For me, sericing my own engine was a BIG part of getting a Wren 54 (and also building my own KJ66). Why pay someone $60 to $75 US per hour, to change a few bearings? You can dissassemble the engine, replace the bearings and reassemble in a few hours, and save yourself (a) a few hundred dollars and (b) having to pack up your engine and ship it somewhere.

It is definitely NOT for everyone, though, you better have at least a bit of mechanical ability. I know a few guys I dont think can tighten a prop nut the right way, to then I would say buy a preassembled engine.

But if you are interested in the internals and seriously think you can service it, go for it, you will save big $$ in the end.

For instance, if you consider how many guys burn out starter motors and have paid big bucks to get them serviced (not just parts but its the labour rate that gets you, just like fixing your car/truck) you can easily do it yourself and save $$.

Thats Just my way of looking at it.

AJC