Language

verifiedCertified Marine Engineering Network

Marine engine repair, maintenance and yacht refit in Spain and Italy

Certified shipyard overhauls, diesel propulsion diagnostics, winterisation drydock servicing, and official technical support across Spanish and Italian ports.

engineeringVolvo Penta, MAN, MTU & Yanmar

military_techLicensed Naval Mechanics

fmd_goodRapid Dockside Dispatch

Request technical servicearrow_downward Explore service scopesouth

ACTIVE HARBOR TECHNICAL HUBS

Certified Shipyard Network · Palma, Barcelona, Genoa, Naples

Standard SLA: < 24h Telemetry TriageISO 9001:2015 Marine

waterNaval Heritage · Mediterranean Context

Precision Marine Engineering & Propulsion Reliability

The Mediterranean and Tyrrhenian basins present some of the most aggressive marine operational environments on earth. Elevated water temperatures and heightened salinity levels accelerate galvanic electrolysis, scale calcification inside raw water heat exchangers, and biological fouling on running gear. Operating high-output marine diesel engines under sustained cruising RPM without strict preventative calibration guarantees premature failure and exorbitant downtime.

Nautelo coordinates certified naval master technicians and authorized engine specialists who understand these exact regional realities. From systematic descaling of charge-air coolers and turbocharger intercoolers using non-destructive biochemical flushes to micrometer-level drive shaft realignment and Volvo Penta IPS / Cummins Zeus pod recalibrations, every intervention is performed to original equipment manufacturer (OEM) tolerances.

Our engineers ensure that logbooks are stamped in accordance with Spanish Capitán Marítimo and Italian Capitaneria di Porto technical standards, safeguarding your vessel's warranty compliance, marine insurance validity, and long-term resale appraisal.

Cooling Flush400 hRecommended cycle

Fluid Lab TestASTMSpectrographic standard

Shaft Tolerance±0.05 mmLaser precision align

Warranty Log100%OEM Certified entry

terminal

Authorized Diagnostic Protocol

OEM Proprietary Tooling

check_circleDirect electronic ECM diagnostics for Volvo Vodia, MAN-cats, Yanmar YDT, and MTU Dias.
check_circleCommon-rail fuel injection pressure balancing and flow return rate measurement.
check_circleSpectrographic oil lab analysis for wear metals, soot dilution, and glycol contamination.
check_circleTurbocharger boost pressure validation and turbine shaft end-play tolerance checking.

anchor

Mediterranean Dry-Dock Standard

Environmental & Naval Compliance

check_circleEU Biocidal Products Regulation compliant antifouling applications (Jotun, International).
check_circleGalvanic sacrificial zinc & aluminum anode mapping with electrical bond continuity checks.
check_circlePropspeed foul-release silicone coating on bronze props, rudders, and trim tabs.
check_circleBronze and DZR through-hull ball valve ultrasound inspection and lubrication overhaul.

Engineered Competence

What the Marine Maintenance Service Includes

Comprehensive mechanical, propulsion, and auxiliary support executed by certified shipyard marine engineers across Spain and Italy.

settings_suggest

Diesel Engine Overhaul & Servicing

Scheduled 250h, 500h, and 1,000h service intervals. High-pressure common rail fuel injector calibration, valve lash clearance adjustment, water pump impeller replacement, and complete bench teardown overhauls for Volvo Penta, MAN, MTU, Caterpillar, and Yanmar.

OEM Diagnostics · Genuine Filters · Factory Seals

speed

Propulsion, Pod Drives & Running Gear

Specialized Volvo IPS and Cummins Zeus steerable drive maintenance, pod clutch recalibration, lower unit synthetic oil replacement, laser shaft optical alignment, cutless bearing extraction, dynamic propeller balancing, and PSS dripless shaft seal installation.

