Starting Up The Engine For The First Time And Running In - Compact Radial Engines MZ201 Instruction And Maintenance Manual

STARTING UP THE ENGINE FOR THE FIRST TIME AND RUNNING IN

The first time you start it up, run the engine at 2000 - 2500 rpm for the first 15 - 20 seconds, then run it at
the lowest revs (1500 rpm) for a few seconds, before stepping up the revs to 3000 - 3500 rpm. At this point,
we recommend running in the engine before using it, pushing the engine to its full potential. Part of the
running in process can be carried out in flight. If you choose to do so on the ground, ensure the engine is
bolted securely in position.
• Start the engine and run it at 2500 to 3000 rpm for 5 minutes, then step up the revs to 4000 rpm for one
minute before dropping to 3000 rpm.
• Repeat the process, increasing the revs to 4000.
• Settle at 4500 rpm for 5 minutes, then drive the engine to the maximum revs for 10 seconds before
returning to 3000 rpm.
• Repeat the above process, running the engine at maximum revs for 20 seconds.
• Repeat the above process, running the engine at maximum revs for 30 seconds.
• Settle at 3000 rpm for 5 minutes, then at 4000 rpm for 5 minutes, then run at the maximum revs for one
minute and return to 3000 rpm.
• Run for 2 minutes at max. revs, then drop to 3000 rpm.
• Run for 5 minutes at 4000 rpm, then 3 minutes at max. revs, return to 3000 rpm for 2 minutes, then cut
off the power supply and stop the engine.
During the above operations, check that the temperature of the cylinder head never exceeds 260°C (500F)
During the running-in, it is particularly dangerous to increase the quantity of oil if you are using Castrol
TTS. An excessive amount of oil will cancel the benefits of running-in the engine.
During the first few hours of use, never apply full power for prolonged periods, but just for a few minutes
during take-off. By running-in the engine thoroughly, you will prolong its life-span. The engine will loosen
up and function at full power after approximately five hours.
Any irregularities in the engine speed may be caused by a badly adjusted carburettor.
After the first hour of use, check that all bolts are tightly fastened in accordance with the torque settings
given in the table on page 7.
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