4 cylinder 4 stroke air cooled engine with opposed cylinders,hydraulic valve tapped,automatic carburetor,mechanical fuel pump,magneto single or magneto-electronic dual ignition,wet sump pressure lubrication.

S1800UL是一款四缸四冲程风冷发动机，带有对抗气缸，分接液压阀，自动化油器，机械燃油泵，单电磁或电磁-电子双点火，吹扫型加压润滑。

Maximum Power最大功率：50KW/68HP at 3200rpm

Continues HP连续马力：48KW/65HP at 3000rpm

Displacement排量：1835cm³

Bore缸径：92mm

Stroke行程：69mm

Compression ratio压缩比：8.5:1

Ignition dual双点火：Magneto/Electronic

Spark plugs火花塞：BERU 14-7DU/BOSCH W7DC

Firing Order点火次序：1-3-2-4

Firing point着火点：25°BTDC

Carburetor化油器：Altitude compensation

Starter启动器：12V-0.8KW

Generator发动机：14V-200W

Oil pressure油压：Max. 4.5 bar,min 2 bar at 2500rpm

Oil temperature油温：Max 120℃,min 50℃

Oil capacity油容量：3ltrs

Cylinder head temperature缸温：Max.220℃

Propeller drive螺旋桨驱动方式：Direct,anti-clockwise

Weight approx.重量约：63KG

Type Certificate No.型号证书号：4590/UL