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Backfires when attempting to start. May have used fuel with water in it, emptied gas tank and replaced fuel filter and spark plug

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Have you checked the flywheel key? Could be the key is partly sheared.











Posted on Apr 29, 2010

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6ya6ya
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Won't start, gas out of exhaust


Sounds like its flooded : excess fuel / wet spark plug.
Empty tank / Clean and dry spark plug. test plug for spark before refitting. If strong spark refit plug / and see if fires when turn engine over.
If it does then refill tank with new clean fuel and attempt to start without choke to avoid flooding.

May 25, 2016 | Toro Garden

1 Answer

Good spark clean carb and tank. Wont even backfire or try to start.


Hi, Pete and the usual suspects are:
1. Fuel tank empty.
2. Fuel supply valve/petcock turned off.
3. Fouled spark plugs.
4. Engine flooded as a result of overuse of the enricher.
5. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
6. Fuel valve/petcock or filter clogged.
7. Discharged battery, check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
8. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and module.
9. Spark plug cables in bad condition and shorting, cable connections loose, or connected to the wrong cylinders.
10. Ignition timing incorrect due to a faulty ignition coil, ignition module or sensors (MAP, CMP, CKP, O2 and/or BAS).
11. Security alarm needs a reset.
Good luck and have a nice day.

Nov 19, 2015 | GAS Motorcycles

2 Answers

1997 harley davidson has real weak spark woint start


Hi Donnierotten, and the usual suspects are:
1. Severely discharged or damaged battery.
2. Loose, corroded or broken battery cable.
3. Alternator not charging or below normal rates.
4. Failed ignition coil, ignition/electronic module.
5. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor.
6. Faulty ignition switch.
7. Water or dirt in fuel system, carburetor or filter.
8. Fuel tank vent system plugged or gas cap not venting.
9. Fuel tank empty.
10. Fuel valve vacuum line broken or carburator vent line closed off.
11. Restricted, blocked or kinked fuel line.
12. Failed fuel pump, pressure regulator and or fuel injectors.
For a prime suspect please visit website below and good luck:
Harley Davidson Sportster error codes and how to access them

Jun 17, 2015 | Harley Davidson Motorcycles

1 Answer

Why does a pressure washer suddenly stop working?


Wide range of causes, Gerry. Empty fuel tank, old/bad fuel, or water in fuel. Dirty carburetor. Fuel shutoff valve. Sticking carburetor float valve. Fouled spark plug. Points. Magneto. Shutoff switch. Compression. Sticky valve. Water in intake. Dirty air filter.

Check for fuel at the carburetor, check for spark at the spark plug.

Might be simple - you might simply have flooded it. Let it sit for several hours, then try to start it again... with NO choke at first.

Aug 13, 2014 | Garden

1 Answer

My husqvarna yth2348 riding mower is havering carb issues not getting fuel


Here are a few tips to look at, I would first check your inline fuel filter to make sure its not clogged up. See Page 26 of the Manual for additional help.

http://www.husqvarna.com/ddoc/HUSO/HUSO2010_NAen/HUSO2010_NAen_YTH2348_532441716.pdf

PROBLEM
Will not start

CAUSE CORRECTION
1. Out of fuel. 1. Fill fuel tank.
2. Engine not "CHOKED" properly. 2. See "TO START ENGINE" in Operation section.
3. Engine flooded. 3. Wait several minutes before attempting to start.
4. Bad spark plug. 4. Replace spark plug.
5. Dirty air filter. 5. Clean/replace air filter.
6. Dirty fuel filter. 6. Replace fuel filter.
7. Water in fuel. 7. Empty fuel tank and carburetor, refill tank with fresh gasoline and replace fuel filter.
8. Loose or damaged wiring. 8. Check all wiring.
9. Carburetor out of adjustment. 9. See "To Adjust Carburetor" in Service Adjustments
section.
10. Engine valves out of adjustment. 10. Contact an authorized service center/department.

Apr 15, 2014 | Husqvarna Lawn Tractor 48" Deck, 23 Hp,...

1 Answer

Helpme!


Check for spark at spark plugs then check fuel and fuel filter .

Troubleshooting a small Petrol engine that won't start requires a series of short tests and the process of elimination.
Understanding the principles of how a small engine operates is helpful but not necessary.
Proper disposal of hazardous liquids will be required.
The knowledge gained in the performance of this procedure can be applied to many different types and sizes of internal combustion engines.
The average weekend mechanic can complete the process in about an hour.
Put on the safety glasses.
Remove the gas cap and check that there is gas in the fuel tank.
Look at the inline gas cutoff valve located below the gas tank on the fuel line and make sure it is in the on position, with the knob turned straight in line with the fuel line.
Look at the spark plug and check that the wire is securely plugged onto the plug.
Try to turn the spark plug by hand and make sure it is screwed firmly into the hole.
Look at the ground strap by the spark plug and make sure it is not touching the spark plug.
Look at the kill switch located by the controls and make sure it is in the run position.


