Evinrude 25 ETEC Specifications
| Engine Model: Evinrude E-TEC 25 |
| Engine Type: 2-stroke 2-cylinder gasoline outboard engine |
| Total Displacement: 35.2 cu.in (577 cc) |
| Rated Engine Power: 25 Hp (18.5 kW) at 6000 rpm |
| Fuel System: Direct fuel injection (DFI) |
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The Evinrude 25 ETEC is a technologically
advanced outboard recognized for its impressive power-to-weight ratio,
innovative direct injection system, and remarkable fuel efficiency. It
is engineered to deliver instant throttle response and strong torque
characteristics befitting its two-stroke heritage while meeting
stringent emissions standards. Owners benefit from an industry-leading
maintenance schedule requiring no dealer-scheduled service for the first
three years or 300 hours of normal recreational use.
The engine's inline two-cylinder configuration contributes to a compact
profile, and the wide range of model configurations includes options for
tiller or remote steering, manual or power trim, and rope or electric
starting. Whether powering small fishing boats, inflatables, or
auxiliary applications, this engine combines modern technology with
proven durability to elevate the boating experience.
The Evinrude E-TEC 25 is built around an inline two-cylinder powerhead
utilizing advanced E-TEC direct fuel injection. This system is managed
by a sophisticated Engine Management Module (EMM) that continuously
monitors and optimizes fuel delivery, ignition timing, and lubrication
for peak performance across the entire RPM range.
The engine is available in numerous model configurations to suit diverse
applications, including E25DRS, E25DRG, E25DRSL, E25DRGL, E25DGEL,
E25DGTE, E25TESL, E25GTEL, E25DTSL, E25DGTL, E25DPSL, and E25DPGL
models.
Power: 25 HP at the propeller
Engine Type: 2-Stroke Inline 2-Cylinder E-TEC Direct Injection
Displacement: 35.2 cu in (577 cc) 1.0 L
Bore x Stroke: 2.992 in x 2.5 in (76 mm x 64 mm)
Full Throttle RPM Range: 5500-6000 RPM
Fuel Induction System: E-TEC Direct Injection with stratified low RPM
combustion mode
Alternator Output: 56 Amps Total Output / 15 Amps Net Dedicated
Starting System: Rope start available on E25DRS, E25DRG, E25DRSL,
E25DRGL; Electric start available on remaining models
Controls: Mechanical
Steering (E25DRS, E25DRG, E25DRSL, E25DRGL, E25DGTE, E25TESL, E25GTEL,
E25DTSL, E25DGTL): Tiller Handle
Steering (E25DGEL, E25DPSL, E25DPGL): Remote
Gear Ratio: 2.15:1
Emissions Compliance: CARB 3-Star rated, EPA and EU compliant
The powerhead of the Evinrude E-TEC 25 features an inline two-cylinder
block cast from high-strength, corrosion-resistant materials. The
cylinder bore measures 2.992 inches (76 mm), and the piston stroke is
2.5 inches (64 mm), contributing to the engine's 35.2 cubic inch (577
cc) displacement. As a two-stroke engine, it utilizes a reed valve
induction system.
These one-way valves are located in the intake manifold and control the
air-fuel mixture entering the crankcase. The system is simple, reliable,
and allows for high volumetric efficiency. Pistons are manufactured from
a high-strength NASA alloy material, providing exceptional durability
and heat resistance. The engine features 195 fewer parts than a
comparable four-stroke engine, eliminating valves, belts, camshafts, and
pulleys that require adjustment or replacement.
The fuel system is centered around Evinrude's advanced E-TEC direct
injection technology. High-pressure fuel injectors, precisely controlled
by the EMM, deliver a finely atomized fuel spray directly into the
combustion chambers. The engine management system makes more than eight
million calculations per second to deliver the precise amount of fuel
required at any given RPM.
At low RPM, the engine operates in a stratified combustion mode,
creating a controlled fuel cloud near the spark plug for exceptional
fuel economy, reduced emissions, and idle smoothness. The engine is
designed to operate on standard 87 octane unleaded gasoline. Fuel
injectors are critical components requiring precise installation with a
torque specification of 22 to 23.5 lb-ft.
Lubrication is managed by a sophisticated multi-point targeted oiling
system. An electric oil pump, controlled by the EMM, draws oil from the
integral tank and injects it directly onto critical engine components
including main bearings, connecting rod bearings, and cylinder walls
based on real-time engine speed and load demands. This system ensures
precise lubrication while minimizing oil consumption and emissions.
An on-engine oil tank with a capacity of 1.7 quarts (1.6 L) is standard.
The recommended lubricant is Evinrude/Johnson XD-100 oil, a fully
synthetic oil specifically formulated for E-TEC engines to maximize
performance and reduce carbon deposits. The system eliminates the need
for oil changes, oil filters, and the disposal of used crankcase oil.
The cooling system is a pressure and temperature-controlled water-cooled
design. A high-capacity water pump in the lower unit circulates water
through extensive water jackets in the cylinder block and cylinder head.
The system uses a two-stage design controlled by thermostats and a
pressure valve to maintain optimal operating temperature across all
engine speeds. At low engine speeds, thermostats regulate water flow,
opening fully as the engine reaches operating temperature.
