looking to buy a ddt , talked to owner on the phone and he couldn't find part number on it , my service manual say's it should be 91-823686a2 , but he did have the right software for it , number 91-880118a03 , as for reference manual , my manual say's part number 90-8811204--1 or 90-881204003 , but he has numbers 90-825159-4 and -3 , do you think this will work for me ? my motor number is ot556519 , thank you
