I'm searching to see if Snapper's older RER's serial numbers and model numbers have any significance. I have what I originally thought to be a '74 model but am now wondering if it's a '73 instead. The model number is 2650 with a serial number of 307707. Does this indicate it was built in '73, is a 26" cut with a 5hp engine? Original engine has been replaced/upgraded to a 8hp Tecumseh but if I remember correctly, I was told it originally had a 5hp engine.