Suzuki outboard motors 1988 2003 repair manual., Page 35Get this manual
MAINTENANCE 3-19 If the correct gap cannot be obtained by adjustment, the points should be replacedIDLE SPEED
ISee Figure 49
1Mount the engine in test tank or move the boat to body of water2Remove the cowling and connect tachometer to the powerhead3Start the engine and allow it to reach operating temperature4Check idle speed and compare it with the specified idle speed in the "Tune-up pecifications" chart' 5If adjustment is necessary, rotate the idle adjustment screw on the carburetor until the powerhead idles at the required rpm5Ignition timing is about: 7'BTDC at 1000 rpm and 24-25'BTDC at 5000 rpmFor more details, please refer to the Tune-up Specifications chart6Timing cannot be adjustedIf timing is incorrect, fault has occurred in the CDI system and test of the CDI unit needs to be performedIDLE SPEED
See Figure 51
1Mount the engine in test tank or move the boat to body of water2Remove the cowlina and connect tachometer to the oowerhead3Start the engine and allow it to warm to operating temperature4Turn the air screw (1) in until it lightly seats and then back it out graduallyThe engine will pick up speed correspondingly and then cease to riseSet the air screw slightly before this pointSee the "Idle Air Screw Specifications" chart for the base setting5Shift the clutch into the forward position6Run the throttle stop screw (2) in and out until the correct engine speed is reachedIdle speed specifications are located in the "Tune-up Specifications" chart1Idle Fig49 To raise or lower the idle, turn the throttle stop screw 1A w
IGNITION TIMING
+ See Figure 50