Mitsubishi 4DQ50 Service Manual page 55

run at max. speed when Venturi opening is 100"..6. It should
be
noted that the
governing efficiency depends much upon how the air system is, especially
whether or not it is perfectly air-tight.
3) Engine speed should be measured under no load in Model 4DQ50 engines
intended for motor vehicles and construction machines, non· load max. speed is
5-10% over the rated speed.
4) How to measure engine speed.
In case of hourmeter equipment with engine, pick up the hourmeter and equip
a special parts (Fig. 3-34) and measured by tachometer. In this case,
tachometer indicates 1/2 engine r.p.m.
30498-01100
30498-01000
30425-325
\ Camshaft
, Oil,pump dri ve shaft
Fig. 3-34
Fig. 3-34'
- 47-
306Z5
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SElf VICE METER