Yanmar 4BY - 6BY Manuals, specs and bolt torques

4BY/6BY
Step 1 = 22 Nm, 16 lb.ft
Step 2 = 90 degrees

4BY/6BY
Step 1 = 5 Nm, 3.66 lb.ft
Step 2 = 20 Nm, 14.75 lb.ft
Step 3 = 70 degrees

4BY/6BY
Step 1 = Tighten all bolts
80 Nm, 59 lb.ft
Step 2 = Loosen all bolts at least
180 degrees
Step 3 = Tighten all bolts
50 Nm, 37 lb.ft
Step 4 = Tighten an additional
90 degrees
Step 5 = Tighten an additional
90 degrees

Displacement
4BY150/150Z/4BY180/180Z
1.995 liter

6BY220/220Z/6BY260/260Z
2.993 liter

Bore
4BY150/150Z/4BY180/180Z
84 mm

6BY220/220Z/6BY260/260Z
84 mm

Stroke
4BY150/150Z/4BY180/180Z
90 mm

6BY220/220Z/6BY260/260Z
90 mm

Arrangement
4BY150/150Z/4BY180/180Z
4 cylinder in line Turbocharged

6BY220/220Z/6BY260/260Z
6 cylinder in line Turbocharged

Power
4BY150/150Z
110 kW, 150 hp @ 4000 rpm

4BY180/180Z
132 kW, 180 hp @ 4000 rpm

6BY220/220Z
162 kW, 220 hp @ 4000 rpm

6BY260/260Z
191 kW, 260 hp @ 4000 rpm

Dimensions
approx
4BY150/150Z/4BY180/180Z
length = 861 mm
width = 670 mm
height = 721 mm


6BY220/220Z/6BY260/260Z
length = 1001 mm
width = 670 mm
height = 721 mm


Weight
4BY150/150Z/4BY180/180Z
Approx
Dry
250 Kg
Wet
270 Kg

6BY220/220Z/6BY260/260Z
Dry
310 Kg
Wet
340 Kg