OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Rover Engines Suzuki Rover 2-stroke (M122X)

Hi all,

First time poster here. I've recently found and purchased an older Rover push mower with the Suzuki M122X 2-stroke engine. I'm absolutely stoked with the general condition, it's hardly been used, but has had some sun exposure. Unsure of the year of manufacture, if anyone knows the years the M122X engine was utilized, that would be interesting.

Main question though is about the M122X v. the far more common M120X; how different are these engines? Anyone know where I can get parts for the M122X? Does anyone know if the M120X carbi will fit the M122X? Otherwise, any recommendations as to where in Aust I can send my old / current carbi for rebuild? The fuel that was in the unused mower for many years has emulsified, the ooze is everywhere from the tank, through the carbi and in the cylinder. The mower was kept in Canberra so with the hot - cold seasonal cycles, expect all soft plastics / rubbers in the fuel system to be in need of replacement.

Thanks, and I apologise in advance if this has been covered previously, that thought just occurred to me and I'll search after I post this.

Hi Adam,

M122X possibly 1989 to 1994


M120X → nominal class ≈ 120 cc

M122X → nominal class ≈ 122 cc
121–122 cc (often quoted as 121.5 cc)

As far as I know

Parts are functionally M120X

Every confirmed M122X owner who has rebuilt one has found that:

carburettor

crank seals

ignition

piston & bore

gaskets

…match M120X specifications.

In practice, suppliers, rebuilders, and forums treat M122X = M120X for parts purposes.

From what I've read the carbies are different or jetting and governor linkage.

A local mower shop should be able to clean the carby or do it yourself,

Old mowers are cheaper than parts ,usually you can find one for $10. or thrown out ones in scrap metal.

Cheers
Max.