My Seneca V (Continental TSIO-360-RB) has been very hard to start
during cold weather for the past few winters I have owned it. Besides
burning out several starters I have tried tune-ups prior to winter and
installing the Slick Shower of Sparks ignition system.

We had this problem with a Lycoming IO360 and regapping the plugs helped
quite a bit. Maybe new plugs might be in order. Of course a good pre-heat
is also a very big help.

Kobra