Mercury Marine 90-850416009 Outboard Motor User Manual


 
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THEY NEVER CEASE TO AMAZE
This line of trusty Mercury FourStrokes offers
advanced features that keep the good times going.
Exclusive dual-water gearcase intakes provide
a constant supply of cooling water to decrease
exhaust temperature and protect gearcase seals.
Manual recoil starting comes standard. So even
if your battery quits, you can start up and get
home safely.
ACTION-PACKED
We put the “fun” in functionality with these
feature-rich outboards.
15-amp, 186-watt alternator delivers
on-demand battery charging and power for
electronics and lights.
Available power trim and tilt make it easy
to optimize the performance of your boat.
Automatic decompression reduces cylinder
pressure, so pull-starting the engine isn’t
a pain.
For ultimate shallow-water maneuverability,
Mercury offers a 25 hp Jet model.
A quiet companion.
Honda 25 hp is up to 58% louder
at idle than Mercury 25 hp FourStroke.
Integrated idle-relief silencer reduces engine noise
at low speeds.
Through-prop exhaust delivers quieter operation.
Tuned cowl induction helps achieve best-in-class
noise reduction.
30 hp EFI
25 hp EFI
WHY BUY
AN EFI
ENJOY THE
SILENT TREATMENT
24
PERFORMANCE
YOU CAN COUNT ON
Mercury Marine Engineering Dept. – November 2004. Test conducted on a Mercury 25 hp FourStroke and a Honda 25 hp four-stroke.
Go to MercuryMarine.com
For head-to-head engine tests,
boater interviews and other videos,
SEE WHAT MAKES MERCURY FOURSTROKES SUCH A POPULAR SOURCE OF RECREATIONAL POWER
HONDA
Engine Type: In-line 3 32.1 cu in (526 cc)
Weight: 172 lb (78 kg)(30), 157 lb (71 kg)(25)
Steering: Remote or tiller
Warranty:
Three-year limited, nondeclining factory-backed
Induction: 2-valve single overhead cam design
Shaft Length: 15" (381 mm), 20" (508 mm)
CARBStar Rating:
3
30 hp EFI 25 hp EFI
Complete coverage.
Every Mercury outboard comes with a three-year
limited, factory-backed nondeclining warranty and a three-year limited corrosion
failure warranty (excluding Mercury Racing and two-stroke outboards).
We’re everywhere.
Mercury has the largest marine dealer
network in the world. No matter where you are, you always have
trained Mercury technicians close by for expert service and support.
EFFORTLESS
OPERATION
For info on our
25 hp EFI FourStroke
Jet model see page 31.
Get an edge with EFI. Mercury Electronic Fuel
Injection (EFI) system
uses an Electronic Control
Module (ECM) to time, meter and inject fuel into the
engine delivering consistent surefire starting, increased
fuel economy and better overall performance.
Electric-start system ensures consistent surefire
starting regardless of conditions.
Precise electronic control of fuel flow drastically
improves efficiency.
ECM regulates fuel flow throughout the rpm range
for smooth, consistent running and better overall
performance.
The first battery-free, manual-start EFI engines
in the category.
Nice and easy.
Mercury FourStrokes are designed with
a boatload of user-friendly features
.
All-in-one multifunction tiller handle gives you easy, one-
handed shifting, stopping, steering, throttle, tilt and start.
Available with gas assist or power trim to maximize your
boat’s performance.
BETTER
FUEL ECONOMY
PERFORMANCEINSTANT
STARTING
CONVENIENT
YET CLEVER
24
User-friendly features
for unlimited boating fun