Mantis

It's not the on off switch. How do I check the coil ?
Experienced gardeners share their insights in answering this question :
Hidsmith536
To make sure you are getting spark at the spark plug, to do this:Remove your spark plug and check to be sure you are getting a bright blue spark at the spark plug.You do this by grounding the plug on the head of the engine and pulling the crank rope…watching the plug for spark.If you are getting a nice blue spark then skip A below and go to B.
A…If you do not get a nice blue spark then you may need to replace the electronic module.Note: If you have to replace the module be sure to measure the position it is in and be sure to install it in the same position Normally the clearance is around .10 thousandsandsAlso write the measurement down on a piece of paper for later reference, this measurement is critical to starting of the engine later.
B…Also take some fine grit sandpaper (not emery) and lightly sand the flywheel where the magnet is located to clean any rust or corrosion from the magnet area.You can also try to lightly sand the module metal face to increase the possibility of ignition of the old module before replacement.
*****************************************************************************************************************************************************************Sounds like you have dirt/debris in your caburetor jets,fuel passages or a diaphgram that is becoming non-flexible. Check/Clean/Replace your Air Filter, a dirty air filter can make your engine run to rich with fuel.Also be sure to check and clean your spark arrestor in the exaust,if you have one installed on your engine.
Note: ALWAYS USE COMPRESSED AIR TO CLEAN YOUR JETS AND PASSAGES, VERY IMPORTANT.
Note:Before you disassemble the carburetor:Write down on a piece of paper or take a picture of how the linkage attaches to your carburetor for later reference when you go to reinstall your carburetor.Mark each piece with a awl, or some kind of instrument that will make an alignment scratch before you disassemble the carburetor into separate pieces.That way you will know which way it goes back together when you reassemble it.
Sometimes you can get by with priming the carburetor or by using a very small shot of starting fluid and letting it run a few times like that, and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.Be sure to check your fuel tank for water and dirt/debris, if there is water/debris then you need to clean your tank.Check you fuel line condition after a while they will degrade and need replacment.
Check/Clean/Replace your fuel filter if you have one, normally they are located in the fuel tank of chainsaws and weedeaters.When you remove your fuel lines from the carburetor be sure to make a drawing to how the lines are connected to the carburetor or take a pictue for later reference.Normally the big line will be the line the fuel filter is connected to inside of the tank.The smaller of the two lines is the return to the fuel tank from the carburetor after it is pumped thru the carburetor by the primer bulb.Make sure you are using fresh fuel…and oil if your using a two cycle chainsaw or weedeater with the oil to the right mixture…too much oil as it can cause hard starting and excessive smoking.If the chainsaw/trimmer is over a couple of years old, then I recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.The diaphgram may look good and flexible, but it can be deceiving and not act as a fuel pump as it should because it has become too hard and will cause hard starting,start and run and shut off, etc.
When you clean your carburetor, I recommend that you use a laquer thinner type cleaner to clean and dissolve the laquer build-up in the float and needle jet passages.Be sure to remove all plastic and rubber parts before using the laquer thinner because it can dissolve the plastic parts and render them unuseable.Be sure to use COMPRESSED AIR to blow out all the fuel and air passages.The higher air pressure is needed to blow some of the trash/debris from the fuel or air passages.Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.Keep in mind that the float (if you have one) for the carburetor must be level when you go to reassemble the carburetor or follow the instructions you get with the carburetor kit, or you could also ask the parts man that you get your kit from.When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws.But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position.Be sure to mark the turns down on a piece of paper.That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their original position before you started.Note:The little spring inside of the carburetor goes under the float arm.That is where your fuel inlet needle/float valve is located…on the arm at the end.Normally there is a small indention in the carburetor base and a small protrusion on the underneath of the float arm where the spring will be in the right postion for installation.The spring will set in the indention and you will install the float arm with the needle/float valve and float rod into position over top of the spring,you will push down until it is in position and then you can tighten the screw that holds the float arm assembly in position.Once you have your carburetor cleaned/rebuilt that should solve your problem.Please take time to rate me Bud

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

If there is no spark, this indicates that the spark plug is defective and should be replaced.
The plug will depend on the SV number on your engine; the gap will be the same for each engine – . 024-. 028.
Once the fuel tank is empty, push the primer bulb on your tiller 7 or 8 times to clear out any fuel in the carburetor.
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.
Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. This includes worn, fouled or damaged spark plugs, bad plug wires or a cracked distributor cap.
If no spark appears, check for broken wires, shorts, grounds or a defective stop switch. Once you have confirmed that the stop switch is working, reconnect the spark plug lead.
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.
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.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Where is the spark plug located won't start – Mantis 4-Cycle Tiller
ANSWER : Try looking for the plug wire and follow it in. Should be coming out of the flywheel shroud on top of the engine. Good luck.

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My Mantis Tiller won’t start and there is grinding type noise when I try and start it. I recently did some very lengthy trench digging over a period of about 2 months.
ANSWER : It sounds like the clutch springs may be overheated and the clutch shoes rub while you try to start it.If you loosten the screw that holds the engine to the gear box you can try to start it without the clutch and see if that is it.Good luck

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Wont start flooding – Mantis Tiller
ANSWER : Iwould start out by checking to make sure you have spark. If you do you likley have a fuel problem. have you ever replaced the carbureator or had it rebuilt?

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My mantis tiller 2cycle: Iput new spark plug the on&off switch ok just not getting a spark to the plug. Think its the coil ?
ANSWER : I would say it is the coil, if you have a multimeter you can connect it to the coil and try to start it to see if it producing voltage. Hope this helps Tim

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Mantis tiller idle screw adjustment – Mantis 2-Cycle Tiller
ANSWER : Start out with 1.5 turns on High speed jdet and 1/2 turn on the low speed. Make sure plug is not wet, better yet install a new one. Clean, fresh fuel and give it a pull.

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Mantis-20 will not start – have tried new fuel?
ANSWER : Hi, chances are the old fuel has gone bad and caused the spark plug to get muck on it, i would go out and buy a new spark plug then leave the plug out but fitted to the ht lead, then rest the plug on a metal part of the engine then try stating it and make sure you have a good strong spark between the gap in the plug, if you have a good spark then take the plug out the ht lead but also leave it out the engine, then keep pulling the starter for about 20 to 30 seconds to ensure you have only the new fuel coming through into the combustion chamber, you should be able to smell the fuel after few seconds, then put the spark plug back in and try starting it, you should find it will now start.let me know how you get on or if you need further assistance ok

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Mantis tiller will not start. Cannot get primer bulb to draw fuel.I replaced all of the lines,primer bulb still won’t work. Tiller will start by priming cylinder by removing spark plug. Help?
ANSWER : Make sure there are no leaks in the bulb. Did you reattach the fuel lijnes correctly? You should feel resistance after pushing 3 or 4 times to ensure fuel is getting to the carb. If necessary replace the bulb. Otherwise check with Mantis at www.mantis.com or give them a call for troubleshooting assistance.

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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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