1978 Polaris RXL Service Manual, Page 26Get this manual
SPA RK PLUGS {Con't
Th appea rance the firi ng end of your spark plugs ca rel ate you wh at is happen ing in the com bust ion chamber of your en gine in regard to fuel mixture and ignition Knowing ho to read and analyze you plugs will enable you mo re close ly tu ne your engineRefer to he chart showing spark plug appearance 1A norma pro per looking plug
should show the fo llowing: AInsulator ti tan or li ght brown
in color
BElectrodes eroded no burned or
Overheated plugs will show the following: AElectrodes burned BInsulato ip light gray or cha lk
white in co lor
'W'of tip rlll or
.ad Mn'1or
b,owllr_ Gllll' Oedrode, 1101 bUI " ClI
CCauses: 12345