-40 into the cable that attaches to the throttle handle and onto the mechanism the cable hooks to at the carburetor. Carefully actuate the throttle and see if the mechanism is moving smoothly. It may need several squirts and some actuation before it become free.

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Tines wont turn
ANSWER : Without really knowing what is broken it will be tough to give a firm idea of the cost. However, you can head over to www.partstree.com. They have a great detailed parts break down and costs associated with it. Looked up your part numer and can find at this link: http://www.partstree.com/parts/?lc=mtd&mn=210-031-000+%281990%29

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Blades turn slow and dies out under load – Mantis 4-Cycle Tiller
ANSWER : TRY TAKING MUFLER SCREEN OUT OF MUFFLER AND RUNNING TILLER. SCREENS ARE BAD TO STOP UP.

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The gears have locked up what is the problelm
ANSWER : Is the motor running and increasing power with movement of the throttle lever? If so then something is possibly caught in the worm gear mechanism.

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MY TILLER HAS FULL POWER, BUT THE TINES ARE NOT TURNING WITH THE POWER THEY USUALLY DO. I VE CHECKED THE SPARK PLUG, CLEANED AIR FILTER, AND ADJUSTED THE CARB.
ANSWER : Watch this video.

http://www.alamia.us/mantis_parts_s/148.htm

If everything is fine then replace parts necessary – parts breakdown:

http://www.alamia.us/Mantis_Tiller_Parts_s/149.htm

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Will only run on full choke
ANSWER : You have a plugged jet inside the carb take it apart and clean them all

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Engine runs but tines dont turn – Mantis 2-Cycle Tiller
ANSWER : Bad clutch .

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