Vibration Analysis · Pod Seal Kits · Shaft Alignment

bolt

Marine Generators & Electrical Systems

Auxiliary genset maintenance for Onan, Fischer Panda, Kohler, and Northern Lights. 24V / 230V / 400V electrical load balancing, Mastervolt and Victron Energy lithium battery conversion, pure sine wave inverter programming, and galvanically isolated shore power synchronisation.

Genset Overhaul · LiFePO4 Upgrades · Isolation Transformers

water_drop

Watermakers, Hydraulics & Steering

High-pressure reverse osmosis membrane servicing, chemical biocidal descaling, and high-pressure pump oil renewal for Schenker, Idromar, and Sea Recovery desalinators. Overhaul of hydraulic steering rams, hydraulic tender garages, passerelles, and proportional bow/stern thrusters.

Membrane Replacement · Seal Rebuilds · Thruster Gearboxes

ac_unit

Air Conditioning & Marine Refrigeration

Chilled water marine HVAC loop chemical flushing, raw water sea pump impeller renewal, air handler condensation tray treatment, and fan coil cleaning. Diagnostic leak testing and charge balancing for R410a and R134a refrigeration circuits (Dometic, Frigomar, Webasto).

HVAC Descaling · F-Gas Certified · Pump Rebuilds

file_upload_off

Winterisation & Spring Commissioning

Autumn preservation protocols: non-toxic propylene glycol flushing through raw water cooling circuits, fuel stabilization, anti-corrosion fogging, bilge drying, and battery float management. Pre-season spring sea trial validation, fluid analysis, and hull valve recertification.

Glycol Preservation · Battery Float · Sea Trials

Client Profiles

Tailored Engineering for Demanding Maritime Operations

directions_boat

Private Yacht Owners

Vessel owners who refuse compromises. Requiring factory-certified mechanics, genuine OEM spare parts, and official stamped service records to protect their investment and maximize vessel resale appraisal.

Focus: Resale preservation & manufacturer warranty protection.

sailing

Commercial Charter Fleets

High-duty charter fleets in the Balearics and Costa Smeralda requiring rapid turnaround dockside engineering between Friday guest turnarounds and complete preventative winter shipyard overhauls.

Focus: Maximum uptime & expedited dockside parts dispatch.

search_check

Pre-Purchase Buyers

Discerning yacht purchasers requiring rigorous independent mechanical inspections: endoscopic cylinder bore analysis, cooling jacket pressure testing, oil laboratory spectrometry, and seatrial telemetry data.

Focus: Unbiased pre-closing risk discovery and mechanical audit.

explore

Transiting Cruisers

International yachts transiting the Western Mediterranean facing sudden cooling alarms, fuel injector failures, or electrical generator shut-offs requiring priority berth assistance in unfamiliar foreign ports.

Focus: English, Spanish & Italian speaking dockside dispatch.

Standard Operating Protocol

The 4-Step Engineering Methodology

Every repair and scheduled maintenance engagement adheres to strict naval standards from initial digital telemetry to final stamped certification.

Diagnostic Triage & Telemetry

Remote intake of ECM fault codes, symptoms, vessel location, and service history. Technical assessment and master technician dispatch scheduled within 24 to 48 hours.

Initial SLA: < 24h Confirmation

Dockside or Drydock Inspection

Physical inspection onboard your mooring slip. High-resolution boroscope cylinder inspection, fluid spectrograph sampling, infrared exhaust thermal mapping, and pressure tests.

Hardware: Certified Field Kits

Transparent Work Order

A comprehensive technical quotation breaking down verified OEM spare part serials, technician labor hours, and manufacturer maintenance tolerances before work begins.

Pricing: Itemized Fixed Quotation

Sea Trials & Certification

Full-load sea trials validating manifold temperatures, boost pressure curves, and vibration frequencies. Formal signed logbook certification and Nautelo digital service ledger update.

Outcome: Stamped Naval Logbook

Marina Barcelona 92 Specialist Fabrication & Machining

Custom precision lathe machining, titanium exhaust custom piping, and tailored propeller shafts for luxury yachts and commercial vessels up to 70m.

