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How to start a push mower after it has been turned over for service

When placing any small engine on it's side, always make sure that the carburetor/air filter is pointing up.
Turn off the fuel before service, if the unit has a shut-off valve.
If the unit has been turned over with the carburetor and air filter down, you now have extra fuel that has flooded and filled the intake manifold, engine crankcase oil has saturated the air filter, and it will not start.
How to remove the extra fuel ?
1) Remove the air filter for the moment.
a) Check to see if the air filter is saturated with oil: if it is, you will need to replace it.
2) Check the spark plug, and dry any excess liquids, reinstall.
3) If you have a manual choke lever: leave it in the run position.
4) When you remove the air filter, you may have extra oil and fuel spilling onto the platform of the equipment. Clean any excess with a rag.
5) With no choke, pull the recoil rope as if you were trying to start x6 pulls.
You will notice white smoke coming from the muffler, again clean any spill of excess liquids.
6) Continue to pull, and as you do, your engine will start to run, lots of white smoke will come from the muffler.
7) Allow the engine to run until all of the white smoke clears.
8) Turn off the engine, reinstall air filter, clean any excess liquid from the engine platform.
9) Start the engine again, you should be ready to go to work.

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my cub cadet sc 100 won't start after putting it on it's side to sharpen blade.


Since you put it on its side, you most likely dumped all the oil from the crank area to the cylinder and carburetor. What you need to do is check engine oil to be sure it is full. Then take air filter off, clean the carburetor with carb cleaner. Remove spark plug, clean spark plug with carb cleaner. Pull the cord about a dozen times WITH THE SPARK Plug removed. Then install spark plug and try to start.

Feb 15, 2017 | Cub Cadet Garden

1 Answer

Why won't it fire up?


lawn mower trouble shooting, no start
First check the air filter. Is it getting air and gas? If not lets find out why.
1. Air Filters; There are 2 types. One is made of paper and the other is made of foam. NOTE: (Whenever you lift your lawnmower for any reason disconnect your spark plug and ground it.) NOTE: Do not run your engine or any engine without the air filter, it will RUIN the motor. When lifting your lawnmower on its side, always lift it with the carburetor up. A little oil Will come out, but not enough to hurt anything. If you lift your lawnmower with the carburetor down oil & gas will go everywhere. If your air filter is made of paper the oil & gas will ruin it. If not you will have to clean your foam one.
a. Paper filters cannot be cleaned with gas or any solvent, you can only use compressed air to blow the dirt out. If it's very dirty, it's best to replace.
b. Foam filters can be cleaned with dish washing liquid and water and dried with a rag. Then very liberally, work new engine oil throughout the air filter and squeeze out excess. The oil in the filter is what traps the dirt. If your foam filter is deteriorating or coming apart replace it, it can ruin your engine. Clean every 25 hours under normal conditions. Note: Use the same type of engine oil you use in your small engine to lightly oil your filter.2. Check your gas cap. The gas cap is a source of ventilation for the fuel tank. If your gas cap is clogged it will make your fuel tank vapor lock, and you will have no gas flow. To check and see if the gas cap is bad, loosen the gas cap and see if it will run longer than before you loosened the gas cap. If it continues running, you need to replace the cap, if it does not continue running check further in this troubleshooting guide for more information.
3. Is the fuel line clogged or partially clogged? Example: when you disconnect the fuel line from the carburetor and the gas is steadily flowing there is not a problem. But if it only drips with a full tank of gas replace it after checking the gas cap.
4. Do you have a fuel cut off? If so, is it cut on?
5. Do you have a gas filter? If so is it clear? If not, replace it.
6. Is the gas flowing in to the carburetor? If not you could have a piece of trash in the needle & seat. The needle & seat controls the gas flow that starts & stops the gas. You will have to clean or replace. It's best to replace.
7. The float controls the gas level in the carburetor. If any of these signs occur, the carburetor is overflowing out of your air filter or out of your primer. If you have gas in your oil, you have carburetor problems. NOTE: Drain the oil if there is gas in it, if you don't it can be dangerous. You need to check the needle & seat to see if it has trash or is bad. Is your float bad? To check the float pull the pin that holds your float in place, shake the float and if there is fluid inside of the float, replace it. Don't forget to set the float level.
8. Carburetors with primers represent a large majority of lawnmower and small engines today. They have primers to push or force air in the carburetor and in turn force gas through the center jet to make starting easier. Then look to see if the primer is pumping gas in to the engine.

