Mercury 135 Verado Specifications
| Engine Model: Mercury Verado 135 |
| Engine Type: 4-stroke inline 4-cylinder DOHC 16-valve gasoline outboard engine |
| Total Displacement: 105.7 cu.in (1.7 L) |
| Rated Engine Power: 135 Hp (101 kW) at 6400 rpm |
| Fuel System: Sequential Multi-Point Electronic Fuel Injection (EFI) |
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The Mercury Verado 135 represents the entry
point into the revolutionary Verado family, bringing supercharged
performance and refinement to the 135 Hp class. This inline
four-cylinder engine delivers an automotive-like responsiveness and
remarkably smooth operation that redefines expectations for outboard
power in this range.
The supercharged induction with charge air cooling produces exceptional
torque throughout the entire rev range, providing awesome acceleration
and the ability to keep a heavily loaded boat on plane at slower speeds
while climbing larger waves with ease. The Advanced MidSection (AMS)
cradles the powerhead to virtually eliminate vibration during operation,
while Digital Throttle and Shift (DTS) delivers precise, instantaneous
response without the hesitation of mechanical cable systems.
With superior corrosion protection featuring Mercury's exclusive XK360
aluminium alloy and extensive use of stainless steel components, the
Verado 135 is engineered for durability in the most demanding marine
environments. Slightly smaller than its six-cylinder siblings yet still
spectacular, the Verado 135 delivers the premium Verado experience in a
compact, efficient package.
Power Output: 135 hp (101 kW) at the propshaft.
Full Throttle Operating Range: 5200-6400 RPM.
Displacement: 1.7 Liters, 1732 cc, 105.7 Cubic Inches (CID).
Engine Type: Inline 4-cylinder, Four-Stroke.
Valvetrain: 16-valve, Dual Overhead Camshaft (DOHC) configuration.
Bore and Stroke: 3.23 inches x 3.23 inches (82 mm x 82 mm).
Induction System: Supercharged with charge air cooling and electronic
boost pressure control.
Fuel System: Computer controlled Sequential Multi-Port Electronic Fuel
Injection (EFI).
Fuel Requirements: Regular Unleaded gasoline with minimum 90 RON octane
rating.
Ignition System: SmartCraft PCM 07 digital inductive with electronic
control module.
Charging System: Fully regulated belt driven 70-amp alternator producing
882 W output.
Engine Management: SmartCraft PCM 07 engine control module.
Control System: SmartCraft Digital Throttle and Shift (DTS) providing
smooth, no-backlash control.
Engine Protection: SmartCraft Engine Guardian system with comprehensive
operator warnings and automatic power reduction.
Steering: Remote mechanical compatible; electro-hydraulic power steering
available as optional equipment; Big Tiller Hydraulic option available.
Gear Ratio: 2.08:1 standard.
Shaft Length Options: 20 inches (508 mm) Long (L), 25 inches (635 mm)
Extra Long (XL), Counter Rotation available in 25-inch (CXL).
Trim System: SmartCraft programmable power trim and tilt.
Cooling System: Water cooled with thermostat and pressure control.
Exhaust System: Through propeller hub discharge.
Gear Shift: Forward-Neutral-Reverse (F-N-R) controlled by SmartCraft
DTS.
Recommended Oil: NMMA Certified FCW SAE 25W-50.
Oil Capacity: 6.0 US quarts (5.7 liters).
Emissions Certification: Compliant with applicable marine emissions
standards.
The foundation of the Mercury 135 Verado is a precision-engineered
inline four-cylinder powerhead featuring a deep-skirt block
configuration for exceptional structural rigidity while maintaining
compact dimensions. The cylinder head incorporates advanced four-valve
per cylinder architecture with Dual Overhead Camshafts (DOHC), enabling
optimum valve placement for superior breathing efficiency.
Each cylinder benefits from two intake and two exhaust valves actuated
directly by the DOHC arrangement, maximizing volumetric efficiency
throughout the 5200-6400 RPM operating range. This 16-valve
configuration enhances both power output and operational smoothness,
contributing to the refined character expected from the Verado family.
The combustion chambers are meticulously shaped to complement the
supercharged induction system and sequential multi-port Electronic Fuel
Injection, promoting complete fuel combustion and optimized thermal
efficiency under all operating conditions. The forged and balanced
rotating assembly is engineered to withstand the additional stresses of
supercharged operation while maintaining the smoothness required for
premium applications.
