PROJECT CASE STUDY

Engine, Charging and Power-System Reliability Upgrade

An integrated engine, charging and electrical-system project designed to improve mechanical reliability, charging performance and confidence before an extended Caribbean cruise.

YACHT

Beneteau 40

PROJECT TYPE

Engine Upgrade

LOCATION

Grenada

DURATION

2 Weeks

COMPLETED

March 2026

01

The Owner's Goal

The new owners were preparing for an extended cruise and wanted to resolve several recurring mechanical and electrical issues before departure.

The engine had become less reliable to start, charging performance was inconsistent and the yacht’s batteries were not recovering as quickly as expected while motoring. There were also signs that several cooling, fuel and electrical components required attention.

02

The Challenges

Intermittent Faults

The starting and charging problems did not occur consistently, making careful diagnosis essential.

Multiple Connected Systems

The engine, alternator, batteries, chargers and power-management equipment all affected one another.

Departure Schedule

The work needed to be completed, tested and proven before the owners’ planned departure.

03

Our Solution

We approached the project as a complete reliability review rather than treating each symptom separately.

The engine, starting circuit, alternator, battery bank, charging controls, cooling system and fuel supply were inspected and tested. Worn components were replaced, electrical connections were improved and the charging system was upgraded to work correctly with the yacht’s battery configuration.

Following the repairs and upgrades, the yacht underwent dock testing and sea trials to confirm performance under realistic operating conditions.

04

Scope of Work

  • Complete engine inspection
  • Diagnose starting difficulties
  • Service engine and generator
  • Inspect cooling system
  • Replace worn hoses, belts and filters
  • Review fuel supply and filtration
  • Test starter motor and starting circuit
  • Assess alternator output
  • Upgrade charging controls
  • Improve engine-bay wiring and protection
  • Integrate charging with the battery system
  • Test alarms and instrumentation
  • Complete dock testing and sea trial
  • Provide recommendations for future maintenance
05

Equipment Installed

Engine service components
Cooling-system hoses and belts
Fuel filters & associated components
Alternator charging equipment
Battery and power-management controls
Upgraded engine-bay cabling
Electrical isolation and protection
Monitoring equipment
06

The Results

The yacht now has more dependable propulsion, improved charging performance and a safer, better-organised engine-bay installation.

Greater Reliability

The engine starts consistently and essential mechanical systems have been serviced and tested.

Improved Charging

The battery bank receives more dependable charging while the engine is running.

Greater Confidence Underway

The owners departed with a clearer understanding of the systems and confidence that the yacht had been properly prepared.