Yanmar 4LV150 – Marine Diesel Engine 150 HP

Description

Seeking a closed-loop fresh water cooled diesel with a verified 150 horsepower rating? The Yanmar 4LV150 operates at a governed 3500 RPM perfectly. This 2.755-liter in-line 4 engine utilizes a massive 12V 130-amp alternator internally. Advanced common-rail injection significantly reduces idle noise compared to older units. Turbocharged intercooled aspiration optimizes air density continuously. Forced enclosed lubrication utilizes an 8.5-liter oil sump. This actively protects moving components across varying dynamic operational loads. It eliminates the need for complex external air management setups inside small enclosed compartments.

By utilizing a verified 9-liter freshwater heat exchanger, this 4-cylinder engine actively prevents internal metal corrosion constantly. Raw seawater stays completely outside the internal engine cylinder waterways. This permanently prevents internal salt scaling inside the block. The native SAE 4 flywheel housing mounts seamlessly to KMH50A hydraulic marine gears. Total dry weight registers at exactly 334 kg. Repower mechanics must factor this static physical mass into the vessel’s rear hull displacement center before finalizing the heavy transmission coupling alignment process effectively during sea trials.

Key Specifications of the Yanmar 4LV150 Inboard Diesel Engine

• This 2.755-liter 4-cylinder diesel pushes a verified 150 horsepower at 3500 RPM for heavy displacement and planning hulls.
• The common-rail direct fuel injection system accurately meters internal pressure, significantly dropping mechanical running noise and visible exhaust smoke.
• Turbocharged intercooled intake technology maximizes combustion oxygen density, maintaining highly responsive throttle performance throughout the entire mid-range operating speed.
• A closed freshwater heat exchanger isolates internal engine cylinders from raw seawater, preventing internal scale buildup and devastating salt corrosion.
• An onboard 12V 130-amp alternator pushes continuous electrical current to support heavy house battery banks and modern bridge electronics.
• The standard SAE 4 flywheel housing permits flexible coupling to KMH50V hydraulic marine gears and compatible ZT370 sterndrive setups.

Engine Operation and Output

Supplying fuel under extreme pressure, this 2.755-liter Yanmar engine ensures exceptional physical power density continuously. An 8.5-liter oil sump ensures forced pressure lubrication during demanding continuous offshore runs. The modern common-rail setup satisfies stringent EPA Tier 3, RCD II, and IMO II emissions limits globally. This happens by continuously manipulating fuel injection timing across the 1-3-4-2 firing order. Throttle synchronization runs directly through the digital VC10 electronic control network. This bypasses legacy mechanical push-pull cable friction issues during tight marina docking maneuvers effortlessly.

Why Choose the Yanmar 4LV150 Inboard Diesel Engine

Yacht refit specialists select the 4LV150 inboard diesel engine for its substantial 2.755-liter displacement and dependable 150 horsepower output. Electronic common-rail injection provides remarkably clean running conditions compared to older mechanically governed units. Featuring a substantial 130-amp alternator, it effectively sustains large DC refrigeration compressors or navigation screens. The SAE 4 flywheel housing adapts immediately to KMH50A hydraulic transmissions or heavy ZT370 sterndrives. Total dry weight remains strictly at 334 kg. This actively minimizes drastic center of gravity shifts inside your vessel’s engine room.

Installation and Alignment Considerations

Review your engine bed stringers closely to determine precise 334 kg mount positioning accurately. Mechanics must align the KMH50A transmission output flange directly to the propeller shaft within strict manufacturer tolerances. Ensure your raw water sea strainers and wet exhaust piping comply with the exact flow parameters required for a 150 horsepower block. The water-cooled exhaust manifold strictly manages radiant engine compartment heat. It requires specific cooling water injection routing to prevent backward seawater flooding into the cylinders during sudden offshore engine shutdowns entirely.

Warranty and Support

Yanmar secures this 2.755-liter propulsion block with a standard Limited Factory Warranty covering major internal assembly defects extensively. Mulmarine.com provides essential product-information support before purchase and technical assistance with order-related questions. A thorough pre-shipment visual inspection confirms the crated engine item and all documented included components. Mechanics and vessel owners should examine warranty coverage scope concerning specific commercial versus recreational duty cycles. Please review the detailed warranty coverage and eligibility details directly on Mulmarine.com before placing your final heavy freight purchase order with us.

Before Ordering the Yanmar 4LV150 Inboard Diesel Engine

Ascertain your engine room hatch opening carefully to confirm adequate fitting clearance for this 334 kg block. You must verify your intended transmission reduction gear ratio and existing shaft coupling dimensions. Check that your onboard DC wiring system safely supports a 12V 130-amp alternator charging circuit output. Next, confirm whether your helm station supports native VC10 electronic control inputs versus legacy mechanical push-pull cables. Ensure your existing diesel fuel filtration system matches the precise EN 590 flow demands for common-rail injection networks actively.