Question about Husqvarna Riding Lawn Mower 42 Inch Cut Yth2042

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New plugs and filters. Still sputters and dies after hot. Usually starts again. Sometimes will stay running once you choke it again, and sometimes comes out of it all together.

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Tracking down fuel problems.

  1. Make sure there is plenty of fresh fuel in tank. High Octane less than one month old. Water in the fuel system will often cause hard starting, low power, backfiring, surging or stalling
  2. Is there a cut off valve at the gas tank? If so check that it is open or working if it is electric.
  3. This step comes from repeated personal experience with JD gas tanks. Remove fuel line from filter and remove the filter, gas should pour out of the hose coming from the tank. (look at the filter before removing it, it should look at least 1/2 full of fuel.) If gas does not pour out remove gas tank cap. If fuel flows now, you need to unclog the cap vent or replace the cap. The vent is that tinnnny little hole in the center of the cap. If the fuel still does not flow then blow air from the filter end of the hose back up through fuel line to blow out any blockage inside the gas tank.

    Do your self a favor, leave the gas cap off and turn the outlet air on your compressor down below 20 psi. If the tank is nearly full you will blow gas out of the tank. Do this outside if possible; at the very least you need a well ventilated area. After blowing air from the air filter back to the tank, you may have to reverse the process and pressurize the tank to get the fuel started. I place my hand over the open tank and hold the air hose between the joint of my thumb and forefinger to seal the tank, and then squeeze the trigger. Once you have a good fuel flow out the line to the filter, put on a FRESH FILTER. Try cranking the engine. If it still does not start move on to the fuel pump and carburetor
  4. Check the fuel pump. The fuel pump system on the twin Koehler and the Twin Briggs (and others) are almost identical. Watch this excellent, eight minute, video to learn how to check the fuel system, including the pump, up to the carburetor. . Small Engine Repair Checking Vacuum Fuel Pump Fuel System on Kohler Twin...
  5. Note: My engine was starting hard and dying in the field this year (March 2015). While doing a valve adjustment, I found a hairline crack in the bend of the vacuum hose powering the fuel pump. It's the short hose running from the valve cover to the fuel pump. The fuel pump will not work if this hose is cracked.
  6. Many systems have a fuel shut off solenoid. This is a small cylinder on the bottom of the carburetor. It has two wires running to it. It should make an audible click when you turn the key on. If it does not click you will have to replace it or track down an electrical problem.
  7. If this has not solved the problem you may have to remove and disassemble, clean, or rebuild the carburetor at this point. You may have water, dried fuel (varnish) or trash in the carburetor bowl. Before removing and disassembling the carburetor try draining the bowl. Or, take the bowl off, careful not to drop the small parts inside. Clean the bowl and replace. I often remove the bowl on small engines and save the hassle of a complete carb removal.

NOTE: Connect a volt meter across the two battery posts. If battery voltage drops below 9 volts when cranking or while the engine is running, the fuel cut off solenoid will not function. That means the engine will not start or will die soon after starting. So check your battery voltage before, during, and after cranking. If the battery voltage is good before but drops below 9 volts while cranking this is generally a sign the battery has one or more bad cells. Replace the battery. If the battery is in fact good, and the voltage is still dropping, you may have a bad starter motor which is drawing too much amperage.

If you find this fuel checkup does not solve the problem, repost your question with updated info and I will walk you through the next step. Tracking down a spark problem; yes, your problem could involve the coil. (Not as likely as fuel)
Small Engine Repair Checking Vacuum Fuel Pump Fuel System on Kohler Twin...

Posted on Apr 08, 2015

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I if it dies when it gets hot, its mainly the coils, replace it I you have 2 of them replace both (coils can be expensive do a little shopping around to get the best price first) , as far as sputter clean your carb and replace the carb-kit. here's a tip for future reference - when setting your new coil place the magnet in front of the coils mount and place a regular business card between the coil and the magnet to give it the right space to make your spark then mount the coil and repeat for the other, its not complicated as far as checking your fuel pump just unhook he gasline GOING to you carb and place a clear cup or jug to catch the gas and turn the key to fully crank your mower to see if its pumping correctly if its shooting out a lot then your fine if its a dribble here and there then replace fuel pump. hope this helps

Posted on May 17, 2015

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: spitting and sputtering

mine did the same, I found out that the high speed jet was clogged, I pulled the fuel line off the filtor(going to the carb), stuck the line into a mixture of half gas half carb cleaner, I fanned it up and in 2 or 3 minutes it started running well, hope this helps.

Posted on Jun 03, 2009

2coolrick
  • 560 Answers

SOURCE: won't start, has "varnish" from fuel

Does it have a fuel pump or is it gravity fed? If gravity fed, when you rebuilt the carb, did you make sure that the main (power) jet orifice was totally clean? No varnish or residue in the hole. Pressurized air or carb cleaner spray into the jet is a good way to test flow restrictions. It sounds like a clogged main jet or a vacuum leak at the carb to manifold gasket. You might want to flush the gas tank and replace the gas cap also, as evaporating fuel over time will leave behind varnish deposits if the cap doesn't seal, even though it is a vented cap.

Posted on Jul 31, 2009

  • 257 Answers

SOURCE: Runs for 5 seconds with choke pulled;no crank without choke

check your fuel pump to see if working,, then clean or replace carb,, and do tune up on it,,, hope this help you,, good luck

Posted on Aug 15, 2009

#1 Taper
  • 1040 Answers

SOURCE: 4 stroke engine runs then fades, runs then fades- cylcing

You need carburetor work.

Youwill need to disassemble the carburetor and spray withcarb.cleaner.

Use a Den Tek Brush, (http://www.drugstore.com/products/prod.asp?pid=165357&catid=1152),to clean the small portals in carb. These portals can become blocked. Reassemble and start.

If the carb. parts are more than 4 years old, you may have to replace them.

The smoke is more than likely because it is flooding. There's too much fuel getting into the carburetor. The choke may be sticking.

If you need further assistance just let me know.

Jim

Posted on Nov 28, 2009

ftw1952
  • 10319 Answers

SOURCE: HI there.. please help.. tractor

the air mixture carburetor screws have vibrated out causing this dilemma. you will need to readjust them or have it done by a qualified repair technician

Posted on Jul 04, 2011

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