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Message: <blockquote data-quote="Pappy" data-source="post: 498506" data-attributes="member: 3278">Why not check available spark at cranking RPM first? The fact that it eventually starts and runs well tells me to look elsewhere. You should have  around 3/8" spark available. 1/4" minimum. Check that real quick and that will tell you if it is spark or fuel? If you have a primer system pull your primer hoses at the  carb fittings, Squeeze your bulb until tight then turn the key on and push the key switch in and check fuel delivery out of your primer lines. If good there then take one of your primer lines and  check all three primer fittings by installing the line on the fitting and blowing through the line. All three should be difficult to blow through but not plugged up. Check your red manual valve on the pimer solenoid to see if it is cracked at this time as well. Replace as necessary.If carbureted check the choke blades to see if they FULLY shut, not almost all the way! If not then make an adjustment and  check again. They have to fully shut to pull enough fuel fast enough to supply the engine with fuel to start. </blockquote>