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Fuel change caused engine failure

Swedish P&I Club issues Monthly Safety Scenario for April 2015 TheSwedish P&I Club published its Monthly Safety Scenario for April 2015 regarding engine failure due to fuel change .The Swedish Club publishes on a monthly basis a new "Monthly Safety Scenario" (MSS) to assist owners in their efforts of complying with the maritime regulations.The vessel was approaching California in moderate weather conditions. The weather forecast predicted an increase to gale forces. The vessel was soon to enter the low sulphur zone and the engineers were running behind in preparing to switch over to low sulphur fuel.They did however manage to switch over just before entering the low sulphur zone. Suddenly the main engine stopped, as apparently the fuel pumps had failed.There can be difficulties when switching from one fuel to another due to low load operations and leaking pumps caused by low fuel viscosity. This is because distillate fuels can gas up at a too high temperatures causing vapour locking and fuel starvation.Low viscosity fuels will flow through fine clearances previously sealed by higher viscosity fuel resulting in fuel leakage. Distillates do not require heating like HFO. If the distillate temperature is too high, the viscosity will be greatly reduced ...

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