2-Cycle Tiller
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When the engine and carb were new, the factory settings were 1 1/4 turns out. As fuel deposits form and things wear, it is normal to need occasional adjustment. If the adjustments need to go more than 2 1/2 turns out, or if the adjustments seem to need constant change, then the carb needs to be overhauled. Here in the USA, many areas use gas that is 10% alcohol. The alcohol effects the soft parts in the carb and will often cause hardening of the diaphragm. If/when you overhaul the carb, also replace the fuel lines and tank grommet.Good Luck!
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What is the gas to oil ratio for Mantis 2-cycle engines? Always make sure you use the proper 50:1 mixture ratio; that is 2.6 ounces of oil to 1 gallon of 89 octane or higher gasoline. If your engine is getting hot, you may not have enough oil in your gas mixture to properly lubricate the engine.
Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the engine to stall. If the carburetor is clogged, try cleaning it with carburetor cleaner.
Adjusting the Idle Speed and Mixture
On some float-type carburettors, you can adjust the air-fuel mixture and engine speed at idle. Check for an idle speed screw designed to keep the throttle plate from closing completely, and an idle mixture screw that limits the flow of fuel at idle.
This method involves looking at the base of the spark plug insulator (white part of the plug) for a slight coloring on the insulator just above where the insulator comes through the steel case. If the mixture is too lean, it will leave no color, while a rich mixture will cause the fuel ring to become more prominent.
Q: How Do I Know if My Carburetor Needs Adjusting? A: Simply put, poor running conditions are a dead giveaway. A rough idle, poor throttle response, and excessive fuel consumption are all signs to look for. If the carburetor was sitting for some time or hasn`t been serviced in a while, you may need to clean it first.
Use a 32:1 gasoline to oil ratio. One gallon of gasoline combined with 4 oz of two-cycle engine oil.
Find the adjustment screws on the front of the carburetor.
There should be two screws on the front of the carburetor, which are used to adjust the air and fuel mixture. These often look like flat-head screws, and you can use a screwdriver to turn them, adjusting the amount of fuel and air mixing in the carb.
Discover Relevant Questions and Answers for Your Specific Issue
the most relevant questions and answers related to your specific issue
No color on the carb adjustment screws?
ANSWER : Look for H and L cast on carb. body near screws
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.
Mantis starts fine then when it warms up it stalls when you pull the throttle. Is it the carb clogged up, or do you have any sugestions?? I have replaced the gas and oil??
ANSWER : Hello. the carb is partially clogged. do this. get a bottle of carb cleaner to add to the fuel. follow the instructions on the bottle regarding the amount.
also get an aerosol can of starting fluid and a helper. start it up and have the helper spray starter fluid into the air intake as you pull the throttle. continue until the clog is cleared. joe
When I Start Mantis Tilleer it starts in gear ( tines are turning)
ANSWER : The Mantis has a speed controlled automatic clutch.
Lower the idle speed by turning the idle screw counter clockwise. The idle screw is attached where the throttle cable meet the carb. The screw has a pointed end that resembles a pencil point.
The engine speed should be adjusted just above stalling.
If the tines turn even when the engine pull rope is pulled, the the clutch is defective and needs repairing.
j
I have a two cylinder Mantis tiller. It has locked up and the cord is locked. I am unable to pull the cord. Any suggestions? I was in the process of using the tiller when it felt as if it were running out of gas. It stopped on its own, and then it was locked up and I was unable to pull the cord.
ANSWER : Check the oil, if not full fill it, take the shroud off, should be for bolts, fit a socket on it with a breaker bar or ratchet and turn it a few times, then reassemble and start. Hope this helped Tim
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?
My mantis tiller starts but there is no input to the tines, what could be the problem?
ANSWER : Here is the parts breakdown. You should be able to fix it yourself.
http://www.alamia.us/Mantis_Tiller_Parts_s/149.htm
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.
