Small Engine Troubleshooting Problems? Ask a Mechanic Now.
When you replaced the engine, did you get the belt for the electric clutch back in line? when hydraulic belt is running, it is smooth or is it vibrating? Belt alignment is the critical factor on drive belts, and the correct belt has to be used. Does belt snap on engagement or under operation? If at engagement, the hydraulics may be under load, and not in neutral.