1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 235Get this manual

1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 235

NOTE: IVa1 cylinder is cylinder nearest transom2Connect 12-volt lest lamp or voltmeter be twe en is tributor primary lead
is cylinder nearest transomRefer toSpecifications, Section 82Connect power upply leads on timing light to battery 3tarL engine
and fu 650 RPM 4Aim timing light at timi ng ma rk on timing chai cover 5Loosen di.stri hutor hold-down clamp and turn distribu
tor in either direction required until timin mark on alternalor flywheel aligns with mark on housing(F igure 7) 6Tigh ten
dist ribu tor ho ld-down clam and recheck alignment of timing marks top engine and remove timing lightI F igure 7li ing-Up