The supercharged induction system with charge air cooling distinguishes
the Verado 135 from conventional outboards in its power class. The
supercharger provides forced induction across the entire operating
range, generating exceptional torque throughout the rev range rather
than only at high RPM. This supercharged power delivery provides
remarkable acceleration and the ability to keep heavily loaded boats on
plane at slower speeds while climbing larger waves with ease.
The charge air cooling system reduces intake air temperature after
compression, increasing air density for improved combustion efficiency
and power output. Electronic boost pressure control precisely manages
supercharger output to match operating conditions and protect the
engine.
The supercharger housing features marine-grade anodized aluminium
construction with Teflon-coated rotors for corrosion resistance and
durability. This sophisticated induction system delivers the
automotive-like responsiveness and unbeatable torque that defines the
Verado driving experience.
The Mercury Verado 135 employs a sophisticated Computer Controlled
Sequential Multi-Port Electronic Fuel Injection (EFI) system that
precisely meters fuel delivery to each cylinder based on continuous
input from multiple engine sensors. This advanced system monitors
parameters including intake air temperature, manifold absolute pressure,
engine coolant temperature, and throttle position to calculate optimal
fuel requirements for any operating condition encountered.
The sequential multi-port design delivers fuel individually to each
cylinder in perfect synchronization with its intake stroke, providing
superior cylinder-to-cylinder distribution and instantaneous throttle
response compared to batch-fire systems. This precision fueling is
essential for achieving the 135 Hp output while maintaining smooth
operation across the broad 5200-6400 RPM power band.
The system ensures reliable starting, seamless acceleration, and
consistent performance whether idling in harbors or running at wide-open
throttle in demanding conditions. The fuel calibration is specifically
developed for supercharged applications, optimizing power delivery while
maintaining the durability required for extended operation. The system
operates on regular unleaded fuel with minimum 90 RON octane rating,
providing flexibility and reduced operating costs.
The Mercury 135 Verado utilizes an integrated dry sump lubrication
system engineered to ensure reliable oil delivery to all critical
components under all operating conditions. This advanced system
maintains a positive pressure oil supply to the crankshaft main
bearings, connecting rod bearings, camshaft journals, and 16-valve
valvetrain regardless of engine attitude or operating conditions.
The dry sump design provides several advantages including reduced risk
of oil starvation during extreme maneuvers, improved oil cooling, and
more consistent lubrication during high-performance operation. The
system circulates NMMA Certified FCW SAE 25W-50 oil, specifically
formulated for the demanding marine environment with enhanced corrosion
protection properties and the film strength required for supercharged
applications.
The oil capacity and change intervals follow the factory maintenance
schedule for optimal engine protection. The industry-exclusive top-cowl
service door provides convenient access for routine oil level checks
without removing the engine cowl.
The water-cooled cooling system utilizes a positive displacement water
pump drawing water through gearcase-mounted pickups and circulating it
through precision-engineered cooling passages within the cylinder block
and cylinder head. A thermostat regulates coolant flow to maintain
optimal operating temperatures for combustion efficiency and component
longevity, allowing the engine to reach efficient operating temperatures
quickly before opening to permit full circulation.
The system includes pressure control to maintain adequate cooling flow
across all engine speeds and operating conditions encountered. This
thermostatically controlled system ensures consistent operating
temperatures for optimal combustion efficiency, fuel economy, and
component longevity.
Overheat sensors interface with the SmartCraft Engine Guardian system to
provide operator warnings and automatic power reduction if cooling
system anomalies occur. The cooling capacity is engineered to provide
consistent performance in varying water temperatures, supporting the
engine's capability for sustained operation in diverse environments.
| Mid Section and Lower Unit |
The midsection of the Mercury Verado 135 features the innovative
Advanced MidSection (AMS) design that cradles the powerhead to virtually
eliminate vibration during operation. This specially designed cradle
mounting system surrounds the powerhead with precision-engineered mounts
that isolate vibration while in motion. As thrust load increases during
acceleration and high-speed operation, the AMS mounting system stiffens
progressively to improve handling characteristics.
This design provides more lift and better top speed performance while
eliminating the crabbing effect felt in large displacement four-stroke
outboards. The AMS represents a significant advancement in outboard
mounting technology, contributing to the refined driving experience.
The lower unit features a heavy-duty gearcase engineered for minimal
hydrodynamic drag while maintaining exceptional durability. The
forward-neutral-reverse (F-N-R) gear engagement is accomplished through
the SmartCraft Digital Throttle and Shift (DTS) system, providing
instantaneous response and smooth shifting by eliminating the hesitation
of traditional mechanical cable systems.
