I don't know if you are still in need of any help, but I recently installed a block heater to a 110. Here is what I can say. I used the zerostart brand. Seems to be well made, as stated likely the same as Deere only a longer cord, and less $. To remove the old plug I used long 1/2 extension, breaker bar, cheater bar on breaker bar, and some light cussing. Ended up changing coolant due to amount lost. Consider draining it first. Installation of new plug a little more fun, It's a 1 3/8 hex! found a crows foot and a wobble extension to be the way to go.