Chrysler 25 and 30 HP Outboard Motors Service Manual OB 1894, Page 13Get this manual
SECTION IV (Cont GInsert paper lightly between cam and roller from top side and then from bottom side noting gap between edge of paper and mark on throttle camIf gaps are equal, mark on cam is at center of contact with rollerSee figure 3
Figure -Idle Adjustment Screw Figure Checking Throttle Pick-Up Point
HReplace throttle link and rotate magneto until nylon throttle stop on stator ring is against cylinderCheck to see if wide-open throttle (WOT) mark on cam is at center of contact of nylon rollerRemove throttle link from magneto control lever, loosen jam nut, then turn end of link to lengthen or shorten link until above condition is metTighten stop nut on linkIWhen magneto is at WOT and WOT mark on cam is at center of contact of roller, throttle shutter should be horizontalIf this is not the case, pick-up point is incorrectrepeat steps A-H