Donna,

Your husband is big enough that he should be able to make some one else mow the lawn for him.

The specs I've seen mention towing limitations as half the weight of the tractor but I can't recall seeing a driver weight limit.

I would contact the manufacturer directly with the driver weight question and if they can't give you a definitive answer move on to another brand.

Try to shop locally with a full service authorized dealer and make them bring the model you're considering to the house for your husband to test drive. He might not even be able to fit on quite a few and that would be a quick answer.

LOL yes he is big enough to make anyone do as he wishes but he doesn't like to THROW his weight around... ;)
Thanks for the advice we'll check with manufacturers.