Chris-Marine AB has launched a new Liner Diameter Measurement Instrument (LDM) in order to quickly investigate the condition in cylinder liners for 2-stroke engines. The main advantage of this new LDM is that the cylinder head or exhaust valve housing does not need to be removed. By replacing the traditional internal micrometer, the LDM is inserted in the liner through the scavenging ports. The LDM can be preset with engine data for most of today’s existing 2-stroke engines, weighs 3.6 kg and is suitable for 2-stroke liners with a bore between 500 – 980 mm.