How do you change belts on Montgomery ward tiller model gil-1580b?

To change the belts on a Montgomery Ward tiller model GIL-1580B, first, ensure the tiller is turned off and disconnected from any power source. Remove the engine cover by unscrewing the bolts, then locate the belts and their tensioners. Loosen the tensioners to relieve tension on the belts, remove the old belts, and replace them with new ones, ensuring they are properly aligned. Finally, re-tension the belts, reassemble the cover, and secure all screws.