Owner's Manual DF250AP, DF300AP Inspection And Maintenance [Engine Oil Filter]

If you add diluted sulphuric acid to the battery after it has been initially serviced, you will damage the battery.
NEVER add diluted sulphuric acid to the battery after it has been initially serviced. Follow the battery manufacturer’s instructions for specific maintenance procedures.

The engine oil filter must be changed by authorized Suzuki Marine Dealer periodically.

Replace engine oil filter with a new one at initial 20 hours (1 month).

Replace engine oil filter with a new one at every 200 hours (12 months).

After operation in muddy, brackish, or salt water, you should flush the water passages and motor surface with clean, fresh water.
If you do not flush the water passages, salt can corrode the motor and shorten its life. Flush the water passages as follows.

ENGINE RUNNING – Vertical position –

Suzuki recommends that you flush the water passage by using this method.

To flush the water passages, you must obtain a commercially available engine flush device.

Exhaust gas contains carbon monoxide, a dangerous gas that is difficult to detect because it is colorless and odorless. Breathing carbon monoxide can cause death or severe injury.
Never start the engine or let it run indoors or where there is little or no ventilation.

Failure to take proper precautions when flushing the water passages can be hazardous.
When flushing the water passages, always take the following precautions:
● Make sure that the engine remains in NEUTRAL. If shifted into gear, the propeller shaft will turn and could cause severe personal injury.
● Make sure the motor is properly clamped to a secure stand or boat, and remain in attendance until flushing is completed.
● Keep children and pets away from the area, and stay clear of all moving parts.