Question about Mantis 2-Cycle Tiller

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Mantis tiller choke out with choke off

Starts and idles but when the choke is disengaged the engine shuts off.
Replaced all carburetor seals, gaskets, and diaphrams. Replace fuel hoses and fuel and fuel filter, Also checked and clean exhaust system. Has new spark plug. Engine stalls if it is accelerated too far above idle. Cannot get full power. Vent Fuel filter is clear and clean. Tried to adjust (per manual) the idle screws in the carburetor but the motor still stalls when accelerated or the choke is pushes in. Tines are seated and turning properly. Even took off carburetor and blew out ports and valves.

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  • Kelly
    Kelly May 11, 2010

    This sounds like the problem many not be the carb, however. Which engine is it? 22 CC honda 2 stroke or 4 stroke ? There are several engines 22, 33, 49 cc I don't really want to discuss each one of them and what could bre causing the problem. f almost sounds as if your float needle is sticking in the carb. The float needle would be on top of the diaphram, If you would... Please pass your engine model number so someone can better assist you. Kelly

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6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Honda GX25 HG110 mini tiller, tines won't turn.

Mine did the same thing....two things to check: 1) air cleaner, make sure that it is clean 2). gas filter in the gas tank. Take a short piece of wire and fish the black line out. On the end is a small fuel filter. After I flushed mine fuel filter out it ran fine.

Mark

Posted on Jun 01, 2009

  • 15 Answers

SOURCE: Engine runs fine on 2-cycle Mantis tiller, but

Your problem is a common one on Mantis tillers. The engine sounds like it is not breathing properly. I have fixed dozens of these problems and it is almost always the spark arrestor clogged up. The spark arrestor is found inside a small housing on the muffler (easy to fix). There are 3 screws that need to be removed to get the muffler cover off, then you will see a small housing a little over an inch long with another 3 screws...remove them and you will see a small screen that is probably clogged. Clean it and the housing with a solvent (I usually use carb cleaner) then re-install the arrestor and reassemble the muffler cover. This will fix your problem about 80% of the time.

If that is not the problem you may need to fix the carburetor (take my advice and just buy a new one...not much more expensive than the repair kit and a lot simpler.

Posted on Jun 14, 2009

wolfwizard11
  • 5 Answers

SOURCE: MANTIS WILL NOT IDLE

I had the same problem. I adjusted the throttle stop IN until I got an idle without touching the throttle.

Posted on Aug 04, 2009

lindsay836
  • 677 Answers

SOURCE: Mantis tiller 2 cycle will not accelerate. idles

I would pull the tines off of the transmission. You probably have some debris wrapped around the transmission drive shaft(s).
Please let me know.

Posted on Feb 08, 2010

  • 221 Answers

SOURCE: mtd rear tines tiller won't engage tines. F and R

It sounds like the shift shaft or something in the gearbox the shift shaft engages. I know you didn't want to hear this but it is not uncommon. Most operators don't use the clutch bail when starting, stopping, and shifting as they should.

I hate to say it but this may require a trip to your service center for repair.

Posted on Apr 30, 2010

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