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A flooded engine will not start even with starter fluid.
You need to get the cylinders dried out and try starter fluid alone by draining the fuel from the carburetor bowl and pinch off the fuel line at the carb inlet. Then remove spark plugs and crank engine for several seconds to dry out the cylinders.
Next, reinstall spark plugs and remove the air filter. Leave fuel line pinched off. Set 3/4 throttle (choke off). Then spray a 1 second burst of starter fluid directly into the carburetor throat. Don't bother with the air filter and promptly start the engine.
Remove air filter. If its saturated with oil it is no longer useable so replace with new filter. Remove spark plug, drape a rag over the plug hole and crank engine for a second or two (expels any oil/fuel that may be cylinder). If spark plug is fouled with oil, wash oil away with carb cleaner or starter fluid or replace plug. Reinstall spark plug. Check oil, if fuel in oil replace oil else, add oil to safe level. Check fuel level. Start.
Spray starter fluid (something flammable) in the carb and see if you can keep it running. If you can keep it running that way, your carb is not clean, not set up properly, mis-adjusted or ???
If spraying starter fluid in the intake causes it to run for a few seconds, then you have a fuel problem. That starter fluid is the fuel. If it didn't have spark, it still wouldn't run. I would start checking the carb and make sure nothing is stuck or plugged.
The fact that it started for any length of time, tells you the engine functions. The engine is STARVED of fuel mixture. Either the inside fuel line is clogged and needs to be blown out or the carbonator adjustment is incorrect. Check to see that the spark plug GAP is proper and when placed back into the engine it is hand tight with the spark plug wire formly in place.
Did you just clean the Bowl in the Carburetor or did you make sure the tiny holes in the Jet was clean too? Not familiar with this model but I doubt it is anything more than Gravity fed.
If the bike has been sitting awhile it more than likely needs a carb clean. But don't do a carb clean by putting any kind of cleaner in the gas. It will just plug the jets that much more.
Have you checked spark plugs? I always check the "BIG" three when diagnosing any engine. Compression, spark, and fuel. I recommend buying a compression tester and a spark tester. Check both of those, if ok then make sure your still getting fuel to the carb. If so, try a shot of starting fluid through the aircleaner, if it starts on starting fluid then dies, you have a dirty carb. I would first of all replace plugs and give this unit a tune up. Good luck and happy wrenching!
Remove the air fillter and look in to see if the choke butterfly is closeing if it is then it is a fueling problemRemove the carb and take out the main jet valve in the centre of the carb. Blow out the holes and make sure they and the rest of the carb is 100% spot less rebuild and refit also clean the air fillter and this hopefully should sort out your probleml davidson lawn mower tech
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