Chrysler 100, 115 and 140 HP Outboard Motors Service Manual, OB 3439, Page 47Get this manual
IDLE ADJUSTMENT CAUTION Do not force idle adjustment screw or the tip will be damaged 1Turn idle adjustment screws clockwise until they seat in carburetorFigure 81 8TH TURN (WAIT 10 SEC
1 8TH TURN UNTIL ENGINE POPS
Figure 9(Finding) Lean Setting
6Turn idle adjustment screw counterclockwise to original position7Rich SettingTurn idle adjustment screw counterclockwise 1 turn at timewith periods of at least ten (10) seconds between each adjustment until the engine begins to roll or gallop from the rich fuel setting
Make note of this settingFigure 8Idle Adjustment Screw(100 H.PShown)
8Turn idle adjustment screw to midpoint between the settings noted in steps and 6Figure 10
2Open idle adjustment screws one (1) turn counterclockwise3Shift engine to neutral and start motorAllow engine to warm up to operating temperature4Shift engine into forward gear Throttle engine back to lowest reliable settingCORRECT ADJUSTMENT MIDPOINT