Preheat an outdoor grill for medium heat and lightly oil the grate.
Place potatoes into a microwave-safe bowl with water, cover, and cook on high power until tender, about 8 minutes.
Cut each smoked sausage rope into 5 pieces. Chop each onion and bell pepper into 10 chunks. Separate the onion chunks in half.
Thread onion, potato, sausage, 3 bell peppers, sausage, potato, and onion onto a metal skewer, in that order. Repeat with remaining skewers. Add remaining potatoes to each skewer.
Place kabobs on a plate and drizzle generously with olive oil and season with salt and pepper.
Cook kabobs on the preheated grill, with the lid open, for 3 minutes. Turn heat to low and close the lid for 3 minutes more. Flip kabobs and cook, with the lid closed, for 6 minutes more. Remove to a serving platter.