Stihl MS 290

4 MS 290, MS 310, MS 390
3. Specifications
3.1 Engine
MS 290 MS 310 MS 390
Displacement: 56.5 cm
3
59.0 cm
3
64.1 cm
3
Bore: 46 mm 47 mm 49 mm
Stroke: 34 mm 34 mm 34 mm
Engine power to ISO 7293: 3.0 kW (4.1 bhp)
at 9,500 rpm
3.2 kW (4.4 bhp)
at 9,500 rpm
3.4 kW (4.6 bhp)
at 9,500 rpm
Max. permissible engine speed
with bar and chain: 12,500 rpm 13,000 rpm 13,000 rpm
Idle speed: 2,800 rpm
Clutch: Centrifugal clutch without linings
Clutch engages at: 3,500 rpm
Crankcase leakage test
at gauge pressure: 0.5 bar
under vacuum: 0.5 bar
3.1.1 Engine (USA only)
MS 290 MS 310 MS 390
Displacement: 3.44 cu. in 3.6 cu. in 3.91 cu. in
Bore: 1.81 in 1.85 in 1.92 in
Stroke: 1.33 in 1.33 in 1.33 in
Engine power to ISO 7293: 2.8 kW (3.8 bhp)
at 9,500 rpm
3.0 kW (4.1 bhp)
at 9,500 rpm
3.2 kW (4.4 bhp)
at 9,500 rpm
Max. permissible engine speed
with bar and chain: 12,500 rpm 13,000 rpm 13,000 rpm
Idle speed: 2,800 rpm
Clutch: Centrifugal clutch without linings
Clutch engages at: 3,500 rpm
Engine leakage test
at gauge pressure: 7.25 psi
under vacuum: 7.25 psi