Petter SS4
Object ID14
Works No4RA504
Accession NoIF:2003:003
StatusNot On Display
Category Engine
Collection IDPetter Collection
Made ByPetters Ltd
Made InYeovil, England
DescriptionFour cylinder supercharged two stroke vertical diesel.

This engine is held in store at the moment but we hope that it will eventually be used to restore the second engine in the Knocker White tug currently at The Museum of London. Fitted with two SS4 Petter engines, probably the only remaining installation of its type.

LocationPower Hall 2
ConditionIn Storage


From Longford Mills, Stroud, Gloucestershire. Last used for driving a 3 phase genset to provide power at the mill. SS 4RA504 (576 HP) was originally despatched from the Factory 31.3 1947. Sent to Mc Call Bros of Trowbridge, Wiltshire. Engine was sent with a Compressor set eng no 51340 comp set NC16586. Wedge type pistons fitted on 26.7.1950.


Engine transferred to Trinity Buoy Wharf for possible use in Knocker White (or display)

Conservation/ Maintenance History
Initial Report

Arrived from Longford Mills minus flywheel, outrigger bearing, oil cooler and various minor parts

Cosmetic and Other Work

Because of the general state, covered in builder rubble etc the engine was cleaned and painted. A frame was built and using components from a beyond repair twin cylinder the engine was built up into a displayable condition. Minor work still needed to fuel system and governor rods.

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