QuestionQUESTION: If I Set the Coil Closer to the Flywheel will this Increases the Current that goes to the Spark Plug, which makes the Plug have a Blue Spark (Hot)or a Lighter Orange/Red Spark (Cold)?
Thanks,
Rick
ANSWER: The amount of spark generated if a function of the primary to secondary coil windings. There may be a slight performance gain in setting a different gap but for most applications you will never tell a difference. We used to build racing cart engines and we rarely ever noticed any increase on the dynometer. As for the color of the spark, there are many things that impact the color including the composition of air and other environmental factors. I have studied the subject some and combined with real world application the color of the spark is neglagible.
Are you running alcohal on a racing type application?
Eric
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QUESTION: Thanks for your reply Eric,
No to your question. The problem I'm having is I'm working on my kids go-kart and we had a bad carb. So we replaced it with a new one and it was running fine until the weld on the seat broke and fell into the spark plug and broke it. We replaced the plug with new and set the gap .030 but we were not getting spark. So we bought new coil (armature# and set the air gap at 0.010. We get a orange spark now but before #spark plug broke) we was getting a nice blue spark. Now we can't get it to crank. Checked flywheel key and it was good, just can't get it to crank now. Any suggestions? Am I missing something? Carb is new, Armature is new, don't want to spend more money now. Thanks for any help. Rick
ANSWER: I have had brand new spark plugs right out of the box fail. Have you tried another plug? Is the spark plug damp with gas? Is the gas less than 30 days old? Bad fuel is the number one reason engines fail to start.
Let me know if the gas is good.
Eric
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QUESTION: I tried another spark plug but both i tried were cross reference plugs. The gas is a week old now was new at time of all this. The plug maybe damp from gas I will have to check it out. This is not making a whole lot of sense. I was thinking of trying a spit end spark plug (extra spark) what do you think? Thanks,
Rick
AnswerDoes the engine feel like it has compression? I have seen valves stick open, mainly on OHV engines, where you would have spark and fuel but no compression.
How did you check the spark? I have had one ignition module where the spark would jump the spark plug gap but when testing with an inline ignition tester the coil would not produce spark. Rare, but it can happen.
If you have spark, good fuel, compression and the flywheel key is not sheared then the engine should run.
Does the enigne pop or anything else indicating it wants to start?
Eric
