Wartsila 31, Product Manual

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The fuel shall be free from used lubricating oil (ULO). A fuel shall be considered to contain ULO when either one of the following
conditions is met:
●
Calcium > 30 mg/kg and zinc > 15 mg/kg
●
Calcium > 30 mg/kg and phosphorus > 15 mg/kg
8)
NOTE
b) if not within the given limits, the maximum sulphur content to be defined in
accordance with relevant statutory limitations.
c) It shall be ensured that the pour point is suitable for the equipment on board,
especially if the ship operates in cold climates.
d) If the sample is not clear and bright, the total sediment by hot filtration and water
tests shall be required.
e) If the sample is not clear and bright, the test cannot be undertaken and hence
the oxidation stability limit shall not apply.
f) If the sample is not clear and bright, the test cannot be undertaken and hence
the lubricity limit shall not apply.
g) The requirement is applicable to fuels with a sulphur content below 500 mg/kg
(0.050 % mass).
h) Additional properties specified by Wärtsilä, which are not included in the ISO
specification.
i) If the sample is dyed and not transparent, then the water limit and test method
ISO 12937 shall apply.
6-4 Wärtsilä 31 Product Guide - a1 - 18 October 2016
Wärtsilä 31 Product Guide 6. Fuel Oil System