Dee hua engine will roll over but won't crank.

Are you pulling the plug to check for wetness after cranking it a few times, WITHOUT using the starting fluid? Also, I would recommend using carb cleaner in place of the starting fluid. Starting fluid runs the engine VERY hot for a brief time and can possibly damage rings, valves, and aluminum parts.

check the fuel cut off switch in the trunk its on the l/s .look for yellow label

Are you priming it Salvador?Check the plastic bulb,may be cracked and not putting gas in the chamber.

Most Fords have a fuel reset button. When you ran out of gas you tripped the circuit. Most of the time the button will be on the passenger side by the kick panel. The exact location should be in your owners manual or your local library or auto parts store will have a copy of one for your specific vehicle.

That sounds like the fuel pump may have lost it's prime. Does it have fuel injection, or a carburetor on the engine? How much gas was in the tank while it was parked on an incline? Have you tried any starting fluid sprayed into the air intake hose, toward the engine? Warning! Don't use much starting fluid! Perhaps a one or two second burst, and have someone crank it immediately after you have stepped back at least 6 feet from the engine. If it fires, then it is definitely a fuel delivery problem! But it won't run long like that unless the fuel pump starts working again ... which is most likely when the engine is cold!

Next step is to check that the magnet attached to the fly wheel is working properly. When you crank the generator over, put a multimeter on the leads to the magnet and look for a spike in the voltage. Be sure to get the polarity correct or you will damage your multimeter. If there isn't a spike in the voltage, then either the magnet is bad or the fly wheel is damaged. In either case parts will have to be ordered and replaced. If there is a spike in voltage, then it is time to check the fuel intake. Open up and take out the air filter. Inspect the air filter to make sure it is clean and doesn't have fuel or oil in it. If the air filter is we with either things, then this will prevent air from reaching the engine. This alone will cause it not to start. If the filter is clean, then leave it off and open up the throttle. This will give you direct access to the engine through the fuel intake. Put some fuel into a spray bottle, and when you crank over the engine spray some fuel into the hole where the air filter was. If the engine starts/sputters then you have a problem with your carburetor. If the engine doesn't start then you have a deeper issue that may require a trained mechanic to fix. Lets say that if the engine does start/sputter, then we need to take the carburetor off. Our goal is to clean the carburetor of any build-up and/or corrosion that has settled in the carburetor bowl. The carburetor is between the air filter assembly and the main engine block. When in doubt, trace the fuel line from the gas tank, and it will lead you to the carburetor. Next, grab the necessary tools and start by turning off the fuel and draining the carburetor. The fuel valve is typically inline with the fuel line. To drain the carburetor bowl loosen the screw on the bottom of the carburetor bowl. Once the last drop is out, then unbolt the carburetor from the engine block. With the carburetor off and parts labeled for easy re-assembly, you then have to remove the fuel bowl. This will either unscrew as a whole from the carburetor body, or have a central bolt that has to be removed. When removing the bowl, PLEASE be very careful and mindful of the fuel float and the filling pin. With the bowl safely off, inspect it for fuel build-up and rust/corrosion. If there is either in the bowl then this means you need to grab a fuel safe cup and an old toothbrush and carefully start cleaning the bowl and the surrounding parts. If you are comfortable with small parts at this point, then carefully remove the fuel float and the the filler pin underneath it. Please take note on how this dis-assembles to ease re-assembly. Clean these parts as well with the clean fuel and toothbrush. Assemble the parts back together once you are sure everything is clean and put the carburetor assembly back onto the engine block. Once everything is tightened down, it is time to turn the fuel back on at the valve on the fuel line. With the fuel back on, hit the prime button 3-5 times and crank the engine over. If the engine doesn't turn over at this point, then there is a much deeper mechanical issue that requires a trained mechanic to fix. Most mechanical fixes at this point are not worth your while and you may save money by purchasing a new engine/generator. Please let me know what you find during diagnosis, and I can provide more help.

If it is fuel injected check for fuel pressure at the fuel rails. If it has a carburetor then try pouring a little gas in the carburetor and see if it will start. If you have no pressure at the fuel rails or the motor starts after adding fuel directly then the problem is the fuel pump.

yea got get you more troubles
just check the alternator is charging well and no battery light on dashboard it indicate the bad alternator
monitor your battery if it got old and cannot hold the charge any more
you said when you used another one your car turned on

Check for spark first If it has spark, remove the breather and put a few drops of gas in the carburetor.

Unable to crank? Do you mean unable to start?

If you leave gasoline inside tank over long period of time, that will 'gum-up' and ruin carburetor.
To prevent problem, put additive in gasoline or empty gas from tank:: under gas tank should be a hex bolt that holds up gas filter > loosen bolt and drain gas.

Starting the engine:
Take off air filter and spray WD-40 directly into carburetor.
Start engine, engine should fire on the WD-40 accelerant.
If engine fires but does not keep running, try spraying WD-40 into carburetor continuously to see if you can keep engine going.
If engine stops each time after it no longer gets WD-40, then carburetor is bad or gasoline not getting to carburetor or gasoline is bad.
Try fresh gasoline.
Do not turn small engine on side or upside down or oil will get into carburetor.

Check gas supply: Go to gas filter under gas tank. Pull loose rubber hose that connects to carburetor and see if gas comes out rubber hose.
If gas is flowing to carburetor, then carburetor is gummed up.
Small engine repair might suggest 'gum out' or have other suggestions ... but you may need a new carburetor

If engine will not fire on WD-40
If engine will not fire on WD-40 at all, then spark coil may be bad or exhaust port is clogged
Check screen that covers exhaust >> is it covered with carbon and dirt or can air pass through it easily?
Check spark
Remove spark plug
Put spark wire back on spark plug
Hold spark plug by rubber spark cap so hands don't touch metal part of spark plug
Touch spark plug threads against hole where spark plug was removed >>> metal to metal so it conducts electricity
Pull start cord and look for sparking between spark plug threads and metal of engine (don't look at the spark gap ... look where metal meets metal
If you have no spark, the spark coil is bad >> time for estimate from small engine repair shop or get your part number and order replacement