9. Things to check for if the primer is not working. This applies to several different types of engines. Check for holes or tears if you have a carburetor that has a diaphragm. (A diaphragm is a gas pump located in carburetors that have the gas tank and carburetors assembled together.) Replace the diaphragm if the diaphragm has a hole or has hardened or slightly slid over to one side, or if the engine will not run correctly and is skipping, not priming, or will not run at all. If you have a float type carburetor, the bowl gasket Will not be sealed properly and air will leak past the bowl gasket and will not prime. If you have a air assembly primer box where the air filter box is connected to carburetor, your gasket Will not be sealing correctly. If there is a tear or a hole in the gasket, air will leak past it and will not force air in the carburetor which will not force gas through the center jet. Also your air assembly box Will have a crack and will be warped because it was over tightened. If so, replace it.
10. Some models have chokes. Chokes are used to draw gas through the center jet to run. If the choke is not working properly and it is not closing all the way the engine cannot draw gas through the center jet and will not crank.

11. The throttle cable is what operates the choke on some models and the primer on some others, but it works the speed of the engine. To adjust the throttle that works the choke you need to loosen the throttle and open the throttle all the way, then push it until the choke is closed all the way. To adjust a "speed only" open the throttle all the way and make sure that the engine speed will be all the way open and then tighten the cable back up on the engine. Make sure if you have a kill switch on the throttle cable, that it works when you lower the speed all the way. If not, adjust again. Carburetors: Carburetors are the cause of 99% of all small engine problems. Carburetors are the easiest thing to repair on small engines.

We have videos to that will help you in the repair of your Lawn Mower and Small Engine

Section 2 Troubleshooting safety switch system
1. Spark. There are several things that would keep a lawnmower or small engine from sparking like the safety switches. Lawnmowers and small engines have several different locations where the safety switches Will be. If your lawnmower or small engine doesn't spark you need to get your owner's manual and find out where your safety switches are and then try to trace the problem.
2. Oil sensor. If you have one ... The oil sensor will make your lawnmower or small engine quit running until you fill it with oil to the "full level." This will cause the engine not to spark because of the oil being low. NOTE: This is a safety feature to protect your engine from running out of oil.
3. Stop cable or blade brake. This cable is connected to the handle bar and you have to hold the handle bar down for your engine to run. This cable becomes stretched after some time and needs to be replaced. There is a safety switch on the other end of that cable, on the motor, that Will not be opening all the way and in turn, not letting the engine spark.
4. Coils. Lawnmowers and small engines have changed a lot in the last 15 years. 99% of all lawnmowers and small engines today have electronic ignition coils which means no points. When you start your lawnmower or small engine and it runs until it gets hot and won't start back again until it cools off you Will have a bad coil.

Lawn Mower Repair Troubleshooting Lawn Mower

Jan 16, 2016 | Garden

2 Answers

Powermate 4000 with Briggs & Stratton motor (8hp) won't start. New spark plug, gas & fuel stabalizer added, oil added. What could be wrong?


Next step is to check that the magnet attached to the fly wheel is working properly. When you crank the generator over, put a multimeter on the leads to the magnet and look for a spike in the voltage. Be sure to get the polarity correct or you will damage your multimeter. If there isn't a spike in the voltage, then either the magnet is bad or the fly wheel is damaged. In either case parts will have to be ordered and replaced. If there is a spike in voltage, then it is time to check the fuel intake. Open up and take out the air filter. Inspect the air filter to make sure it is clean and doesn't have fuel or oil in it. If the air filter is we with either things, then this will prevent air from reaching the engine. This alone will cause it not to start. If the filter is clean, then leave it off and open up the throttle. This will give you direct access to the engine through the fuel intake. Put some fuel into a spray bottle, and when you crank over the engine spray some fuel into the hole where the air filter was. If the engine starts/sputters then you have a problem with your carburetor. If the engine doesn't start then you have a deeper issue that may require a trained mechanic to fix. Lets say that if the engine does start/sputter, then we need to take the carburetor off. Our goal is to clean the carburetor of any build-up and/or corrosion that has settled in the carburetor bowl. The carburetor is between the air filter assembly and the main engine block. When in doubt, trace the fuel line from the gas tank, and it will lead you to the carburetor. Next, grab the necessary tools and start by turning off the fuel and draining the carburetor. The fuel valve is typically inline with the fuel line. To drain the carburetor bowl loosen the screw on the bottom of the carburetor bowl. Once the last drop is out, then unbolt the carburetor from the engine block. With the carburetor off and parts labeled for easy re-assembly, you then have to remove the fuel bowl. This will either unscrew as a whole from the carburetor body, or have a central bolt that has to be removed. When removing the bowl, PLEASE be very careful and mindful of the fuel float and the filling pin. With the bowl safely off, inspect it for fuel build-up and rust/corrosion. If there is either in the bowl then this means you need to grab a fuel safe cup and an old toothbrush and carefully start cleaning the bowl and the surrounding parts. If you are comfortable with small parts at this point, then carefully remove the fuel float and the the filler pin underneath it. Please take note on how this dis-assembles to ease re-assembly. Clean these parts as well with the clean fuel and toothbrush. Assemble the parts back together once you are sure everything is clean and put the carburetor assembly back onto the engine block. Once everything is tightened down, it is time to turn the fuel back on at the valve on the fuel line. With the fuel back on, hit the prime button 3-5 times and crank the engine over. If the engine doesn't turn over at this point, then there is a much deeper mechanical issue that requires a trained mechanic to fix. Most mechanical fixes at this point are not worth your while and you may save money by purchasing a new engine/generator. Please let me know what you find during diagnosis, and I can provide more help.

