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Mercury
Mercury 350 HP ECT 6.2L
$8,250.00
Mercury MerCruiser 6.2 L 350 HP ECT marine engine — V-8, MPI fuel injected sterndrive power for cruisers and performance boats
Horsepower
350 HP
Fuel Type
gasoline
Displacement
6.2 L/ 377 CID
Stroke
3.75" (95.25 mm)
Rated Output
261 KW/ 350mph
In Stock (3 available)
Free shipping on orders over $500
90-day warranty included
Description
The Mercury MerCruiser 6.2 L 350 ECT is a powerful marine V-8 gasoline engine delivering 350 horsepower with smooth acceleration and strong torque for sterndrive boats. Designed for reliability and performance on the water, it features electronic fuel injection (MPI), SmartCraft engine controls, and fresh water or closed-loop cooling options for longevity and ease of maintenance.
Specifications
SKUM8204
BrandMercury
CategoryInboard Engines
ConditionNew
Horsepower350 HP
Fuel Typegasoline
Displacement6.2 L/ 377 CID
No. of Cylinders8 cylinders
Stroke3.75" (95.25 mm)
Weight823.00 lbs
Rated Output261 KW/ 350mph
Dry Weight391 kg/ 862 lbs
Dimensions813mm x 762mm x 559mm
Frequently Asked Questions
What is the Mercury 350 HP ECT 6.2L engine?
The Mercury 350 HP ECT 6.2L is a V-8 marine inboard sterndrive engine built by Mercury Marine with about 350 horsepower (261 kW) from a 6.2-liter displacement engine. It’s engineered for strong acceleration, smooth performance, and modern marine use.
What does “ECT” mean?
ECT stands for Emission Control Technology, indicating that the engine meets specific emissions and fuel-control standards required for marine applications. (Depending on region, compliance details may vary.)
What are the key specifications of this engine?
Power & Performance: Horsepower: ~350 HP (261 kW) Displacement: 6.2 liters (377 cid) Engine Type: V-8 with 2 valves per cylinder Maximum RPM: ~5,000–5,400 rpm Fuel & Ignition: Fuel Delivery: Computer-controlled Multi-Port Electronic Fuel Injection (MPI) Fuel Requirement: Unleaded regular 87 octane minimum or 90 RON max with up to 10 % ethanol tolerance Ignition: SmartCraft PCM 112 digital Inductive. Dimensions & Weight: Weight (dry): ~862 lbs (391 kg) Size: ~32″ L × 30″ W × 22″ H (813 × 762 × 559 mm)
What fuel should I use?
Use unleaded regular gasoline (87 octane, R+M/2) minimum, with up to 10 % ethanol tolerated. Some regions recommend fuel up to 90 RON. Always follow Mercury’s guidelines for your specific market.
Does this engine use electronic throttle and shift controls?
This engine can be configured with mechanical shifting, or optionally with SmartCraft DTS (Digital Throttle & Shift) and electronic throttle control, depending on the installation package.
What cooling system does it use?
The engine is freshwater cooled with options for SeaCore corrosion protection, or standard water-cooled with a thermostat, depending on installation.
What oil and maintenance does this engine require?
NMMA-certified FC-W 25W-40 synthetic blend (or equivalent per Mercury guidelines). Routine service tasks include: Regular oil and filter changes Fuel filter and injector inspection Cooling-system checks Checking belts, hoses, and belts
How efficient is the fuel consumption?
Actual fuel economy varies by boat size, load, propeller choice, and operation. Like most marine sterndrives, efficient cruise is typically at mid-range rpm with fuel use rising at wide-open throttle — exact figures depend on your vessel.
Can this engine be used in saltwater?
Yes if properly maintained. Marine cooling and corrosion management (such as anodes and SeaCore options) should be part of your installation and routine maintenance to help protect from saltwater corrosion.
What drives or gearboxes are compatible?
The Mercury 350 ECT 6.2L pairs with common sterndrives (e.g., Bravo One, Bravo Two, Bravo Three) depending on hull design and application requirements.
Is this engine reliable?
Mercury sterndrives are widely used and engineered for recreational boating. Reliability depends heavily on regular maintenance, proper installation, fuel quality, and correct operating use.
