Per the tech manual, clockwise until it stops, then back 1 1/4 turns.
68.7cc the super is 72
The Stihl 038 chainsaw was first introduced in 1973. It became a popular model for both professional and residential users due to its reliability and performance. Production of the 038 continued until the late 1980s, during which it underwent various updates and improvements.
With Stihl most Super models have a piston diameter that is 2 mm larger than the other version of the same model. The Super is still an AV otherwise as that stands for anti-vibration, which means that it usually has four shock mount buffers between the engine and handle
Stihl 38 Magnum only: Displacement: 72.2 cm3 (4.4 cu.in). Power: 3.6kw (4.8 hp). Weight (dry, without bar): 6,6 kg (14,6 lb). Bar: 40 cm (16 in) standard guide bar, optional 37, 45 and 50 cm (14.5, 18, 20 in). Noise: 113 db. Chain: 3/8 (9.32 mm)pitch, 1.6mm (0.063 in) drive link gauge. Fuel tank capacity: 0.68 l. Oil tank: 0.36 l. Spark plug M14.5x1.25, 9.5 mm (0,37 in). Maximum engine speed 13500 rpm, idle 2500 rpm. Regular 038: power: 3.3 kw, displacement: 66.8 cm3. Other data is the same as above.
Stihl 38 Magnum only: Displacement: 72.2 cm3 (4.4 cu.in). Power: 3.6kw (4.8 hp). Weight (dry, without bar): 6,6 kg (14,6 lb). Bar: 40 cm (16 in) standard guide bar, optional 37, 45 and 50 cm (14.5, 18, 20 in). Noise: 113 db. Chain: 3/8 (9.32 mm)pitch, 1.6mm (0.063 in) drive link gauge. Fuel tank capacity: 0.68 l. Oil tank: 0.36 l. Spark plug M14.5x1.25, 9.5 mm (0,37 in). Maximum engine speed 13500 rpm, idle 2500 rpm. Regular 038: power: 3.3 kw, displacement: 66.8 cm3. Other data is the same as above.
Engine: Fan cooled STIHL two-stroke engine with specially coasted cylinder bore.Displacement: 72.2 cm3Engine Power: 3.6kw - 4.9 hpWeight of power unit: 6.6kgFuel Tank Capacity: 680cm3Chain Oil Capacity: 360cm3Mixture: 1:25 or 1:50 when using STIHL two-stroke engine oil.Electronic ignition system, dust-tight sealed.All position diaphragm carburettor with integral fuel pump.Bar Lengths: 40, 45 and 50cm
You did not say if 4 or 6 cylinder but here is what my service manual has 4cyl Champion RC12LYC .033-.038/ 6 cyl carb Champion RFN14LY 6 cyl fuel injected Champion RC9YC both 6 cyl gap .033-.038
038%
.038
.038
38/1
.038