Quicksilver 875SD Owner's Manual page 31

Quicksilver 875SD — System & Component Overview and Operation
Phase Separation
Humidity and condensation create water in your fuel tank which can adversely effect the ethanol
blended fuel. A condition called phase separation can occur if water is drawn into the fuel beyond the
saturation point. The presence for water in the fuel beyond the saturation level will cause most of the
ethanol in the fuel to separate from the bulk fuel and drop to the bottom of the tank, significantly
reducing the level of ethanol in the fuel mixture in the upper level (phase). If the lower level (phase),
consisting of water and ethanol, is deep enough to reach the fuel inlet, it could be pumped directly
into the engine(s) and cause significant problems. Engine problems can also result from the reduced
ethanol/fuel mixture left in the upper phase of the tank.
Additives
There is no practical additive known that can prevent or correct phase separation. The only solution is
to keep water from accumulating in the tank. If phase separation does occur, your only remedy is to
drain the fuel, clean and dry the tank completely and refill with a fresh, clean tank of fuel.
Fuel Filters
Mercury already provides the appropriate level of filtration to protect the engine from debris. The
addition of another in-line filter to the system will create a possible flow restriction that can starve the
engine of fuel. As a precaution, it is advisable to carry extra on-engine filters in case filter plugging
from debris becomes a problem during boating.
For vessels powered by L6 Verado(s), Mercury provides an approved, externally mounted fuel filter for
use in your boat. The filter is located above the petrol tank and can be accessed via the cockpit floor
TM
hatch. The filter can be connected to the SmartCraft instrumentation and will warn you when
maintenance is required. For more information, refer to the engine manufacturer's manual in your
owner's manual package.
Maintenance
Periodically inspect for the presence of water in the fuel tank. If any is found, all water must be
removed and the tank completely dried before refilling the tank with any fuel containing ethanol.
Storage
Long periods of storage and/or non-use, common to boats, create unique problems. When preparing
to store a boat for extended periods, of two months or more, it is best to completely remove all fuel
from the tank. If it is not possible to remove the fuel, maintaining a full tank of fuel with a fuel
stabilizer added to provide fuel stability and corrosion protection is recommended.
REFER TO THE ENGINE MANUFACTURER'S MANUAL IN YOUR OWNER'S MANUAL PACKAGE FOR
COMPLETE INSTRUCTIONS AND WARRANTY INFORMATION.
The use of fuels containing ethanol higher than 10 percent
E85 FUELS COULD SERIOUSLY DAMAGE YOUR ENGINE AND
(E-10) can damage your engine and/ or fuel system and will
MUST NEVER BE USED.
void the warranty.
Do not obstruct or modify the ventilation system.
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