Remove the air filter by unsnapping its box-like cover or removing the wing nut that holds it onto the carburetor.
Lift the air filter out of the holder and set it aside.
Spray a shot of starting fluid from the aerosol can into the empty air filter area of the carburetor and try to start the engine.
Let the engine run about 30 seconds or until it dies.

Eliminate the electrical system as the cause of the problem if the engine started right up, ran a few moments, and quit.
Remove the gas line from the carburetor by loosening its hose clamp with the screwdriver kit.
Hold the fuel line over the clear glass container and let some gas run into it.
Look at the gas, checking for water and impurities.

Drain the gas tank if the gas looked impure.
Remove the gas filter from the fuel line by loosening its hose clamps with the screwdriver kit.
Replace the gas filter with a new one if the gas did not run into the glass at a rapid pace.
Reinstall the gas line and gas filter.
Fill the gas tank with new gas.

Find a small drain bolt located on the very bottom middle of the carburetor.
Place a small container that gas won't melt under it and remove it with the wrench kit.
Let the old gas drain out of the bottom until the new gas starts to flow out. Screw the drain bolt back into the bottom of the carburetor.

Clean up any spilled gas off the motor and elsewhere with the shop rag.
Place the rag in the metal bucket a safe distance from the work area.
Clean the air filter with warm, soapy water if it is the spongy type, or replace it with a new one.
Install the air filter. Start the engine.

Unplug the spark plug wire from the spark plug if the engine did not start.
Hold the insulated part of the spark plug wire with one hand and place the bare part about 1/4 inch away from the top of the spark plug.

Try to start the engine and watch for a spark between the wire and the plug. Replace the spark plug wire with a new one if it shocked you through the insulation.
Remove the spark plug using the spark plug wrench and replace it with a new one if there was a spark.
Try to start the engine. Let the engine run until it performs smoothly.

Do not do anything else if there was no spark, as the trouble is inside the internal workings of the engine and requires professional repair and tools.
http://www.popularmechanics.com/cars/how-to/maintenance/1272351?click=main_sr

Jul 11, 2013 | ATVs

1 Answer

My 12 year Craftsman lawn tractor with 20.5 hp B/S engine and 42" blades will not start. The starter turns over fine but no start. I don't know if it is igntion or fuel problem. I replace the...


Test for spark. Make sure the air filter is clean. Then make sure fuel is getting from the gas tank to the carb. Old rubber fuel line deteriorate and stop up small ports and parts in the carb. An inline fuel filter is a good idea on these larger engines. Sometimes, a larger B & S engine needs the OH valves adjusted to start easily and run properly. If after attempting to start, does the new plug get wet or even smell like gas? You should always use gas LESS than 30 day old. Gas goes stale like bread and milk. You can remove the fuel line from the fuel tank at the carb to drain old gas. You can also remove the carburetor bowl to check for water and sediment (which need to be cleaned out). Check these things and post back.

Sep 05, 2011 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

3 Answers

I have a Homelite Easyreach Model # UT20044A that will start, but then dies. Cleaned the filter, spark plug but still dies


Check that the carburettor and fuel lines are clean. If the unit has not been used for a while the gas (petrol) will evaporate leaving the oil behind to choke up the fuel system. Dirty fuel will do the same. When adding fuel use a funnel with gauze filter in it and always empty the fuel tank and then run the motor until it dies when you've finished work.

Sep 09, 2010 | Homelite Mighty Lite Lawn Trimmer

2 Answers

Mower will not start


you could have water in gas,look in the gas tank for any bubbles floating on bottom of tank this is water empty gas from tank and remove carburetor bowl too remove water from it .

May 13, 2009 | Garden

1 Answer

Misfire


This sounds like it may be as simple as cleaning the water or gunk out of the gas tank which is what I always do 1st because it's easy and inexpensive.
If your fuel is contaminated with gunk, grime, water and/or bottom junk like rust this will cause stalling!

Fill the tank with High Test, Add some dry gas and a good fuel system cleaner or 2 or 3 and this should dissolve all the gunk and clean the injectors! Read & follow the cans' instruction carefully.
If this cures the problem never let your gas tank get below 1/4 and especially never run it to empty as this is when the gunk and/or water will enter the system!
Hope this helps!
Good Luck!
jackiaria
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Feb 08, 2009 | 2000 GMC Yukon XL

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