How long to smoke a 4 lb pork shoulder
Short answer
Six to seven hours at 225°F (107°C), plus at least an hour of rest. It is done at 203°F (95°C), when a probe slides in with no resistance and the blade bone twists free — not at a time on the clock.
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Your results
Smoking time
6 h 17
Rest
1-2 h
Target internal temperature
203°F / 95°C
Add a buffer of
2 h
Ninety-five minutes per pound at 225°F is the planning figure, so a 4 lb shoulder is a six-and-a-half-hour cook. Add an hour of rest and an hour of slack and you have your start time: for a six o'clock dinner, the meat goes on at nine in the morning.
A 4 lb shoulder is a half cut — most whole pork butts run 8 to 10 lb. That matters because smaller cuts dry out more readily: less mass, more surface per pound, and the same hours of moving hot air. Keep the fat cap on and put it fat side up, so what renders runs down through the meat.
The stall will happen somewhere around 160°F (71°C) and it will last two to three hours. This is not the smoker failing. Moisture evaporating off the surface cools the meat at almost exactly the rate the fire heats it, and the internal temperature simply stops. Wrapping in foil or butcher paper pushes through it in about half the time; not wrapping gives a better bark. Both are correct answers to different questions.
Pull it apart while it is still hot, and put some of the rendered juice back in. The liquid in the bottom of the pan is the difference between pulled pork and dry shredded pork, and it is the step people skip because the meat already looks finished.
Related questions
Can I smoke a 4 lb shoulder faster at 275°F?
Yes — about four and a half hours instead of six and a half. The bark is slightly less developed and the smoke flavour lighter, but the meat is just as tender. It is a reasonable trade when the day is short.
Fat side up or down?
Up, on most smokers, so the rendering fat runs through the meat. Down if your heat comes from directly below and you need the fat as a shield.
How much pulled pork does 4 lb make?
About 2 lb (900 g) of finished pulled pork, which feeds six to seven people. Pork shoulder loses roughly half its weight to fat, bone and moisture.