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Model P0450N205 serial# 052510M041507 when prime

Model P0450N205 serial# 052510M041507 when prime it crank and then it go off after few second

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Check your fuel filter if you have one, normally they will be located in the fuel tank.
If the mower/weedeater is over a year old, then I recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.
Sounds like you will need to clean the carburetor or replace your carburetor internal rubber parts like the diaphgram and O rings.
Be sure to use compressed air to blow out all the fuel and air passages.
Be careful when blowing out the passages, because there are sometimes small rubber type seats in the bottom of some of the passages.
Sometimes you can get by with priming the carburetor or using starting fluid and letting it run a few times like that and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.
Keep in mind that the float for the carburetor must be level when you go to reassemble the carburetor or follow the instrucitons you get with the carburetor kit.
When you clean your carburetor and remove the jet screws, you will first need to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first and then turn them back out to their orginal position before you started.
This is a FREE answer,Please rate me

Posted on Apr 11, 2011


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I have no power at the fuel pump with the ignition on

With the ignition on , not cranking the fuel power will only turn on for two seconds > Just to prime the system . You need to test while cranking the engine . The PCM - engine computer energizes the fuel pump relay , most vehicles ! What year , make , model an engine size ?
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Car has been sitting up and will not start now. It seems to not be getting gas and I do not know how to prime a fuel injection system. Any help appreciated.

There is only a few cars fitted with an ancient petrol injection system that needed any priming.

Diesel engines mostly need the injection system priming but petrol injection systems do not.

Lots of cars use a system where the fuel pump runs for a couple of seconds when the ignition is switched on and that is all the time it takes to prime the fuel system. After a couple of seconds the fuel pump switches off and waits to restart when the engine is cranked.

As priming the system takes only a couple of seconds some manufacturers don't bother with the brief priming run of the pump and just have the pump start when cranking.

Could be faulty supply, fuse, pump relay or the pump itself.
If the car is fitted with an immobiliser, perhaps that is the problem.

May 07, 2016 | 1998 Mercury Mystique

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How to start after running out of gas

Wont crank, or won't start? If it turns over, leave the key in the 'on' position for a few minutes to let the electric pump in the gas tank build pressur, try cranking.

Nov 25, 2015 | Ford Ranger Edge/Edge Plus Model 2001-2003...

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2002 heritage with fuel injection every thing works but no power coming from fuel pump fuse and fuse is good?

First off testing for power at the pump can be tricky, The pump will only get power for a few seconds when you turn the key to the on position. This is the Fuel prime function. It will also stay powered when the engine is cranking or running. If the car doesnt run, you will either need to have a helper cycle the key (waiting 10 to 15 seconds between key off then on) or have them crank the engine over (for no more than 15 seconds at a time) to see if the pump is being powered, If the pump Still has no power during either of these, there is a wire between the fuse and the pump that needs to be repaired. You will have to physicaly examine the whole wire from fuse box back, If the fuel pump has power during the prime function but during cranking, I would suspect that it is the crank sensor, as this is the primary input to command the fuel pump to continue to run.

Apr 05, 2014 | Cars & Trucks

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Starting you have to crank it for a couple of seconds and stop then crank it again before it starts almost every time you start. If you shut it off only for a few minutes and then go to start it will fire...

try to prime the injectors first Turn the key to accessory position(do not crank) turn key to off Try to start the car. If this does not work try priming twice

Nov 29, 2010 | 2004 Mazda 3

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Car wont start

IIf doesn't crank then problem with neutral safety switch, starter solenoid, starter or ignition switch. If cranks then could be bad crankshaft sensor, bad ignition coil pack, blown injector(s) but usually you will get a stall beforehand. Fuel pump could be dead, turn key to ON (not starting) and listen for a few second hum as it primes the fuel rail. Also check to see if check engine light comes on for a few second with key to ON, if not then not powering up due to shirt or bad. Possible but rarely the fuel filter is so clogged it no longer allows fuel, but usually will allow start after sitting.

Sep 03, 2010 | 1998 Lincoln Continental

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I have a 2003 Nissan Pulsar Q series. I have recently replaced the fuel filter and pump. After turning on the ignition, the fuel pump will prime for a few seconds then stop. Any ideas as to what could be...

That's the way it works.
You put the key on , pump goes few seconds and stop(building up the pressure).When you crank the engine it start going again.

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1996 cheve lumina . gas pump, when I turn the key

When the key is turned to ignition there is a "Prime" mode that the computer rnus. the pump will only run for a few short seconds. If you crank the engine you should get power to fuel pump the entire time you crank the engine.

Oct 09, 2009 | 1996 Chevrolet Lumina Mini

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Car trys to crank but want

How about the fuel pump relay? or possibly the ASD relay. need to make sure you are getting voltage to the fuel pump when the key is on, the pump will run only for a few seconds when you turn the key to start to prime the system. If you dont hear the pump prime, check the aforementioned relays and associated fuses.

Feb 10, 2009 | 1990 Plymouth Laser

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Hey, did you try setting the petcock on Prime for a few seconds? If not, this might help get some gas back in the carburetors. Leave it on Prime for maybe 15 seconds, then choke it and start like you usually do. Once it starts, set it back to Run or On.

Nov 10, 2008 | 1988 Yamaha FZR 250

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