1/3 c. catsup
1/3 c. oil
1/4 c. brown sugar
1/4 c. vinegar
1 1/2 tsp. chili powder
1 1/2 tsp. salt
1 tsp. onion powder

Put ribs, about 4 pounds, in large bowl with above ingredients. Marinate overnight.

Prepare smoker according to directions. Cook ribs 6 hours. Heat reserved marinade to boiling and serve over ribs.