As engine speed increases, water pressure opens a relief valve, allowing
high-flow water circulation to provide enhanced cooling during
high-speed operation. The EMM continuously monitors engine temperature
and will activate the S.A.F.E. (Speed Adjusting Friction Elimination)
warning system to reduce RPM and protect the engine if an overheat
condition is detected.
| Mid Section and Lower Unit |
The mid-section houses the driveshaft and exhaust tube, connecting the
powerhead to the lower unit. It is designed for robust performance and
features extensive corrosion-resistant coatings. The lower unit contains
the gearcase with a 2.15:1 reduction ratio and a heavy-duty water pump
assembly.
The gearcase is oversized and robust for durability in this Hp class.
The gearcase is filled with high-performance lubricant and features a
F-N-R shifting mechanism. The exhaust is routed through the propeller
hub.
The Evinrude E-TEC 25 is available with either manual tilt or power trim
and tilt depending on model selection. Models with power trim and tilt
include E25DRS, E25DRG, E25DRSL, E25DRGL, E25DGEL, E25DGTE, E25TESL, and
E25GTEL. Models with manual tilt include E25DTSL, E25DGTL, E25DPSL, and
E25DPGL. The power trim and tilt hydraulic system allows the operator to
adjust the engine angle for optimal boat performance, acceleration, and
shallow-water operation. The trim range is from -4 deg to +16 deg,
providing precise adjustment of the boat's running attitude.
The tilt range extends to 65 deg, offering ample clearance for beaching,
launching, or trailering. The tiller handle incorporates a trim and tilt
switch at the end of the twist grip that can be operated without moving
the hand. The manual release valve must be torqued to 45 to 55 lb-in (5
to 6 Nm) when closed. Trim/tilt motor screws require 35 to 52 lb-in (4
to 6 Nm). The tilt tube nut must be torqued to 45 to 50 lb-ft (61 to 68
Nm).
Proper propeller selection is critical to allow the engine to operate
within its 5500-6000 RPM full-throttle range under normal load
conditions. The Evinrude 25 HP E-TEC utilizes propellers designed for
the 2.15:1 reduction ratio gearcase. The specific propeller selection
depends on boat type, intended use, and load conditions. The propeller
nut must be torqued to 70 to 80 lb-ft (95 to 109 Nm) for secure
installation.
Shaft Length Options:
- 15 in (381 mm) on E25DRS, E25DRG, E25DGTE
- 20 in (508 mm) on remaining models
Operating Weight:
- E25DRS/E25DRG: 150 lbs (68 kg)
- E25DRSL/E25DRGL: 154 lbs (70 kg)
- E25DGEL: 160 lbs (73 kg)
- E25DGTE: 162 lbs (74 kg)
- E25TESL/E25GTEL: 166 lbs (75 kg)
- E25DTSL/E25DGTL: 181 lbs (82 kg)
- E25DPSL/E25DPGL: 187 lbs (85 kg)
The Evinrude 25 E-TEC is engineered for minimal maintenance
requirements. A key benefit is no scheduled dealer maintenance required
for the first three years or 300 hours of normal recreational use. The
engine features an auto-winterization mode that simplifies long-term
storage, eliminating the need for manual fuel system treatment and
dealer involvement.
The EMM continuously monitors engine systems and stores fault codes for
diagnostic purposes. Recommended pre-launch checks include verifying oil
level in the on-engine reservoir and inspecting for any signs of damage
or corrosion. Routine maintenance items include periodic inspection of
sacrificial anodes.
The cooling system can be flushed using a garden hose and flushing
attachment. The S.A.F.E. system will activate to reduce engine speed if
an overheat condition or low oil pressure is detected. Advanced iridium
spark plugs feature a longer, more efficient spark and are designed for
3-year, 300-hour intervals.
Recommended Fuel: 87 Octane Unleaded
Recommended Oil: Evinrude/Johnson XD-100 Oil
Propeller Nut: 70 to 80 lb-ft (95 to 109 Nm)
Flywheel Nut: 100 to 110 lb-ft (135 to 150 Nm)
Tilt Tube Nut: 45 to 50 lb-ft (61 to 68 Nm)
Stator Screws: 84 to 106 lb-in (9.5 to 12 Nm)
Trim/Tilt Motor Screws: 35 to 52 lb-in (4 to 6 Nm)
Manual Release Valve: 45 to 55 lb-in (5 to 6 Nm)
Spark Plugs: 22 to 25 lb-ft (Do not exceed 30 lb-ft to avoid breaking)
Mounting Bolts/Nuts: 40 lb-ft (54 Nm)
Trim Tab Screw: 35 to 40 lb-ft (47 to 54 Nm)
Shift Rod Screw: 60 to 84 lb-in (7 to 9.5 Nm)
Starter Mounting Screws: 168 to 192 lb-in (19.0 to 21.7 Nm)
The Evinrude 25 E-TEC is a highly versatile powerplant suitable for a
broad spectrum of boat types and boating activities. It is an ideal
choice for 12 to 16-foot aluminum fishing boats, jon boats, and
inflatable craft, providing the power needed for rapid planing and
efficient cruising in inland and coastal waters. Its strong acceleration
and torque make it well-suited for small tiller-steered utility boats
and as auxiliary power for larger vessels.
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