Yacht/Boat DNV-Approved (Review) · Yacht & Boat Equipment
The Volvo Penta D4/D6 SOLAS series are four- and six‑cylinder marine diesel engines designed for yachts and passenger craft, featuring integrated electronic control and full compliance with SOLAS safety standards.
What our service work and the manufacturer documentation say about keeping this model running.
Servicing per the manufacturer's manual and classification society requirements. Annual inspection at class survey. Stock spare parts as specified by the manufacturer.
| Engine Oil & Filter Change | 200-250 hours or annually, whichever comes first |
|---|---|
| Fuel Filter (Primary & Secondary) Replacement | 200-250 hours or annually, whichever comes first |
| Seawater Pump Impeller Replacement | 200-250 hours or annually, or every 2 years regardless of hours |
| Air Filter Element Replacement | 200-250 hours or annually, more frequently in dusty environments |
| Valve Clearance Adjustment | 800-1000 hours |
| Coolant Replacement | Every 2 years or 1000 hours |
| Heat Exchanger Cleaning | Every 2-3 years or 1000-1500 hours, depending on water quality |
| Turbocharger Inspection | 500 hours (visual check for play), 1000 hours (detailed inspection) |
Typical intervals for this design class, not the manufacturer’s figures for your model. The manufacturer’s manual is binding.
| Crankshaft Deflection | Within manufacturer's specified limits, typically <0.05mm for small engines, checked at main bearings. |
|---|---|
| Piston Ring End Gap | Max. 1.0-1.5mm (check service manual for exact values, typically 0.3-0.5mm new). |
| Main/Con-rod Bearing Clearance | Max. 0.10-0.15mm (check service manual for exact values, typically 0.05-0.08mm new). |
| Turbocharger Shaft Play (Axial) | Max. 0.10-0.15mm (check service manual for exact values, radial play also critical). |
| Fuel Injector Spray Pattern | Visual inspection for consistent, finely atomized cone; no dribbling or streaking. |
| Seawater Pump Impeller Vane Length | No significant tears, cracks, or missing vanes; flexibility maintained. |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Class surveyors will typically focus on the operational readiness and safety aspects of the auxiliary engine. This includes witnessing a satisfactory start and load test, verifying the functionality of all safety devices (overspeed, low oil pressure, high temperature shutdowns), checking the integrity of fuel lines (especially high-pressure lines) and shut-off valves, inspecting the exhaust system for leaks and proper insulation, and confirming the security of engine mountings. They will also review maintenance records, logbook entries, and ensure critical spares are onboard as per SOLAS requirements. Special attention is paid to emergency stop functionality and the overall cleanliness and fire safety of the engine space.
Estimated lifetime: 12,000 - 20,000 hours before major overhaul, with diligent maintenance and proper operation.
Spare parts via AB Volvo Penta or authorised distribution partners. Lead time: 2-6 weeks.
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