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238 & T238


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This is a listing of items that have been fitted to the 238 and T238 engines throughout production. We hope this page will help you; if you do not see what you are looking for, please contact us. We may be able to help.

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.

Gasket sets listed do not contain gaskets for marinisation components.

Requests for Thornycroft spares should always be accompanied by the engine number / build list.

Both the Thornycroft 238 and T238 are based on Cummins 4B engines.

The 238 uses the 4B series 4 cylinder, 4 stroke, vertical, inline 3.92L naturally aspirated diesel engine.

The T238 uses the 4BT series 4 cylinder, 4 stroke, vertical, inline 3.92L turbo charged diesel engine.

These four cylinder engines provided excellent performance, in a small, compact configuration. The legendary Cummins reliability meant the engines quickly became popular, being fitted singularly and in pairs in a wide range of leisure and commercial craft.

The first engines produced had Cummins base engines and Thornycroft components. These were painted in the trademark Thornycroft blue, This changed to white per builders requests. The final units were based on the full Cummins marine engines, and badged by Thornycroft. Again, these units were white.

From the MS-01-238 Thornycroft 238 leaflet, ratings are as follows:

1500RPM 52.5BHP 10.2LPH, 1800RPM 61BHP 12LPH, 2200RPM 71BHP 14.4LPH, 2500RPM 76BHP 15.5LPH

Intermittent rating is shown as 76BHP, with a high output of 80BHP listed.

From the MS-01-T238 Thornycroft T238 leaflet, ratings are as follows:

2050RPM 110BHP 21.2LPH, 2300RPM 122BHP 23.2LPH, 2500RPM 130BHP 24.8LPH36.6LPH

Intermittent rating is shown as 130BHP, with a high output of 150BHP listed.

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