Honeywell zone valve

I have just installed a new honeywell V8043G1158 zone valve only to find out that it doesn't work . The gear is slipping when the motor turns to open the valve . My question is will the motor and base off a V8043G1125 fit . I have a couple of the V8043G1125 here not being used and can't get a V8043G1158 . It has to be ordered in and will take a couple of weeks . Can someone explain what the numbers on the zone valves mean ? I am not a furnace / boiler man so excuse my questions if they are stupid . This is my own system and I am trying to put my upper floor on 2 zones instead of the one that was there when the house was built .