McDonald SE Hvid Diesel

2HP @ 600RPM

Manufactured in 1944 by A.H.McDonald & Co. Imperial Engine Works, Melbourne, Victoria.

The SE was first made in 1939 at number 1527SE and the last in 1950 at number 5170SE. Commercial production of all McDonald engines date from July 1st, 1904 through to 1969.

From 1918, McDonalds switched production to diesel engines, either using the Hvid (pronounced 'VEED') fuel vapourising system or hot bulb ignition. The advantage of the Hvid or Brons system as it was sometimes called was that it could use any heavy 'distillate' as fuel, from kerosene to crude oil. McDonalds maintained this was cheaper and easier for the farmer and argued that the system did not require specialist mechanical skills as it was simple and easy to repair. In practice, the system requires minute and careful calibration and can be quite difficult to set correctly. These engines are started on kerosene and then switched over to diesel. Each engine seems to be unique and following the standard factory Instruction Manual exactly as printed does not always guarantee success. However, once set, the engines run successfully. McDonald Imperial Super-Diesel engines have a distinct exhaust note both at idle and under load but observers are advised not to stand too close to the engines when working - oil residue can leave the exhaust.