OK, the follow up. Sorry for the delay. Craziest thing, again my dad replaced the seat sensor and filter then tried to start it a few more times then loading it on the trailer. We get to the repair shop, unload it and the guy comes over to ask the normal questions. Are you ready:confused2:...he sits on it and cranks it...and yes, it starts right up! After the laughing and head scratching was over, he mentioned it could have been something clogged in the fuel line. It's been working fine ever since. I don't know if this helps or not but I do want to mention again that this is a great site with very helpful kind members. I'm going to mention it to everyone who needs help. Thanks again folks.