"Hal Rosser" wrote in
:

I have also heard of buying a new chain and bar for your chainsaw,
then using the OLD one to cut a path through the yard.

In this part of the world, you can rent a Ditch-Witch or Trench-Wench which
use a similar concept, but the chain carries cutters designed for earth and
rocks rather than one designed for wet timber.

Ditch-Witchs and Trench-Wenchs aren't very good for cutting trees, nor are
chainsaws very good for digging trenches.

You don't have to invent a new tool for this application, plumbers and
electricians have been inserting narrow conduits / pipes in earth trenches
for decades using these types of machines.

An alternative to renting a machine may be to find a plumber who
specialiese in in-ground sprinkler systems... and get a quote for him to
dig your trenches.

Owen