In my opinion durability and serviceability are equal. Although Lycoming no longer produces N/D engines, they are fully supported from a parts perspective. So to me, there isn't a real reason not to go either way. The N/D engine weighs about 1 pound more then the W/D like accessories and configuration, so weight shouldn't be an issues either.
Of course N/D engines have been around for longer calendar time then W/D, so as with any engine purchase, a good review of the engine's history is necessary to ensure that you know what you are getting as far as an engine core is concerned.
Good Luck,
Mahlon
"The opinions and information provided in this and all of my posts are hopefully helpful to you. Please use the information provided responsibly and at your own risk."
