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9. Clean the filter holder, fill the new filter cartridge with clean fuel, coat the packing surface thinly with oil,
then install to the filter holder.
• When adding fuel, do not remove cap (B). Always add fuel
from the 8 small holes (A) on the dirty side.
• After adding fuel, remove cap (B) and install the fuel filter
cartridge.
• Always fill with clean fuel. Be careful not to let any dirt or
dust get into the fuel. In particular, center portion is the
clean side, so do not remove cap „B) when adding fuel. Be
careful not to let dirt or dust get into centre portion on
clean side.
10. When installing, tighten until the packing surface contacts the seal surface of the filter holder, then
tighten it 3/4 of a turn.
• If the filter cartridge is tightened too far, the packing will be damaged and this will lead to leakage of
fuel. If the filter cartridge is too loose, fuel will also leak from the packing, so always tighten the correct
amount.
• When tightening with a filter wrench, be extremely careful not to dent or damage the filter.
11. Check that the drain valve (2) is tightened securely.
12. Set valve (1) at the side of the fuel pre-filter cartridge to the
open position (O).
13. After completing the replacement of filter cartridge (4), bleed
air.
[PROCEDURE FOF BLEEDING AIR]
Bleed the air as follows:
1. Fill fuel tank with fuel (to the position where the float is at the
highest position).
2. Loosen the knob of feed pump (6), pull it out, and then pump it in
and out until the movement becomes heavy.
• It is not necessary to remove the plug at the top of the fuel
pre-filter and fuel main filter.
• After the engine runs out of fuel, use the same procedure to
operate feed pump (6) and bleed the air.
3. After finishing bleeding air, push in the knob of feed pump (6) and tighten it.
4. After replacing the filter cartridge, start the engine and run it at low idling for 10 minutes.
Check for leakage of fuel from the filter seal surface and transparent cap mounting. If any fuel is leaking,
check the tightening of the filter cartridge.
If there is still fuel leakage, remove the filter cartridge, and if any damage or embedded foreign material
in the packing surface is found, replace it with a new cartridge.
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