Kill switch is not on. Have good spark on new spark plug. Have good gas in tank. This saw has very few hours on it. Tried priming carb., tried priming cylinder.. match will ignite fuel and it works in other saw fine. Could exhaust be causing problem? Or air mixture?
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You are correct, you have a flywheel with magnets in, an electronic ignition unit which when the magnets pass the ignition unit core at speed energises and creates a spark via the plug, the earth wire simply takes the unit to ground and shuts off the spark, the unit you changed was it definetly an electronic unit or just a coil? if electronic and you are cranking the engine fast enough and have the plug well earted against the cylinder with the earth wire not connected it should spark.
Often the cause is a failed fuel pump diaphram. Rebuild the carb... kits about $20. The diaphram works from engine vacuum pulses. Also the little flap type check valves go bad... the ethanol in gas doesn't help this problem...
if you have a good compression,a strong enough blue spark and carburetion for the fuel air mixture try priming the engine(put small amount of gas in the spark plug hole)then start the engine.If the engine runs only the gas you put inside the cilinder there is a carburetion problem to find and fix.
let me know regards savumihai71
Prime away... on a chainsaw it does NOT squirt fuel into carb. It draws fuel from tank, through carb, and returns it to tank.
Using the choke however will flood it in a second once it has fired. with a good fuel supply, 99.5 % of chainsaw won't start problems are flooded. Lou
Have you checked the spark at the spark plugs?
How this is done is take a spare spark plug that is known to be good. Pull the spark plug boot off and install the spare plug in the boot and lay it on part of the engine to get a ground. Know try and start the bike and see if there is any spark coming from the spare plug. Do this to every plug and remember to put the cap back on the plug after you test that plug. If there is spark then that rule out ignition. Now check out the fuel delivery. You say you have a couple gallons of gas in the tank. That's good!
1st check the petcock and make sure that it is not plugged buy removing the fuel line and putting it on PRI setting. This means Priming the carbs or injectors with gas. If that is OK put the line back on and check the fuel filter witch should be under the gas tank and see if it is plugged. 2nd check the fuel pump to see if it is working. How to test this is remove the fuel line from the pump that goes to the carb or injector and turn the bike on but do not try to start. The pump should squirt gas out as you turn the key on. If it checks out OK then it has to be something with the carbs/injectors. Just got to try a process of aliamation. Just remember Air-Fuel-Spark=Bang. Hope this helps out. Please let me know how it works out.
Drain the fuel tank, look inside the tank to ensure that the fuel line inside still has a fuel filter attached to it. Look at the on/off switch ensure that both the wires are still attached to the switch securely. Check that the plug still has spark, if unsure replace the plug. Check the air filter to ensure that it is clean. Mix the gas 50:1.
IF you have a battery get a new one ; put in new gas ; super; dsid you ajest any screws on carb. You tight need to run a prime tank right to your carb to prime it; and then hook your tank backup new gas lines to your carb. Now break out with the WD40 to spray all switches for rust.