A rotisserie will typically be designed to hold between 15 and 20 pounds. Smaller rotisseries may only be equipped to comfortably hold 10 pounds. A large rotisserie grill will generally hold a midsized turkey, but might not be able to handle a large one.
If you overload the rotisserie spit, it will often bend and can break. If it’s too heavy, the spit may not be able to turn properly, meaning the food won’t be cooked correctly.
Sometimes, you may need to add weight to the rotisserie using the counterweight. This balances out unusually shaped cuts of meat, so that the spit can rotate smoothly. The counterweights should be factored into the total weight that the rotisserie can support.
To be sure of the weight your rotisserie will hold, check the user's manual. This will give you the exact specifications for your grill.