Timeout systemctl systemd

systemctl cat


Then you need to create a {service}.service file to override your settings with information from [Service] section from systemctl cat {service} command and restart daemon after that:
echo "[Service]

TimeoutSec=15min

ExecStart=/etc/rc.d/init.d/ start

ExecStop=/etc/rc.d/init.d/ stop

ExecReload=/etc/rc.d/init.d/ reload" > /lib/systemd/system/{service}.service

sudo systemctl daemon-reload

Timeout set by systemd

systemctl show SERVICE_NAME.service -p TimeoutStopUSec