SHIRE 50 Workboat Engine – Product Overview

The SHIRE 50 Workboat Engine 50HP is built for operators who need dependable marine diesel propulsion with smooth running, quiet operation, and proven workboat reliability. Designed for professional and demanding marine use, this engine is based on the respected Yanmar 4TNV platform and configured as a 4-cylinder propulsion engine rated at 50hp at 3000 rpm.

Shire engines are built to high quality standards and tested before delivery. Each engine is run and inspected through dyno testing before dispatch, helping ensure the unit is prepared for reliable service in real-world marine applications.

This engine is supplied with a PRM150 hydraulic gearbox, 50 amp 12V alternator, control panel with warning lights, remote coolant header tank, diesel fuel filter and water separator, electric fuel lift pump, flexible fuel lines, engine oil, coolant / anti-freeze, and stainless steel water injection exhaust elbow.

For customers comparing Shire workboat engines, 50hp marine diesel engines, Yanmar-based marine engines, PRM hydraulic gearbox packages, and commercial propulsion engines, the SHIRE 50 Workboat Engine is a strong and practical choice.

Built for Workboats and Professional Marine Users

The SHIRE 50 Workboat Engine is designed for customers who need dependable propulsion in demanding operating environments.

Workboats, commercial craft, narrowboats, inland vessels, service boats, utility boats, patrol boats, and professional marine vessels often need engines that can run smoothly, start reliably, and perform consistently under regular use.

Barrus has experience custom building engines for professional users, including marine and government service applications. That same focus on quality and reliability is reflected in the Shire engine range.

For buyers searching for a 50hp workboat engine, this model offers a strong combination of robust base engine design, hydraulic gearbox compatibility, dyno-tested quality, and practical included accessories.

50HP Yanmar-Based Diesel Performance

The SHIRE 50 Workboat Engine 50HP uses a Yanmar 4TNV base engine, giving it a reliable foundation for marine propulsion.

The engine is rated at 50hp at 3000 rpm, making it suitable for vessels that need steady diesel power for cruising, utility operation, inland navigation, commercial service, and workboat use.

Its 2190cc displacement supports practical torque delivery and smooth operation across typical marine running conditions.

A Yanmar-based marine engine is a strong choice for buyers who value proven diesel engineering, serviceability, and dependable performance. When paired with Shire marine conversion quality and final dyno testing, the engine becomes a practical propulsion package for serious boat owners and commercial operators.

For customers searching for a Yanmar 4TNV marine engine 50hp, the SHIRE 50 provides a ready marine propulsion configuration.

Smooth and Quiet Operation

The SHIRE 50 Workboat Engine is designed for smooth and quiet operation, making it suitable for vessels where comfort and low onboard noise matter.

In workboat and inland vessel applications, operators may run engines for long periods. Smooth running helps improve crew comfort, reduce fatigue, and create a more pleasant boating experience.

Quiet operation is also important for narrowboats, river craft, passenger vessels, marina operation, canal use, and workboat environments where excessive engine noise can be disruptive.

The combination of a balanced 4-cylinder diesel platform, marine-specific setup, and quality inspection helps support refined operation.

For buyers comparing quiet marine diesel engines, the SHIRE 50 is built to deliver dependable and comfortable propulsion.

PRM150 Hydraulic Gearbox Included

The SHIRE 50 Workboat Engine 50HP is supplied with a PRM150 hydraulic gearbox.

A hydraulic gearbox is an important part of the propulsion package because it transfers engine power to the propeller shaft while allowing controlled forward and reverse operation.

The PRM150 gearbox is a practical match for this horsepower class and is well suited to many inland, commercial, and workboat applications.

For repower buyers, an included gearbox can simplify planning because the engine and transmission package are already specified together.

Customers should still confirm reduction ratio, shaft alignment, coupling type, engine bed layout, propeller matching, and vessel compatibility before installation.

For buyers searching for a 50hp marine diesel engine with PRM150 gearbox, this Shire package provides a focused and useful configuration.

Fully Dyno Tested Before Dispatch

Every SHIRE 50 Workboat Engine is fully dyno tested before dispatch.

Dyno testing helps verify engine performance, running condition, output, and basic operational readiness before the engine reaches the customer. The engine is run in, inspected, and checked as part of the delivery process.

For commercial operators and boat owners, this adds confidence because the engine has already been tested before installation.

A full delivery inspection also helps reduce the risk of avoidable issues during setup and commissioning.

For customers buying a new workboat diesel engine, dyno testing is a valuable quality assurance step.

ISO9001-2015 Quality Standards

Shire engines are built to quality standards laid down by ISO9001-2015, supporting consistency in manufacturing, inspection, and delivery processes.