The 2.08:1 gear ratio provides an optimum balance between acceleration
and top-end speed for a wide range of applications. The water pump is
strategically positioned for easy inspection and service access. Counter
rotation gearcases are available in the 25-inch shaft length for
twin-engine applications requiring opposite propeller rotation.
The Power Trim and Tilt system on the Mercury Verado 135 is a SmartCraft
programmable electro-hydraulic actuated mechanism providing complete
control over engine angle relative to the transom. The trim function,
utilized while underway, allows the operator to optimize boat attitude
for varying conditions, improving fuel efficiency, ride quality, and
performance.
The SmartCraft programmability enables integration with vessel control
systems for enhanced operational convenience. The tilt function raises
the engine completely clear of the water for trailering, launching,
beaching, and maintenance access. The hydraulic system is self-contained
and engineered for smooth, responsive operation under all conditions.
The trim range is calibrated to support the unique handling
characteristics of the AMS mounting system and supercharged power
delivery.
The Mercury Verado 135 is designed to accommodate a comprehensive range
of propeller options, allowing precise performance tailoring for
specific boat and application requirements. For best all around
performance from any outboard and boat combination, a propeller should
be selected that allows the engine to operate in the upper half of the
recommended full throttle RPM range with the boat normally loaded.
This RPM range provides better acceleration while maintaining maximum
boat speed. If changing conditions cause the RPM to drop below the
recommended range, such as warmer more humid weather, operation at
higher elevations, increased boat load, or a dirty boat bottom or
gearcase, a propeller change or cleaning may be required to maintain
performance and ensure the outboard durability.
Checking full throttle RPM using an accurate tachometer with the engine
trimmed out to a balanced-steering condition without causing the
propeller to break loose is essential for proper propeller matching. The
Verado 135 is typically supplied without a propeller, recognizing that
propeller selection is best determined by a qualified dealer based on
the buyer's specific vessel and performance expectations.
Comparative Weight: 231 kg (509 lbs) without oil, propeller, or integral
steering cylinder.
Dry Weight: 206 kg (455 lbs) lightest configuration.
Shaft Length Options: 20" (508 mm) Long, 25" (635 mm) Extra Long.
Recommended Transom Height: 508 mm for Long shaft model.
The Mercury Verado 135 is designed for straightforward maintenance,
incorporating features that simplify routine service procedures. An
industry-exclusive top cowl service door provides convenient access for
routine oil level checks without removing the entire engine cowl. The
SmartCraft Engine Guardian system monitors critical engine parameters
and provides operator alerts, helping prevent damage before it occurs.
Key maintenance requirements include regular engine oil and filter
changes using NMMA Certified FCW SAE 25W-50 oil. Gearcase lubricant
requires regular inspection and replacement at specified intervals. The
water pump impeller should receive annual inspection with replacement as
needed. Sacrificial anodes require regular inspection and replacement
when significantly eroded to maintain galvanic corrosion protection.
Freshwater flushing after operation in salt, brackish, or polluted water
is essential, facilitated through designated attachment points. Proper
maintenance is essential for obtaining superior performance and economy
from the Verado 135. The owner registration card is key to trouble-free
enjoyment of the product.
Transom Mounting Bolts: 55 lb-ft.
Propeller Nut: 60-80 lb-ft.
Spark Plugs: 15-22 lb-ft.
Water Pump Housing Bolts: 15-20 lb-ft.
Gearcase Cover Screws: 80-110 lb-in.
Engine Mount Bolts: 50-70 lb-ft.
The Mercury Verado 135 is designed for a wide range of boating
applications where refined supercharged power is desired. Family
runabouts and deck boats benefit from the remarkably smooth and quiet
operation of the AMS mounting system, enhancing passenger comfort during
recreational outings. Multi-species fishing boats utilize the engine's
supercharged torque for quick planing and efficient cruising when
covering extensive water.
Pontoon boats and tritoons realize the benefits of the exceptional
low-end torque for pulling watersports participants and maintaining
speed with passenger loads. Aluminum fishing boats and fish-and-ski
combinations appreciate the compact inline four-cylinder configuration
and superior corrosion protection for freshwater and coastal
applications. Bay boats and flats boats benefit from the instant
throttle response and Digital Throttle and Shift precision for
maneuvering in tight quarters.
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