1963-1973 Mercruiser all Engines and Drives Service Manual Books 1 and 2, Page 567Get this manual
Quality of the image is intentionally reduced!
DETERMINING UPPER DRIVE SHAFT PRELOAD .NO TE: orne mod J20-thru-888 dri shilf housings hove bellville wa.sll er under th cop cover bearing ra ce, which au.to ma tically rmines th dri ve shaft preloadT