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Thornycroft 358, T358 & TA358

22 Products

22 Item(s)

Thornycroft 358, T358 & TA358

This is a listing of items that have been fitted to the Thornycroft 358, T358 and TA358 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.

The Thornycroft 358, T358 and TA358 engines are based on Cummins 6B engines.

  • The Thornycroft 358 uses the 6B series 6 cylinder, 4 stroke, vertical, inline 5.90L naturally aspirated diesel engine.
  • The Thornycroft T358 uses the 6BT series 6 cylinder, 4 stroke, vertical, inline 5.90L turbo charged diesel engine.
  • The Thornycroft TA358 uses the 6BTA series 6 cylinder, 4 stroke, vertical, inline 5.90L turbo charged, after cooled diesel engine.

A 300BHP version was also produced; the TA358/1.

This series of engines provided excellent performance, in a small, compact configuration. The legendary Cummins reliability meant the engines quickly became popular and many high performance pairs were fitted to larger performance power boats and fast fishing vessels.

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-01-358 Thornycroft 358 leaflet, ratings are as follows: 1500RPM 76BHP 14.5LPH, 1800RPM 90BHP 17.3LPH, 2200RPM 106BHP 20.8LPH, 2500RPM 115BHP 23.7LPH. Intermittent rating is shown as 115BHP.
  • From the MS-01-T358 Thornycroft T358 leaflet, ratings are as follows: 1900RPM 156BHP 29LPH, 2100RPM 166BHP 31.5LPH, 2300RPM 175BHP 34LPH, 2500RPM 180BHP 36.6LPH. Intermittent rating is shown as 180BHP, with a high output of 210BHP listed.
  • From the MS-01-TA358 Thornycroft TA358 leaflet, ratings are as follows: 2000RPM 210BHP 39LPH, 2200RPM 230BHP 42.5LPH, 2400RPM 245BHP 45.5LPH, 2600RPM 250BHP 47.8LPH. Intermittent rating is shown as 250BHP, with a high output of 250BHP listed.
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