Air compressor engine Has spark but wont start.Īt this point there are three reasons an engine wont start If It has good Spark, If the spark is weak clean or replace it making sure to properly gap the plug, perform spark test again if it looks good reinstall it in to the cylinder head and start the engine. crank over the engine and inspect to see if the plug has a hot white/blue spark. hold the bottom of the spark plug to the top of the head. Attach the coil wire onto the top of the spark plug. Test the coil for spark before moving on remove the coil wire from the top of the spark plug insert a Philips head screwdriver into the coil wire hold the metal shank of the screwdriver to the head holding no more than 1/16 of an inch away making sure not to come in contact with the metal, crank the engine you should observe a spark jump from the screwdriver to the head, To check the sparkplug remove the sparkplug from the cylinder head. The most common cause of a small engine not starting is a lack of spark. Video can’t be loaded because JavaScript is disabled: Symptoms Of A Sheared Flywheel Key On A Lawnmower – VIDEO () check out this video by DONYBOY73 Compressor Engine cranks but will not start. The keyway keeps the flywheel in line with the crank if it off the engine will be out of time and will be hard to start and or run rough. there is a slight possibility that the crankshaft keyway is split or broken. If the engine is hard to start and everything so far checks out. If The Spark is yellow clean or replace the plug making sure it is gapped correctly according to the engine manufactures spec.Ĭlean the carburetor with carb-cleaner replace the fuel filter and retest engine. If the fuel looks good remove the spark plug and check for a strong spark, The Spark should be white/blue not yellow. The first recommended test Is to pull a small sample of fuel in a clear glass let is sit and see if it separates there will be a noticeable layer of water or oil is present, if the fuel smells bad or has noticeable contamination clean the tank, spark plugs fuel lines and replace the fuel filter. There are several reasons an engine will start but will run rough, The most common reason small gas engine run rough is poor fuel Quality. Compressor engine starts but runs rough.(GAS ENGINE)
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