Owner's Manual DF25 V-TWIN Caution System

The caution systems are designed to alert you to certain situations which may cause damage to your outboard motor.

• Do not rely on the Caution System to alert you to any malfunction which may occur or to give you an indication of the need for maintenance. To prevent damage to your outboard motor, it is essential to regularly inspect and maintain it.
• If the caution lamp lights while you are operating your outboard motor, stop the motor as soon as possible and correct the problem or consult your authorized Suzuki Marine Dealer for assistance. Continuing to operate the motor with the lamp lit can result in severe motor damage.

To inform you that the caution lamp is working, it will come on for a few seconds after the engine starts. On the remote control model, the buzzer in the remote control box will also sound.

Make sure that the caution lamp comes on briefly once the engine starts, before turning OFF again. If the lamp does not come on, stop the engine and consult your dealer at once.
If the lamp remains lit while operating, check the engine oil level and add oil if necessary. If the oil level is correct, consult your authorized Suzuki Marine Dealer.

This system is activated when engine speed exceeds the maximum recommended speed for more than 10 seconds.

If this system activates, engine speed will automatically be reduced to approximately 3000 r/min. with the caution lamp lit.

This system must be reset by moving the throttle to the idle position for about one second to restore full engine operation.

The Over-Revolution Caution System will not be activated at recommended maximum throttle unless propeller pitch is insufficient or other factors (like “overtrimming” or “ventilation”) prevail.
If the system activates for no apparent reason, you should contact your authorized Suzuki Marine Dealer.

This system operates when the engine lubricating oil pressure drops below the correct pressure.

If this system activates, the caution lamp will light. On the remote control model, the buzzer in the remote control box will simultaneously begin a series of beeps. When this system is activated at 2000 r/min. or higher, engine speed will automatically be reduced to approximately 2000 r/min.

If this system activates when operating, stop the engine immediately, if wind and water conditions make it safe to do so.

Do not remove or install the motor cover while the engine is running. Stop the engine and remove the motor cover. Then check the oil level.

Check the oil level and add oil if necessary. If the oil level is correct, consult your authorized Suzuki Marine Dealer.

• If you operate the engine with the caution lamp lit, severe engine damage can result.
• Do not rely on the caution system to indicate the need to add oil. Be sure to periodically check the engine oil level.
If the oil level is low, severe engine damage can result.

This system is activated when the cylinder wall temperature is too high due to insufficient water cooling.

The cooling water caution system will not detect high combustion chamber temperature caused by, for example, an oil system malfunction, poor quality fuel, or spark plugs with an incorrect heat range.

If this system activates, the caution lamp will light. On the remote control model, the buzzer in the remote control box will simultaneously begin a series of beeps. When this system is activated at 2000 r/min. or higher, engine speed will automatically be reduced to approximately 2000 r/min.

If the cooling water caution system activates when operating, reduce engine speed immediately and check to see if water is being discharged from the pilot water hole. If no water is seen, follow the procedures outlined below.

Water and wind conditions permitting, stop the motor, tilt it out of the water and remove any debris like seaweed, plastic bags or sand that may have blocked the water intakes.
Lower the motor into the water, being sure that water intakes are immersed, and restart it.

Check (A) that water discharges from the pilot hole and (B) that the caution lamp is no longer lit.

Be aware that the caution lamp may light again if engine temperature rises abnormally. If either of the above situations arises, your authorized Suzuki Marine Dealer must be consulted as soon as possible.

If pilot hole water discharge is sufficient, the caution lamp (and buzzer) may still operate until engine temperature decreases. Run the engine in NEUTRAL only until the caution systems are cancelled.

• Wind and water conditions permitting, stop the engine if the caution lamp lights. Inspect the engine according to the above instructions. Consult your authorized Suzuki Marine Dealer if you cannot correct the problem. Continuing to operate with the caution lamp lit can result in severe engine damage.
• Remember that the cooling water caution system cannot detect overheating caused by, for example, an oil system malfunction, poor quality fuel, or incorrect spark plugs.

If the engine is operated beyond the maximum trim position, the water intake holes may be above the water line. In this situation, the cooling water caution system may activate.