ADJUSTMENTS
TRIM ANGLE ADJUSTMENT
To help maintain steering stability and good performance, always maintain the proper trim angle as shown in the illustration. The appropriate trim angle varies depending on the combination of the boat, engine, and propeller, as well as operating conditions.
Make a test run in the boat to determine if the trim angle needs to be adjusted.
To adjust the trim angle:
- Lock the motor in the fully tilted up position.
(Refer to the TILT UP LOCK ARM section.)
- Turn the lock nut 1 counterclockwise while holding the nut (2). Loosen the nut (2).
- Pull the spacer (3) and tilt pin (4) out to the limit on both sides of the swivel bracket.
Reposition the tilt pin in the desired holes.
Push the spacer (3) and tilt pin (4) back in and tighten the nut (2) and locknut (1).
Lower the motor back down.
To lower the bow, move the pin towards the boat. To raise the bow, move the pin away from the boat.
After you have made an adjustment to the trim angle, make another test run to make sure you have adjusted it to the correct angle.
Trim angle greatly affects steering stability. If the trim angle is too small, the boat may “plow” or “bow steer”. If the trim angle is too large, the boat may “chine walk” from side to side or “porpoise” up and down. These conditions, which result in loss of steering control, can cause occupants to be thrown overboard.
Always maintain proper trim angle based on the combination of your boat, engine, and propeller, as well as operating conditions.
If you operate the motor with the tilt pin removed, you may not be able to control steering as expected.
Do not operate the motor with the tilt pin removed.
STEERING TENSION ADJUSTMENT
The steering on your outboard motor should be smooth and not tight. Adjust the steering tension so that there is only a slight resistance to steering movement. To increase the steering tension, turn the steering tension adjuster (A) clockwise. To decrease the steering tension, turn the steering tension adjuster counterclockwise.
THROTTLE TENSION ADJUSTMENT
The tension of the throttle control grip can be adjusted according to your preference. To increase the tension, turn the throttle tension adjuster (A) clockwise. To decrease the tension, turn the adjuster counterclockwise.
IDLE SPEED ADJUSTMENT
The idle speed of your outboard motor has been set by your dealer. If it is necessary to adjust the idle speed, use the following procedure:
The part of motor cover on DF2.5 is used as the holder of recoil starter grip, too. Idle speed adjustment is recommended to be made by the Suzuki authorized dealer. The motor cover can not be completely removed unless you first remove the starter grip. Please refer to the steps mentioned below.
Slightly remove the motor cover.
Tie a knot in the rope inside of the motor cover, in order to prevent the rope binding onto the recoil reel when the starter grip is off.
Take off the starter grip.
Completely remove the motor cover.
Install the starter grip to the end of rope.
Loosen a knot in the rope.
Start the engine. (Refer to starting the engine section)
Warm up the engine for about 5 minutes.
Make sure that the motor is in “NEUTRAL” and the throttle control grip is fully closed.
Turn the idle adjustment screw (A) clockwise to increase idle speed or counterclockwise to decrease idle speed.
Stop the engine.
| Idle speed (in Neutral) |
1800 – 2000 r/min. (min–1) |
- Reinstall the motor cover by the opposite steps of the above 1 to 6.
If idle speed cannot be set within the specified range, contact your authorized Suzuki Marine
Dealer.