the power of a new coil and boot!

Ja'Far Rogers /
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I replaced the 28yrd old coil and boot on the 505D with an NGK 5 kilo-Ohm coil and boot and earned a cool 3mph! And this is with the dirty and worn out spark plug, now to switch to a new plug. It does, however, backfire at idle every now and then not very often I need to advance the timing a bit.

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