Thanks for the reply.

The mower looks brand new and I do look after it. It has only 65 hours use so whether the yard is 2.5 acres or 6, seems irrelevant. I never mow more than 1 or 2 acres in one day. I only mow the slopes 4 times a year which takes about 4 hours (1 tank of gas). I know the L100 would do the job on it's ear but I thought the bigger unit would be OK / better. Do you know of a unit that would be OK for hill work, Any brand or model. I am concerned that the Hydro will fail again and it will not be covered by warranty.

Thanks again for your comments