What causes yellow spark?

What causes yellow spark? And how do you fix it (make it blue again)?


Re: What causes yellow spark?

POINTS too corroded,bad coil wire connection or spark plug wire,bad coil,spark plug carbon tracking,weak magneto magnets,dirty magneto magnets or improper gap between magnets and coils,IMPROPER TIMING,bad contact at ignition switch or kill switch.And SOME `peds have some sort of resistor in the spark plug boot that can fail and weaken or kill spark.I'm guessing points need filed and gapped or replaced,though.

Re: What causes yellow spark?

brown sunglasses ?

a partly fouled spark plug is probably the number one reason

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