For marine buyers, quality control matters because an engine must operate reliably in demanding conditions. Consistent build standards help improve confidence in long-term durability and performance.

This is especially important for workboat, commercial, and professional users where downtime can affect operations.

The SHIRE 50 Workboat Engine benefits from a structured build and inspection process, helping support reliable service across a wide range of marine applications.

For customers comparing professional marine diesel engines, ISO-backed quality standards add trust and credibility.

250-Hour Oil and Filter Change Period

The SHIRE 50 Workboat Engine 50HP is specified with a 250-hour oil and filter change period.

A clear service interval helps owners and operators plan maintenance more effectively. For commercial, inland, and workboat users, service planning is essential because engines may operate regularly and need consistent care.

A 250-hour interval can help reduce maintenance disruption while still supporting proper engine protection.

Buyers should follow the manufacturer’s service schedule, use approved fluids and filters, and maintain accurate service records to protect warranty coverage and long-term reliability.

For customers comparing low-maintenance marine diesel engines, the 250-hour oil and filter service interval is a practical ownership benefit.

50 Amp 12V Alternator for Onboard Electrical Support

The SHIRE 50 Workboat Engine includes a 50 amp 12V alternator, supporting onboard charging and electrical system needs.

A marine engine alternator helps maintain battery charge and support electrical loads while the engine is running. This is important for vessels using lighting, instruments, pumps, control systems, navigation equipment, radios, and other onboard electrical devices.

For workboats and inland craft, dependable charging support helps improve operational reliability.

Buyers should confirm battery bank size, charging requirements, wiring setup, and onboard load needs before installation.

For customers searching for a marine diesel engine with 12V alternator, the SHIRE 50 includes a practical charging specification.

Control Panel With Warning Lights

The SHIRE 50 Workboat Engine 50HP is supplied with a control panel with warning lights.

Clear engine monitoring is important for safe and reliable operation. Warning lights help alert the operator to important engine conditions that may require attention.

For workboat and commercial users, having a dedicated control panel helps support daily operation, startup checks, and issue awareness while underway.

This included panel adds value to the package and helps simplify installation planning.

For buyers replacing an older engine, updated engine monitoring can improve confidence and make operation more straightforward.

Included Cooling and Fuel System Accessories

The SHIRE 50 Workboat Engine includes several useful accessories that support installation and operation.

Included items are a remote coolant header tank, flexible fuel lines, diesel fuel filter / water separator, electric fuel lift pump, engine oil, engine coolant / anti-freeze, and a stainless steel water injection exhaust elbow.

These components help support fuel delivery, cooling system setup, exhaust integration, and initial engine preparation.

The diesel fuel filter and water separator are especially important in marine use because clean fuel helps protect the engine and reduce operating issues.

The stainless steel water injection exhaust elbow adds durability in a critical marine exhaust component.

For buyers searching for a complete Shire workboat engine package, these included accessories add practical value.

Warranty Support for Engine and Components

The SHIRE 50 Workboat Engine 50HP is listed with 3-year warranty support on the engine and components and 1-year warranty on electrical components.

Warranty support adds buyer confidence and helps protect against qualifying issues within the warranty period.

For marine engines, warranty terms are important because installation quality, maintenance records, service intervals, and approved usage can affect eligibility.

Buyers should confirm final warranty registration, coverage terms, commercial-use conditions, service requirements, and installer obligations before purchase.

For customers comparing new 50hp marine diesel engines, warranty support is a meaningful ownership advantage.

Why the SHIRE 50 Workboat Engine Is a Smart Choice

The SHIRE 50 Workboat Engine 50HP stands out because it combines a Yanmar 4TNV base engine, 50hp output, 2190cc displacement, PRM150 hydraulic gearbox, fully dyno-tested quality, ISO9001-2015 manufacturing standards, 250-hour oil and filter service interval, 50 amp 12V alternator, warning-light control panel, and practical included installation accessories.

Many buyers in this category need more than a basic engine. They need a reliable propulsion package that can support long operating hours, commercial requirements, inland vessel use, and professional marine applications.

The SHIRE 50 delivers that combination with smooth operation, quiet performance, dependable diesel power, and strong package completeness.

For customers searching for a SHIRE 50 Workboat Engine 50HP for sale, this model is a strong choice for serious marine propulsion and workboat repower projects.

Who Should Choose This Marine Diesel Engine

The SHIRE 50 Workboat Engine 50HP is best for boat owners, commercial operators, marine engineers, inland vessel users, boatyards, and repower buyers who need a dependable 50hp marine diesel propulsion engine.

It is suitable for workboats, narrowboats, canal boats, river craft, service vessels, small commercial boats, patrol-style vessels, utility craft, and professional marine applications.

