Simplex provides extensive support for the Wärtsilä Nohab WN 25 engines both in terms of service engineers as well as spare parts. These parts are sourced from leading specialist component manufacturers all of which are based in Europe, and are covered by our 12 month guarantee for major items. This guarantee is supported by our £5 million product liability insurance. The parts which we can supply include all the normal wear items expected for a major overhaul such as:
The Wärtsilä Nohab WN 25 is the successor engine to the Nohab Polar F10-F30. Production commenced in 1997 and continued until 2007. All the engines were manufactured at the historic site in Trollhättan and when production ceased a fine tradition came to an end. All engines were single acting, four-stroke, turbocharged engines. Most of the engines were compression ignition engines operating either on diesel fuel or heavy fuel. However a gas version of the engine was developed and this was successfully sold around the world for land based power stations. Like the previous F series engines the bore size was 250 mm and the stroke 300 mm.
These engines were produced in different configurations both as in-line engines with six cylinders and in V form as eight, twelve and sixteen cylinders. The normal way of designating these engines was:
For the compression ignition engines: 6R25 for a six cylinder, 8V25 for a eight cylinder, 12V25 for a twelve cylinder and 16V25 for a sixteen cylinder.
For the spark ignition engines the same designations were used but the generic name for the model was altered so that the WN25 became the WN25SG.
The engines are robust and most are still operating. They proved to be popular as propulsion units in the offshore industry, as well as in tugs, coastal vessels and other smaller craft. There are also many installed as power generating sets both compression ignition versions and spark ignition versions.