Yanmar 1GM, Operation Manual

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2-b)
Raise the decompression handle to the "NO
COMPRESSION" position.
2-c)
Attach the starter handle with priming shaft as
the angle shown in the figure and turn the
starting handle hard, 5-6 times, and if the
flywheel gains momentum...
2-d)
Pull the decompression lever down to the
compression position. Turn two or three times
without stopping, and the engine will start.
2-e)
After starting return control lever from "FULL SPEED" to "SLOW SPEED"
[7-2.] Cautions after starting the engine.
1) Warm up the engine for more than 5 minutes. Because lube oil does not reach all the
moving parts as soon as the engine is started.
Operate the engine at around 850-900 rpm for at least five minutes.