amplifier needs

I am looking for an amp that will power 2 small outdoor speakers to a screened porch on one side of my home and also 2 small speakers in the pool area which is adjacent. The cable run is probably 25 feet in both directions. I've got a really nice Sansui G9000 at 160W that is a spare amp but I don't want to mess it up if the load would be beyond it's capability. Any suggestions you more knowledgeable guys might give me would be appreciated