In Summary
• The most common rotisserie mistakes are an off-centre load and coals placed directly under the meat, which together cause most uneven cooking and flare-ups.
• Before lighting the fire, check that the meat is tight and balanced on the spit and that its weight sits within the motor’s rating.
• Hold a steady medium heat with pre-lit top-ups through the cook, and use a thermometer to decide when the meat is done.
The two most common rotisserie mistakes are loading the meat off-centre and putting the coals directly underneath it, and between them they cause most of the uneven cooking and flare-ups that spoil a spit roast. Both are easy to fix before you light the fire. Below are the ten mistakes we see most often, along with what to do about each one, so your next roast turns out evenly cooked from end to end.
Loading the Meat Off-Centre
An unbalanced load is the classic rotisserie mistake. If the spit rod runs off to one side of the meat, the heavy side drops with every turn, which jerks the motor and leaves one side closer to the heat for longer. Run the rod as close to the centre of the meat as you can, then turn the spit by hand before lighting the fire. If it keeps settling with the same side down, reposition the meat or add a counterweight until it rotates smoothly.
Loose Forks and Trussing
Meat shrinks as it cooks, so forks that feel firm at the start can work loose an hour in. Once that happens, the rod can spin freely inside the meat, leaving the same side facing the heat. Push the forks in deep and tighten them firmly, and it is worth checking them again after the first 30 minutes. Truss chickens and tie up any loose flaps on larger cuts so wings and thin edges do not dangle into the heat and burn. A square spit rod also grips far better than a round one.
Overloading the Motor
Every rotisserie motor has a weight rating, and pushing past it is a quick way to stall the spit or burn out the motor mid-cook. Check the rating before you buy your meat and leave some headroom, especially for a whole lamb or pig that may not sit perfectly balanced. If your load is close to the limit, a counterweight takes some of the strain off.
Coals Directly Under the Meat
Fat drips steadily as a spit roast turns, and if there are hot coals directly beneath it, that fat catches fire. The resulting flare-ups blacken the outside long before the inside is cooked. Bank the coals to the sides or behind the meat and set a drip tray underneath to catch the fat. The rotation will still cook every surface evenly.
Too Much Heat Too Soon
A big, roaring fire might look like a shortcut, though it usually leaves you with charred skin over undercooked meat. For most cooks, 160 to 200°C at the level of the meat is the right range, with whole lamb and large roasts at the lower end and chicken at the upper end. Start your coals in a chimney and wait until they are covered in grey ash before the meat goes on, so the cook begins on steady heat.
Letting the Fire Run Down
A long spit roast burns through a lot of fuel, and running out halfway through stalls the whole cook. Keep a chimney of coals lighting on the side and add them every 30 to 60 minutes to hold your temperature. Always add coals that are already lit, because cold coals dropped onto the fire dip the temperature and give off a harsh smoke before they catch. Have more charcoal on hand than you expect to need, particularly for a whole lamb.
Saucing Too Early
Glazes and sauces with sugar or honey in them burn quickly over charcoal, especially as the meat turns past the hottest part of the fire. Brushing them on at the start leaves a bitter, blackened crust by the end. Use a dry rub or a simple oil and herb baste for most of the cook, and save sticky sauces for the final 15 to 20 minutes.
Cooking to the Clock
Cooking times help you plan the day, although size, shape, wind and the strength of your fire all change how long a spit roast actually takes. A meat thermometer in the thickest part of the meat, away from the bone, gives you the real answer. Chicken and other poultry should reach 75°C, the safe cooking temperature for poultry recommended by healthdirect, while the shoulders and legs of a whole lamb are at their pull-apart best at 75 to 85°C.
Carving Straight Off the Spit
Meat carved the moment it comes off the heat loses its juices onto the board. Give it a rest, loosely tented with foil, for around 10 to 15 minutes for a chicken and 20 to 30 minutes for a whole lamb or large roast. The meat stays hot while the juices settle back into it, which makes every slice moister.
Forgetting About the Wind
Wind strips heat away from the meat and makes coals burn hot and fast on one side, which leads to uneven cooking and extra fuel use. Set up in a sheltered spot or behind a windbreak, and expect a longer cook and a bigger charcoal bill on a blustery day.
FAQs
Why does my rotisserie motor keep stopping?
The load is usually too heavy or off balance. Re-centre the meat on the rod and check its weight against the motor’s rating. If one side still keeps dropping, a counterweight will help.
Why is my spit roast cooked on one side and raw on the other?
This usually points to poor balance or uneven heat. An off-centre load lingers with its heavy side down, and coals banked more heavily on one side or a strong wind will cook that side faster.
Should the coals go directly under a rotisserie?
It is best to keep the coals to the sides or behind the meat with a drip tray underneath, because coals directly below cause flare-ups from the dripping fat.
How often should I check a spit roast?
Check the forks after the first 30 minutes and top up the coals every 30 to 60 minutes. Beyond that, leave it to turn, and start checking the internal temperature as you near the expected finish time.
A Last Word
Most rotisserie mistakes happen before the fire is even lit, so a few minutes spent balancing the meat and setting up the coals pays off for the rest of the cook. From there, a steady medium heat and a good thermometer will see you through to an evenly cooked spit roast. Browse our range of rotisseries and accessories to get set up for your next cook.
Glossary
• Counterweight: A weight fitted to the spit to balance an uneven load and ease strain on the motor.
• Weight rating: The maximum load a rotisserie motor is designed to turn.
• Spit forks: The pronged clamps that hold the meat firmly in place on the spit rod.
• Indirect heat: Coals placed to the sides of or behind the meat, leaving the area directly beneath it clear.
• Flare-up: A burst of flame caused by fat dripping onto hot coals.
• Resting: Leaving cooked meat to sit before carving so the juices settle back into it.