Sealine C330

Common issues

• Raw water cooling system fouling/blockage (strainers, heat exchangers) from marine growth or debris
• Stern gland/shaft seal wear leading to increased bilge water ingress
• Fuel system contamination (diesel bug/algae growth) in tanks with infrequent turnover
• Battery and electrical system corrosion from the marine environment, especially during low-use lay-up periods
• Sterndrive/leg or shaft coupling wear and galvanic/electrolytic corrosion if anodes are neglected
• Bilge pump and float switch failures going unnoticed during layup
• Osmosis/gelcoat blistering on the hull below the waterline over time

Inspection checklist

• Check raw water strainers, seacocks, and through-hull fittings for condition and free operation
• Inspect the stern gland/shaft seal and stuffing box for excessive leakage
• Check engine oil, coolant, and fuel filter condition and change history
• Test bilge pumps, float switches, and high-water alarms
• Inspect sacrificial anodes on the hull, shaft, and drive legs for consumption/replacement
• Check battery condition, charging system, and corrosion at terminals
• Inspect the hull below the waterline for blistering, damage, or antifouling condition at haul-out
• Verify the fuel tank and lines for signs of contamination or degradation
• Check steering, throttle/gear cable, and control linkage for free, correct operation
• Confirm engine room fire suppression, if fitted, and safety equipment are in date

Service intervals

Typical wear limits

Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.

Critical spares

• Raw water pump impeller
• Fuel filters/water separator elements
• Engine oil and filter
• Sacrificial anodes (hull, shaft, drive leg as fitted)
• Bilge pump and float switch
• Stern gland packing/seal kit
• Drive belts

Safety

• Confirm engine room ventilation and bilge blower operation before starting inboard engines to avoid fume accumulation
• Fuel system leaks are a fire/explosion hazard - check fittings and hoses regularly, especially after any engine work
• Carbon monoxide risk from exhaust leaks or poor ventilation near accommodation spaces
• Verify seacocks are accessible and operable in an emergency flooding response

Class survey

Note on scope: this entry (category 'Yacht & Boat Equipment (Quarantine)') covers a recreational motor cruiser as a whole vessel rather than a single piece of shipboard machinery, and the source data provides only a DNV RCD (Recreational Craft Directive) certificate reference with no engine/drive specification - the content above reflects generic good practice for diesel inboard-powered cruisers of this size class, not model-specific figures for the exact engine fitted. This class of vessel is typically surveyed under recreational craft/RCD requirements rather than SOLAS/commercial class machinery survey.