Z5424 how do I change the pump belt

[Johnybztr]

Any pointers would be great I have a z5424 3 years old I need to change the pump belt it looks like I have to drop the pulley down but when I try to lossen the bolt the engine turns what is the best way to prevent that?

 

[Ifixdit]

Any pointers would be great I have a z5424 3 years old I need to change the pump belt it looks like I have to drop the pulley down but when I try to lossen the bolt the engine turns what is the best way to prevent that?

One method of preventing the engine from turning is to remove the spark plug and turn the engine till the piston is at BDC, or at the bottom. Then take a thick piece of rope that will just fit in the spark plug hole and feed it into the cylinder (the more you can feed in the better). Next, rotate the engine by hand until the piston starts to come back up. Once the piston compresses the rope it will lock in place and you can remove the bolt. Some people will say it's taboo to put anything foreign into the cylinder, but to each his own. It works. Good luck!