(Weifang phone manufacturers ship 138646--00749) Weichai Power generation unit 6113/6105/4105/4100 engine assembly with flame combustion starting bogey. Don't put the air filter removed, use cotton dipped in diesel ignited in the air inlet pipe made of kindling implement combustion promoter. So in the starting process, the outside dust air will not be filtered and directly into the cylinder, causing the piston, cylinder and other parts of the abnormal wear, but also will cause the engine to work rough, damage to the machine.