Question about 2004 Honda CRF 450 R

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Wont start has fuel and spark and it fires once a while and back fire thru carb , timing chain looks right on the money, just riding it and it died and wont start ?

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Check your flywheel the keyway probably broke i had the same problem

Posted on Aug 21, 2010

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98 harley fatboy turns over but wont start


some after market ignitions don't spark on the first couple of turns but first take off your air cleaner twist the throttle and look to see if gas is spraying in the carb if not give it a little starting fluid if it fires but then dies then its carb issue. now other thing to check is if you have three posts on your coil then its single fire and your plug wires might be going to the wrong spot switch um around.

May 09, 2014 | Harley Davidson FLSTF Fat boy Motorcycles

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John Deere 265 starting problem


To start ensure that is not a carb problem, and that the engine is not chocking because of incorrect carburetor settings. The carb should also taken apart and cleaned.

Try also running the engine without fuel tank cap, if engine runs fine replace the tank cap.

if carburetor, fuel filter, tank and fuel lines are ok it may be a faulty fuel pump failing. To test the fuel pump, insert a pressure gauge tool like this in the lines out from fuel pump.

Regards.

Jul 13, 2009 | John Deere 420,1020,2010,2020,2510,2520...

1 Answer

Intermittant no spark. Cruising along and shuts off like someone flipped a kill switch


Gotta be either fuel, fire, compression or timing, so next time it dies, spray a little starting fluid into the intake, if it starts right back up -fuel problem-probably stopped up fuel filter, bad fuel pump. If not, remove a spark plug wire and attach old spark plug , lay it on a grounded metal part of the engine or frame , have someone try to start it, watch to see if the plug is firing.

Apr 30, 2017 | Haynes Ford Pick-ups and Bronco Repair...

1 Answer

Scag zero turn 52"deck tiger mower


If you have spark, compression, and fuel to the carb but not at the plug. You have a clogged carb. Try starting with starting fluid, if it fires briefly, your carb needs to be removed and cleaned.

Sep 03, 2013 | Garden

1 Answer

Car will start right up when cold go down road dies starts back up once hot shut off starts back up let it set ten min. wont start has spark has fuel pressure put new fuel pump in old pump did same thing...


Could be a relay or other electrical issue.
You say it has fuel pressure and spark, if that were true it should run.
So it either does not have enough spark to fire the plugs under compression, or not enough fuel pressure going thru the injectors, or not at the right time.
You might want to check for trouble codes in the computer.
There has to be something missing from the equation when it won't start. You may have to check all of the plugs for fire and try some carb cleaner sprayed into the intake to boost fuel supply to find the issue.

Sep 20, 2012 | 1989 Buick Century

1 Answer

I have a 1991 honda cr 250 I cant get to start at fist gas ran right thru carb and out bottom i took carb apart and got the floats to stop sticking cleaned it out with carb cleaner put back together but...


try a new spark plug. if u fowl out a plug some time they will not fire under compression.2 strokes need. fuel,fire and air, very simple engines.it is possible crank seal are bad .that doesn't allow the engine to create vacuum in the crank case.thus fuel and air will not make it to combustion chamber.

Jul 11, 2010 | 2002 Honda CR 250 R

1 Answer

Jonsered 4036 chain saw shows fire at spark plug won't fire.


Brake cleaner might not be the best choice for test firing... Pick up a can of Starting Fluid and spray a VERY SMALL amount into the air filter...
If it still doesn't turn over the engine might be worn out/damaged internally... At this point I'd compression test the engine and if the compression is lower then 80-90PSI It would be time to get a new saw.. If you can't get you hands on a compression tester you might want to take it to a Lawn and Garden shop and have them look at it..

If it does turn over with the Starting Fluid you looking at a fuel problem and I'd start with changing the gas with a fresh can and checking the (fuel filter) <-- found in fuel tank...


It will run with the bar off..

The brake only stops the chain and has nothing to do with the spark...

Hope this helps..

May 20, 2009 | Garden

1 Answer

Bike only fires once


Okay, let's have a look at it. Say Ahaaa.
The probable cause of the problem is not the spark. Get a fresh set of Stock NGK spark plugs, ground the plus to the engine, and check each cylinder for spark as the starter button is pressed for 3 seconds or so. I will wager that the spark is present.

The likely problem is the fresh gas was put into a very rusty gas tank. Bits of rust now inhabit your carb and are having fun plugging up the carb. Look at the gas valve. With a little luck there is a small bowl behind the valve. Remove it and tell me what you see in the bowl.

Apr 11, 2009 | 1982 Yamaha XS 400 SE

1 Answer

Poulan 18' model 2000 chain saw, quit running , will not start.


If you have a compression gauge, check the compression. Anything under 90psi is too low.

Check your flywheel key. If it is broken the flywheel will move and not fire at the correct time.

Note: if it does not sputter with carb cleaner then it's not your carb.

Next:
Remove your exhaust manifold. Look into the cylinder with a flash light. You are looking for scratches. Anything larger then a light fingernail is definite proof you need a new cylinder/piston assy.

If it passes that test do the following:

Pour mixed fuel straight into your cylinder until 1/4 full. Slowly pull your saw over while looking into the cylinder. If you see bubbles after the ring/rings go by then you need a new cylinder/piston assy. On rare occasions if no scratches are present on the cylinder wall or piston, you may be able to change just the rings.

Mar 31, 2009 | Poulan Pro Chain Saw 46cc 20"

1 Answer

I have a 1993 plymouth grand voyager with the 3.3 engine, it will turn over and fire once, then nothing. do you think the timing jumped or the gear and chain grenaded on me? it ran fine last night and this...


hi from uk let's not think negative waves? and just go back to basic process of eliminating ? what simple causes could be wrong ? if engine fired up then died? could be ignition fault or fuel supply? have you got spark when engine turns over ? if so check fuel ? is fuel pump working/delivering to engine ? from what you described engine did fire but died ? and now turns over but no attempt to start if fuel pump failed ? engine would normally start initially but die when fuel is used up in carb or efi system if you suspect cambelt/chain has failed you would have heard noise as pistons hit valves ?? then when you turn engine over ? it would spin faster with lack of compression does this make sense to your theory? i would think positive and do these diy checks as mentioned above first you may find fault yourself without spending $$$$$s for garage to charge for same checks?

Nov 06, 2008 | Plymouth Grand Voyager Cars & Trucks

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