1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 236Get this manual

1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 236

THUNDERBOLT IGNIT ON DESCRIPTION Thund erbo lt Igni ti on is capaci tan ce disc ha rge bre ak rless sy ternA rotating metal
battery terminlh ball ry abl connector 10 cbeck polari ly ll 'ice PI' cedur in th in th following inrormati n ord th e, are
li d THUNDERBOLT IGNITION CHECKS CHECKING THUNDERBOLT IGNITION SYSTEM se process elimination when cbecking systemcompon part
of ys te cann ot be with ty pe of test quipment used on conventional syste msFollow in parts are require to check ignition
checke igniti system: 2Che ck cond tion ext erna ins lat orIf in lator is c rackere lace plug 3Ch ec depth of center elec
tf od as sho-n in Figu 1If electr ode is burn ed ck more th 1, 32".8mm) , r place plug 1T igge sem ly _Igni ion coil sem
ly 3Switch box as mbl 4 'oltmeter (capable of reading a-IS volts or more) 5hart jumper lead nd an ohmme ter also re req ired
4Crac ks which may be found round in tern al insulator (e lec trode nd) wi II ot ha rm pl ug ope ra io na nd lug CHECKING