Mercury Racing 500R - Page 136

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Demand ‑ the final demand value requested by the software. If the
engine is propped correctly, with engine speed at wide‑open throttle
falling within the operating range at optimum trim, this value should be
at 100%.
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3. Run the engine with the handle at wide‑open throttle (100%
DemandLinear) at optimum trim. Use the following chart to aid in final
propeller selection.
Scenario
Engine Speed
# Description
<5,800
RPM
At or Just
Above
5,800
RPM
Within
Operating
Range
At or Just
Below
6,400
RPM
>6,400
RPM
1
DemandLinear
= 100%
DemandLinear
with Guardian
= 100%
Demand =
100%
Decrease
propeller
pitch until
engine
speed
falls within
operating
range.
Consider
a slightly
lower
pitch
propeller.
(See
NOTE 1.)
No
change
needed.
Consider
a slightly
higher
pitch
propeller.
(See
NOTE 2
and 3.)
N/A
2
DemandLinear
= 100%
DemandLinear
with Guardian
= 100%
Demand <
100%
N/A N/A N/A N/A
Increase
propeller
pitch until
engine
speed
falls
within
operating
range.
3
DemandLinear
< 100% with
throttle lever at
max
Adjust throttle cable or reconfigure DTS handle so that
100% DemandLinear can be reached.
MAINTENANCE
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