Marine Engineering in Mallorca
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Our Most Popular Service
At Heavy Seas, we provide a comprehensive marine engineering service in Mallorca, specialising in the diagnosis, maintenance, repair, and repowering of all types of marine engines.
We work with leisure boats, yachts, superyachts, tenders, and large vessels, delivering precise, fast, and tailored technical solutions for each project.
As official service providers for Mercury, Volvo Penta, and Yanmar in the Balearic Islands, we guarantee quality, access to genuine spare parts, and certified technicians for reliable engine performance.
Engine Maintenance, Repairs & Repowering
Our technical team provides planned and corrective support across the full engine lifecycle, adapting each intervention to the vessel, engine condition and operational requirements.
Maintenance
Regular servicing helps preserve performance, reduce the risk of unexpected breakdowns and extend the lifespan of onboard systems.
Routine maintenance can include
- Oil, filter and consumable replacement
- Fuel and cooling system checks
- Impeller, injector, belt and anode inspections
- Electrical and electronic diagnostics
- Adjustments, calibration and performance testing
Scheduled servicing can be carried out directly onboard or coordinated as part of wider maintenance and refit works.
Repairs & Diagnostics
Accurate diagnosis is essential when an engine develops a fault, helping avoid unnecessary work and reduce vessel downtime.
Our technicians carry out mechanical, electrical and electronic troubleshooting across a wide range of engine types and power configurations.
Typical repair work includes:
- Leak and overheating issues
- Starting and electrical faults
- Fuel injection and pump repairs
- Cooling system repairs
- Gasket and seal replacement
- Transmission and sterndrive repairs
- Partial and complete engine rebuilds
Advanced diagnostic equipment allows us to identify faults accurately and define the most appropriate repair strategy.
Installation & Repowering
Our work can include:
- New engine installation
- Complete repowering projects
- Electronic configuration
- Performance adjustments
- System integration
- Sea trials and commissioning
Each project is planned according to the vessel, propulsion requirements and intended use, with particular attention to reliability, efficiency and integration with existing onboard systems.
Inboard & Outboard Engine Expertise
Our team works across both inboard and outboard systems, adapting each intervention to the engine, vessel and manufacturer requirements.
All inspections and maintenance are carried out following the service procedures, technical specifications and protocols established by each manufacturer.
Outboard Engines
We provide servicing, diagnostics and repair support for outboard engines fitted to sports boats, RIBs, tenders, fishing vessels and auxiliary craft.
Our team works on engines and associated systems including steering, trim, propellers and electronics, with experience ranging from scheduled maintenance to complex troubleshooting.
As an official Mercury service provider, we also offer manufacturer-backed technical support for the latest generation of Mercury outboard engines.
Inboard Engines
We carry out advanced maintenance and repair work on inboard engines for yachts, superyachts and larger vessels.
Services include alignments, transmission repairs, exhaust systems, turbochargers, heat exchangers and complete engine refurbishments.
Our experience in refit and complex technical projects allows us to coordinate extensive engine work while minimising downtime and maintaining vessel reliability and performance.
Official distributors
Official Sales & Service Partners for:
Volvo Penta, Mercury, Yanmar & Humphree
Advantages of an Official Service
- Certified and specialised technicians
- Access to original spare parts
- Official electronic diagnostics
- Software and system updates
- Manufacturer warranty
- Repairs according to official technical specifications
- Increased reliability and engine lifespan
- Professional maintenance history
Other brands we work with
Our technicians also have extensive experience working with a wide range of engine manufacturers.
INBOARD BRANDS
- Caterpillar
- Cummins
- Iveco
- Volkswagen Marine
- Perkins
- FPT Iveco
OUTBOARD BRANDS
- Yamaha
- Evinrude
- Parsun
- Torqeedo
- Suzuki
- Honda
- Mariner
Frequently Asked Questions
About Engineering
A marine engine should be inspected if you notice starting problems, overheating, unusual noise, smoke, vibration, loss of power or irregular fuel consumption. Regular inspections are also recommended before the high season or before long trips.
Yes. Our technicians can carry out onboard inspections and electronic diagnostics to identify mechanical, electrical or performance-related issues. After the assessment, we recommend the most suitable repair or maintenance solution.
In many cases, engine problems can be solved with targeted repairs or maintenance. Repowering may be recommended when the engine is unreliable, inefficient, outdated, difficult to repair or no longer suitable for the vessel’s use.
It is helpful to provide the engine brand, model, vessel type, location, and a description of the issue or service required. Photos, videos, error codes or maintenance history can also help our team assess the situation more efficiently.
Yes. Engine maintenance, repairs, repowering, diagnostics, system integration and sea trials can be planned as part of a wider refit or maintenance project. This allows the technical work to be coordinated efficiently and reduces vessel downtime.