Engine serial number and type

GX. 160U1 - QXE4 - OH

V : Vertical output shaft
H : Horizontal output shaft
. : No digit = horizontal

GX: OHV or OHC engine - Professional use

GS: OHC engine - Semi Professional use
GC: OHC engine - Consumer use
GD: Diesel engine
G: Side valve engine
GK: Side valve engine, kerosine use engine

GX160U1 - QXE4 - OH

Engine displacement (arrounded) cm3

GX160U1 - QXE4 - OH

Unified type

GX160U1 - QXE4 - OH

Indication of minor model change

GX160U1 - QXE4 - OH

OUTPUT SHAFT TYPE (PTO)
Q : Straight, imperial (inch)
S : Straight, metric (mm)
W : External threaded
V : Tapered
H : 1/6 reduction
R : 1/2 reduction + clutch
L : 1/2 reduction

The following two digits in the MTOC code can be individualised and are not linked to a systematic coding.

GX160U1 - QXE4 - OH

X : Oil alert 

GX160U1 - QXE4 - OH

E : Electrical start 
M : Oilbath aircleaner 
C : Cyclon aircleaner

GX160U1 - QXE4 - OH

4 : European specification 

GX160U1 - QXE4 - OH

COLOUR CODE
OH : (R280) Bright red
SD : (NH1) Black
Others ...