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Thornycroft 154

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Thornycroft 154

We have listed marine engine parts and spares for the Thornycroft model 154 below. The inclusion of items on this page does not infer that these items are genuine Thornycroft spares, please check carefully the suitability of the item for your own application. Requests for Thornycroft spares should always be accompanied by the engine number / build list.

The Thornycroft 154 is a 4 cylinder, 4 stroke, vertical, inline 2.52L diesel engine, based on the BMC2.52 series engine block, once the most popular fitment in London black taxis. This replaced the ageing BMC2.2 engine which was never marinised by Thornycroft, but for which we can supply some spare parts.

Over the years the Thornycroft 154 saw many production modifications, replacing the cast iron manifolds with marine grade aluminium and then the modern combined heat exchanger manifold units. The Thornycroft 154 was most popular in its heat exchanger cooled configuration which proved extremely popular in medium size hire fleets and private cruisers, for example Seamaster.

The internals of the Thornycroft 154 engine remained very consistent throughout production, consequently there are not many variations on spare parts. Many items are difficult to obtain, or are now obsolete, as production and tooling was moved to India and the factory ceased production a few years later.

From the MS-06-154 Thornycroft leaflet, ratings are as follows:

1500RPM 28BHP 7.36LPH, 2000RPM 37BHP 9.00LPH, 2500RPM 45BHP 10.95LPH, 3000RPM 50BHP 12.60LPH

Intermittent rating was 60BHP.

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