Fuel Economy; Twin-Engine Speed Synchronizer - Yamaha Z250 Owner's Manual

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Fuel economy

This gauge displays the distance per liter or
gallon when cruising, and is only for refer-
ence use by the operator.
Press the " " (mode) button repeatedly
until the indicator on the face of the gauge
points to " " (economy).
NOTE:
If twin engines are installed on your boat, the
gauge will only display the total fuel economy
of both engines.
NOTE:
Fuel consumption varies greatly with boat
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design, weight, propeller used, engine trim
angle, sea conditions (including wind), and
throttle position. Fuel consumption also
varies slightly with the type of water (salt,
fresh, and contaminate levels), air temper-
ature and humidity, cleanliness of the boat
bottom, engine mounting height, skill of
the operator, and individual gasoline for-
mulation (winter or summer fuel and
amount of additives).
The Yamaha digital speedometer and fuel
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management meter calculates speed,
miles traveled, and fuel economy by water
movement at the stern of the boat. This
distance can vary greatly from the actual
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distance traveled because of water cur-
rents, sea swells, and the condition of the
water speed sensor (partially plugged or
damaged).
Individual engines may slightly vary in their
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fuel consumption due to manufacturing
variations. These variations can be even
greater if the engines are of different year
models. In addition, variations in propel-
lers, even of the same basic dimensions of
the same design, can also cause a slight
variation in fuel consumption.
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Twin-engine speed synchronizer

This gauge displays the difference in engine
speed (r/min) between the port and star-
board engines for reference purposes when
synchronizing the two engines' speeds.
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Press the "
until the indicator on the face of the gauge
points to "
Basic components
" (mode) button repeatedly
" (synchronizer).
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