Key West Boats 2015 176BR, Quick Manual And Schematics

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Fuel System
Tank
The 176BR and 186BR are equipped with a single, 40 Gallon, pressurized fuel tank. The tank is of Polyethylene construction and is
secured/insulated with foam during the construction of the boat. The tank in the 176BR is located between the forward end of the aft
casting deck and the aft end of the console. In the 186BR, the tank is located directly below the cockpit floor lid. There is a sending unit
installed in the tank. Inspection ports in the deck and console provide access to tank fittings. Both fuel system “breathes” through a carbon
canister located in the anchor locker that vents overboard through a vent on the starboard side of the hull.
Fuel Supply
There is a fuel pickup installed in the tank. The pickup incorporates a shut off valve along with an anti-siphon valve than can be accessed
through the in deck inspection plate under the leaning post. There is an on deck fuel fill located on the port side of the boat, just forward of
the console. Access to the fill is provided through an inspection port. The fuel fill also incorporates a vent that allows venting of the tank, It
is recommended that these connections be inspected annually.
The 176BR/186BR will come pre-rigged from the factory with an engine matched fuel water separator. The fuel water separator is
installed in the bilge and accessed through the bilge access hatch. The Fuel Water separator should be checked periodically to ensure the
fuel is free of water. Fuel should be disposed of in an approved waste collection device when servicing/replacing. The filter must be filled
with fuel after servicing/replacing them in order to prime the engine. A primer bulb for the engine is located in the engine splash well. It is
used to prime the engine and system before starting the engine. This should be done after service or after periods of downtime for the
boat. When fueling your boat, whether on trailer or at a marina, the pressurized system will prevent overfilling. Any blockage of the vent
and or vent line will prematurely trigger the shut off on the fuel nozzle and will prevent you from filling the tank completely. It is
recommended to inspect your fuel system annually to ensure that all hose fittings are secured and the lines are free of any kinks. All
components of the 176BR and 186BR fuel systems are approved for use with ethanol blended fuels up to 10%. E85 fuel should never be
used. Key West recommends using non ethanol fuels whenever possible to reduce the risk of moisture retention in the fuel system,
especially in areas of high heat/humidity.
Due to the emission requirements of the EPA, certified fuel tanks and systems will not fill to the top of the tank. Instead, there will be a
ullage in the top 10% of the tank. The specified capacity of the tank accounts for this ullage when the tank is static and level. Therefore, it
is important to make sure the boat is as level as possible when filling the tank. Any forward or aft tilt will cause fuel to collect in one end of
the tank and prematurely reach either the forward or aft tank vent. When fuel reaches these vents, it triggers the shut off. When the boat is
level, fuel will reach these vents at the same time and allow the maximum quantity of fuel into the tank. The tanks ullage will also affect
your fuel gauge as the tanks sending unit will not reach the top of the tank, even when the tank is filled. This will cause the fuel gauge to
not read full, even though it is. Do not rely on the fuel gauge exclusively as variations will occur.