Aug 27, 2011 | Coleman Powermate Premium Plus 6250W...

1 Answer

featerlite weedeater will not start


Hello list1016:

Depending on the OEM and Model Number of the Carburetor, it Sounds like the Fuel Filter Requires Changing, the Primer Check Valve is Stuck and Stopping the Primer from Operating, the Carburetor Filter/Screen is Restricted or the Carburetor Metering Jet is Stuck.
For the Fuel Filter;
The Following is a Basic Instruction File I made for Replacing the Fuel Lines and the Filter on Chain Saws and Trimmers. Any Input is Appreciated.
>>The Fuel Line is Pushed and Pulled (I Use Long Needle Nose Pliers) Through the Small Hole Until the Hose is Out the Fill Hole about a 1/2".
>>You can Also Use a Coat Hanger with a Small J at the End to Hook the Filter in the Tank and Pull the Filter and Hose (if Detached from the Carburetor) Out the Tank Fill Hole Enough to Replace the Filter.
>>Then Attach the Filter and Pull the Hose Back Until the Filter Lays at the Bottom of the Tank Just Below the Fill Hole (or so it is in the Bottom of the Tank and will Rest in the Fuel Mix when Turned at Common Angles the Unit May be Turned to During Operation.
>>**Hint: Use Plenty of Spray Lubrication at the Small Hole as you are Feeding in the Hose. It Slides Easier.**
For the Other Possible Causes, Soak and Clean the Carburetor.
>>The Following is a Basic File I Made for Cleaning Carburetors. Any Input is Appreciated. Even though the Carburetor LooksClean, the Internal Passages May be Restricted with Varnish that GasCauses to Build Up over Time.
>>Spray Cleaners Remove this Varnish in Layers, so Soaking is the Only Sure Way to Remove ALL this Varnish.
>>I have Found that Most People can Use a Breakdown/IPL and Disassemble the Carburetor Enough for Proper Cleaning.
>>Remove Any Adjustment Screws that Go Into the CarburetorBody. The Welch Plugs Do Not have to be Removed.
>>If you are Able to Remove and Disassemble the Carburetor and Keep the Gaskets Intact, then Usually these Gaskets can be Reused. The Only Parts you May Need to Replace are the Needle Valve and Metering Pump Diaphram.
>>If you Order a Kit, then Replace All the Old Components with he New Ones in the Kit even if the Old Parts Look Good.
>>Once Disassembled, then Soak the Carburetor Body and Parts in a 1 Gallon Can of Gunk Carburetor Cleaner Overnight. The Can has a Parts Tray Inside it for the Small Parts.
>>Once the Carburetor and Parts are in the Cleaner, you can Replace the Lid for Safety and to Prevent Accidental Spillage.Then Blow Out the Passages with Compressed Air.
>>***(Do Not Use High Pressure Air for the Zama Carburetors, they have Check Valves for the Primer and these
re Usually Blown Out of the Carburetor if Not Careful. Allow the Zama Carburetor to Set on a Drip Pan and Dry)***.
>>****All the Carburetor Adjustments are the Same for LawnMower and Trimmers.
>>If the Main Air and Idle Air Mixture Screws are Side by Side on the Side of the Carburetor, then the Idle Air is Nearest the Engine.
>>****Turn the Idle Air and Main Air Mixture Screws In Until SNUG **Do Not Jam** Then Reverse Both Screws 1 1/2 Turns. Holding the Throttle Full Open, Start the Engine. Turn the Main
ir Mixture Screw Clockwise Until Proper Revs are Obtained. Occasionally you May have to Turn this Counter Clockwise to Achieve the Proper Revs. Now Allow the Engine to Idle. Set the Engine Idle Screw (Not Idle Air) so the Engine will Stay Running if Required. Now Set the Idle Air Mixture Screw so there is No Hesitation when Throttling from Idle to Full Throttle. Reset the Engine Idle if Required.****
>>If you have Questions, Please Ask. The links above Provide Good Directions on Cleaning the Carburetor. Make sure you use an Compressed Air to Blow through all the Carburetor Passages to make sure they are Clear.
>>1- http://www.repairfaq.org/samnew/lmfaq/lmclctc.htm
>>2- http://www.cpdonline.com/692509.pdf .
Please, Do Not Hesitate, If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

May 11, 2009 | Garden

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