This engine is especially useful for buyers who want a Yanmar-based diesel package with PRM hydraulic gearbox, dyno-tested quality, included fuel and cooling accessories, and strong warranty support.

Buyers who need a different gearbox ratio, higher output, saildrive setup, different alternator capacity, or vessel-specific installation components should confirm the final package configuration before purchase.

Technical Specifications

Specification	Details
Product Name	SHIRE 50 Workboat Engine. 50HP
Brand / Range	Shire / Barrus
Product Type	Marine propulsion engine
Engine Configuration	4-cylinder propulsion engine
Base Engine	Yanmar 4TNV
Power Output	50hp
Rated Speed	3000 rpm
Displacement	2190cc
Gearbox	PRM150 hydraulic gearbox
Alternator	50 amp 12V alternator
Oil and Filter Change Period	250 hours
Testing	Fully dyno tested
Control Panel	Control panel with warning lights
Quality Standard	ISO9001-2015
Engine Warranty	3-year warranty on engine and components
Electrical Warranty	1-year warranty on electrical components
Included Cooling Accessory	Remote coolant header tank
Included Fuel Accessories	Flexible fuel lines, diesel fuel filter / water separator, electric fuel lift pump
Included Fluids	Engine oil, engine coolant / anti-freeze
Included Exhaust Component	Stainless steel water injection exhaust elbow
Best Use	Workboats, narrowboats, inland craft, commercial vessels, utility boats, repower projects
Main Benefits	50hp Yanmar-based diesel power, PRM150 gearbox, quiet operation, dyno testing, included accessories, warranty support

Key Product Details and Specifications

The SHIRE 50 Workboat Engine 50HP is a 4-cylinder marine propulsion engine built for dependable workboat and commercial use.

It is based on a Yanmar 4TNV engine platform and rated at 50hp at 3000 rpm.

The engine has a 2190cc displacement, supporting practical marine diesel performance.

It is supplied with a PRM150 hydraulic gearbox.

The package includes a 50 amp 12V alternator for onboard charging support.

Each engine is fully dyno tested, run in, and inspected before dispatch.

The engine includes a control panel with warning lights.

The listed oil and filter service interval is 250 hours.

Included accessories are a remote coolant header tank, two flexible fuel lines, diesel fuel filter / water separator, electric fuel lift pump, engine oil, engine coolant / anti-freeze, and stainless steel water injection exhaust elbow.

Warranty support includes 3 years on the engine and components and 1 year on electrical components.

Buy With Confidence

When buying the SHIRE 50 Workboat Engine 50HP, customers should confirm vessel type, engine room dimensions, mount layout, shaft alignment, gearbox ratio, propeller matching, cooling system setup, exhaust routing, fuel system requirements, electrical needs, service access, and warranty registration requirements.

This model is a strong choice for buyers who want a 50hp Shire marine diesel engine with Yanmar base engine reliability, PRM150 hydraulic gearbox, dyno-tested quality, included fuel and cooling accessories, and smooth quiet operation.

Customers can compare this product with related Shire engines, Barrus marine engines, Yanmar-based workboat engines, PRM gearbox packages, 40hp and 60hp marine diesel engines, fuel filters, control panels, exhaust elbows, and repower accessories.

Professional installation is recommended. Correct engine alignment, gearbox setup, shaft coupling, cooling connection, fuel system installation, exhaust routing, electrical integration, and final commissioning help support reliable performance and long-term engine life.

Frequently Asked Questions

What is the SHIRE 50 Workboat Engine used for?

The SHIRE 50 Workboat Engine 50HP is used for workboats, narrowboats, inland craft, commercial vessels, utility boats, service boats, and marine repower applications requiring reliable 50hp diesel propulsion.

What base engine does the SHIRE 50 use?

The SHIRE 50 uses a Yanmar 4TNV base engine, configured as a 4-cylinder marine propulsion engine.

How much power does the SHIRE 50 produce?

This engine is rated at 50hp at 3000 rpm.

What gearbox is included with the SHIRE 50?

The engine is supplied with a PRM150 hydraulic gearbox.

Is the SHIRE 50 dyno tested?

Yes, the engine is fully dyno tested, run in, and inspected before dispatch.

What alternator does this engine include?

The SHIRE 50 Workboat Engine includes a 50 amp 12V alternator.

What service interval is listed for oil and filter changes?

The listed oil and filter change period is 250 hours.

What accessories are included with the SHIRE 50?

Included accessories include a remote coolant header tank, flexible fuel lines, diesel fuel filter / water separator, electric fuel lift pump, engine oil, engine coolant / anti-freeze, and stainless steel water injection exhaust elbow.