Suzuki DF 25 Service Manual page 196

ENGINE HOLDER TO OIL PAN
Install gasket 1 and oil relief valve 2 to engine holder 3, then
tighten valve securely.
Oil relief valve : 27 N . m ( 2.7 kg-m, 19.5 lb.-ft.)
Apply engine oil to O-ring 4, then install O-ring 4 to oil strainer
5.
Install oil strainer 5 to engine holder 3, then tighten bolts 6
securely.
Apply engine oil to O-ring 7.
Install O-ring 7 and oil pump 8 to engine holder 3, then tighten
three bolts 9 securely.
Install dowel pin 0 and gasket A to oil pan.
Do not re-use gasket. Always assemble with a new gas-
ket.
Install engine holder 3 to oil pan, then securely tighten it with
engine holder bolts B.
Engine holder bolt : 23 N . m (2.3 kg-m, 16.5 lb.-ft.)
MID UNIT 8-17