Question about Harley Davidson XL 1200 C Sportster Custom Motorcycles

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Water in fuel

Foul plugs

Posted by Anonymous on

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Hi Anonymous, drain fuel tank and high pressur air dry and let sit overnight, then drain carburator bowl, replace plugs. Good luck

Posted on May 02, 2015

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Posted on Jan 02, 2017

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I keep fouling plugs on my 2005 vstar 1100 classic tried going a step hotter but they still foul after a very short time? exhaust is open was that way when I bought it


Just a thought. is your air filter clean? A dirty filter will make it burn more fuel and cause the plugs to foul.Is your choke working properly? Both of these will foul plugs and use more fuel.

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1995 rodeo 2.6 efi petrol my son had put water in thinking it was petrol so drained it out I put a ltr of metho in then 25ltr 98 octaine now it backfires & has a miss


when you drained the fuel was it from the tank only and was fuel pump tested --if you didnt drain fuel lines and changed out fuel filter than your have water /fuel mix going into engine just a little water is enough to damage engine -foul up spark plugs -clog/damage throttle body

Jun 11, 2016 | Cars & Trucks

1 Answer

Hard to start ,and foul the plugs every 1000 miles .


Hi, Anonymous and the usual suspects are:
1. Spark plugs in bad condition or have an improper gap or are partially fouled.
2. Spark plug cables in bad condition.
3. Battery nearly discharged, should have 12.5 volts.
4. 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.
5. Throttle controls not adjusted correctly.
6. Water or dirt in the fuel system.
7. Water or dirt in the carburetor.*
8. Intake air leak.
9. Fuel tank vent hose and vapor valve plugged, or fuel line closed off, restricting fuel flow.*
10. Enricher valve inoperative.*
11. Engine lubricant to heavy (winter operation).
12. Ignition is not functioning properly (possible sensor failure).
13. Faulty ignition coil.
14. Valves sticking.
* Carbureted models.
For more information about your issue, please visit the websites below. Good luck and have a nice day.
Honda Rebel Hard Starting and bad Iddling
Troubleshooting No Start Honda Motorcycle
How To Get Your Motorcycle Up Running Randys Cycle Service


Dec 12, 2015 | Motorcycles

1 Answer

Bike sat up for 3 or 4 years. recently cleaned the carb, changed the plug and oil and bike started. Tried starting it recently and it wont. Seem to be backfiring sometimes when kicking it over.


clean plug .. although new plug if old fuel or unbalanced carb it may quickly foul. if this works you may need help to work out whats causing plug to foul.

Mar 10, 2013 | 2001 Yamaha YZ 426 F

1 Answer

Clogged fuel injectors- i am having a problem with either my fuel filter or injectors. i used some cheap injector cleaner for two tanks and the problem went away for a week. i filled the tank again without...


Check your plugs. Using cleaners can clear the clogged injectors but the junk they burn off sometimes ends up on the plugs and can foul them out. You may also have water in the gas tank. Using Dry gas additive for a few tanks will fix that problem. If the plugs are good and you have good gas in the tank (sometimes running the tank low will dredge up garbage and clog your fuel filter) then changing the fuel filter would be the next step.

Oct 14, 2011 | 1998 Dodge Ram 1500 4WD

1 Answer

Hi I have Lexus Rx300 year 1999. The problem is, some time when I start the engine, I noticed that the RPM meter shows low and the car little viberate and engine stops. But if in-between I push...


REPLACE SPARK PLUGS AND WIRES AND CLEAN FUEL INJECTORS. SOUND LIKE FUEL INJECTORS LEAKING FOULING OUT SPARK PLUGS WHEN YOU TURN OFF ENGINE.WHEN YOU START CAR UP NEXT MORNING CYLINDERS MISFIRING SO BAD FROM FOUL PLUGS ENOUGH SHAKE ENGINE.WHEN ENGINE RUNS FOR FEW MINUTES THAT WILL BURN OFF FOUL SPARK PLUGS UNTIL ENGINE RUN NORMAL.

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1 Answer

I just had my intake gaskets replaced, fuel filter...


it is if there was coolant in the system to foul plugs, And or cheap plugs were used

May 21, 2010 | 1994 Chevrolet K1500

1 Answer

Ryobi lawn hornet mk2


Change your spark plug
If the fuel oil mixture is too oily it will foul the spark plug and no cleaning will get it right.
If there is a lot of oil in the crankcase it may foul the new spark plug so another new one is needed

Aug 10, 2008 | Electrical Supplies

1 Answer

Will not startl


HOW WHERE THE SPARK PLUGS ?? BURNT ? WET WITH WATER ? WET WITH FUEL ?
DO YOU HAVE PRESSURE ON YOUR FUEL SYSTEM.

Jun 02, 2008 | 2006 Mazda Miata

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