Owner's Manual DF20A, DF15A, DF9.9B Battery Charge Cutout System (Df9.9Be_15Ae_20Ae)

This system activates when the battery voltage drops to less than 6 volts while the engine is running.

The battery charging circuit is open while the system is activated.

All the charging current from the rectifier/regulator is then used to power the engine control system.

● Charging current will not flow from the rectifier/regulator to the battery while this system is activated.
● When the system is activated the starter motor will not operate because the battery voltage is too low.

Check the battery condition and re-charge the battery it necessary.

Failure to take proper precautions when inspecting or servicing the battery can be hazardous.
Do not attempt to inspect or service the battery without first reading the warnings, cautions, and instructions in the “BATTERY INSTALLATION" section of this manual.

PROPELLER SELECTION

It is essential to use a propeller on your out-board motor that is properly matched to your boat’s operating characteristics The speed of the engine when you operate your boat at full throttle depends on the propeller you use. Excessive\ engine speed can seriously damage the motor. while low engine speed at full throttle will adversely affect the performance. Your operating load will also affect propeller selection. Smaller loads generally require larger-pitch propellers; larger loads generally require smaller-pitch propellers. Your authorized Suzuki Marine Dealer will assist you in selecting a suitable propeller for your boat.

Installing a propeller with either too much or too little pitch will cause incorrect maximum engine speed, which may result in severe damage to the motor.
Ask your authorized Suzuki marine dealer to assist you in selecting a suitable propeller for your boat.

You can determine if your propeller is appropriate for use with your boat by using a tachometer to measure engine speed when operating your boat at full throttle, under minimum load conditions. If you are using an appropriate propeller, the engine speed will be within the following range:

If the engine speed is not within this range, consult your authorized Suzuki Marine Dealer to determine which propeller size is best for you.

If you change propellers, be sure to perform the above check again, to confirm that the engine speed under full throttle is within the specified range.