Visit Partner Facilitynorth_east

fact_checkIntake Requirements

Information Required for Service Scheduling

To expedite diagnostic triage and ensure technician dispatch with correct OEM tooling and filters, please have the following vessel specifications ready:

1
Engine Brand, Model & Serial Numberse.g. Twin Volvo Penta D13-900 / IPS 1200 or MAN V12-1900 with serial nameplates.
2
Current Operating HoursSeparate meter readings for Port engine, Starboard engine, and Auxiliary Generator.
3
Port of Berth & Slip Access AuthorizationCurrent marina, pontoon/slip number, and port captain security access arrangements.
4
Logbook Service History & Heat Exchanger DateDate and operating hours of last raw water heat exchanger service, oil change, and impeller swap.
5
Detailed Symptom or Error Code DescriptionActive digital display fault codes, vibration speeds, smoke color, or requested service tier.

infoAccurate serial numbers allow mechanics to arrive with pre-ordered OEM gaskets and filters.

pin_dropRegional Coverage

Shipyard & Mobile Technical Hubs

Authorized mobile service vans and partner shipyard facilities operating continuously along the Spanish and Italian coastlines:

Palma de Mallorca & Port Adriano

Balearic Marine Engineering Desk

Full shipyard haul-out up to 80m, official Volvo Penta Center, MTU marine support.

Barcelona & Marina Port Vell

Catalan Shipyard Services

Superyacht refit basin, Caterpillar authorized diagnostics, metal fabrication facilities.

Valencia & Dénia

Levante Marine Technical Hub

Rapid ferry & catamaran mechanical dispatch, Yanmar and Cummins official technicians.

Costa Brava & Palamós

Northern Spanish Cluster

Dry storage winterisation yards, shaft alignment, through-hull valve servicing.

Genoa & La Spezia

Ligurian Marine Engineering Cluster

MAN and MTU authorized master workshops, heavy diesel overhaul bays, dyno testing.

Naples & Salerno

Tyrrhenian Technical Desk

Rapid dockside van dispatch covering Amalfi, Capri, Ischia, and Gulf of Naples marinas.

support_agent

Urgent Dockside Dispatch Needed?Spanish & Italian technical hotlines open 08:00 - 20:00 CET

Contact Desk

assignment_turned_inDirect Shipyard Intake

Request Marine Maintenance or Repair

Connect with certified master mechanics and authorized marine shipyard engineers in your port. We review telemetry details within 24 hours.

Technical Queries

Frequently Asked Questions

Essential insights into naval maintenance practices across Mediterranean yachting waters.

Prospective yacht buyers and accredited international marine surveyors (such as YDSA or IIMS) demand stamped official manufacturer logbooks. Non-OEM interventions, counterfeit filtration elements, or undocumented overhauls can diminish a vessel's market value by 10% to 25% and trigger extensive conditional surveys or buyer renegotiations before closing.

Due to the higher summer water temperatures and increased salinity of the Mediterranean basin (salinity ~38 PSU compared to 35 PSU in the Atlantic), raw-water tube bundles experience rapid calcium calcification. We recommend biochemical ultrasonic or circulating descaling every 400 to 500 operating hours or at least every 24 months, accompanied by full zinc sacrificial anode replacements.

Yes. Routine servicing (fluid exchanges, fuel filtration, turbocharger inspections, valve lash adjustments, electronic sensor calibration, generator servicing, and air conditioning loop flushes) is routinely performed in your home marina berth. Complete pod drive removals, shaft cutless bearing pressings, and hull through-valve replacements require haul-out at one of our partner shipyards.

Our pre-purchase mechanical survey includes cold ECM diagnostics, endoscopic boroscope cylinder bore inspections, laboratory spectrographic oil analysis (testing for iron, copper, chromium, sodium, and fuel dilution), cooling system pressure integrity testing, and a 45-minute continuous sea trial recording wide-open-throttle (WOT) manifold boost pressures and crankcase blow-by.

Integrated Brokerage Ecosystem