Section 3 - On the Water
Page 26 90-8M0069751 eng APRIL 2012
Mercury Diesel engines must be used in applications that meet the operation specifications indicated by a Mercury Diesel
product application engineer. The power package must be equipped with a gear ratio and propeller that allows the engine to
operate at wide open throttle (WOT) at the engine's rated speed (RPM). Use of Mercury Diesel engines in applications that do
not meet specified operational parameters is not approved.
High‑Output Rating
A High‑Output Rating applies to variable load applications where full power is limited to one (1) hour out of every eight (8)
hours of operation. Reduced power operation must be at or below cruise speed (RPM). Cruise speed is dependant on the
engine's maximum rated speed (RPM):
Reduced Power Operation
Rated Speed (RPM)
Cruise Speed (RPM)
Reduction from Rated Speed (RPM)
3501–4500 RPM 400 RPM
This rating is for pleasure (non‑revenue generating) applications that operate 500 hours or less per year.
Operation Chart
Starting Procedure
After Starting While Underway Stopping and Shut Down
Open the engine hatch and
completely ventilate the bilge.
Monitor instrumentation to
confirm normal engine
operation.
If not normal, stop the
engine.
Monitor instrumentation to
confirm normal engine
operation.
Shift the remote control lever
to the neutral position.
Turn the battery switch on, if
equipped.
Check for fuel, oil, water,
fluid, and exhaust leaks, etc.
Listen for the audio alarm.
Run the engine at idle‑RPM
for several minutes to allow
the turbocharger and engine
to cool.
Turn on and run the engine
compartment bilge blower, if
equipped, for 5 minutes.
Check shift and throttle
control operation.
Turn the key switch to "OFF"
position.
Check for leaks: fuel, oil,
water, fluid, etc.
Check steering operation.
Turn the battery switch off, if
equipped.
Open the fuel shut‑off valve,
if equipped.
Close the fuel shut‑off valve,
if equipped.
Open the seacock, if
equipped.
Close the seacock, if
equipped.
Prime the fuel injection
system, if necessary.
Flush the seawater cooling
system if operating in
saltwater, brackish, or
polluted water.
• Turn the key switch to
"START" position and
release. OR
• Turn the key switch to
the "RUN" position then
depress and release the
start/stop switch, if
equipped.
Warm‑up the engine at a fast
idle‑RPM for several minutes.
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