Engine family SMCIX.177XY2

What this record says

Sold in the US by

Mars Carts Inc.

Engine built by

Taizhou Nebula Power Co., Ltd

Vehicle category

Utility Vehicle - EPA Only

Certificate numbers

SMCIX.177XY2-006

What the number itself says

Reading SMCIX.177XY2 left to right: S is the model-year letter for 2025, MCI is the three-character code the EPA assigned to Mars Carts as certificate holder, X marks an off-road certification, .177 is the displacement in litres, so 177cc and XY2 is Mars Carts' own sequence for that year. Nothing in the number names the factory — that comes from the certificate itself.

The engine, as described on the certificate

The test vehicle Mars Carts submitted for this family (model XY200U-B) carried engine code XY163QML-B. In the Chinese engine-model convention that reads as one cylinder with a nominal 63 mm bore, QML series. Against the certified 177cc that implies a stroke of roughly 57 mm — a sanity check for a piston or cylinder listing, not a published figure.

The certificate describes a four-stroke, single-cylinder engine with 2 valves per cylinder fed by sequential multi-port fuel injection, with an oxygen sensor for closed-loop fuelling, run by an engine control module (ECM). There is a catalytic converter in the exhaust, recorded as "Three Way Catalyst (TWC), single-bed, closed-loop warm up".

Rated power on the record is 6.5 kW (about 9 hp) at 6,500 rpm, driving through a CVT (belt and variator).

Engine code on test vehicle

XY163QML-B

Nominal bore (from the code)

63 mm · implied stroke ≈ 57 mm

Cylinders / valves

1 · 2 per cylinder

Cycle

four-stroke

Fuel delivery

sequential multi-port fuel injection

Oxygen sensor

yes (closed loop)

Engine control

ECM

Catalytic converter

Three Way Catalyst (TWC), single-bed, closed-loop warm up

Rated power

6.5 kW (≈9 hp)

Rated speed

6,500 rpm

Transmission

CVT (belt and variator)

Sales area

49S

Vehicle built by

Taizhou Nebula Power Co., Ltd.

Test vehicle model

XY200U-B

Filing history and where it was sold

Mars Carts filed one certificate under this family, for model year 2025, sold as 49-state (not certified for sale in California).

The vehicle itself is recorded as built by the same company, Taizhou Nebula Power Co., Ltd. in China — engine and chassis from one source.

Certified emission levels: CO 6.3, HC 0.3, HC+NOx 0.8 g/km.

Other records carrying the same engine code

Mars Carts certified an engine with this code under 5 other family numbers — the same engine filed again in another year, or in an off-road and a street version:

• MMCIX.177XY2 (2021)
• NMCIX.177XY2 (2022)
• PMCIX.177XY2 (2023)
• RMCIX.177XY2 (2024)
• TMCIX.177XY2 (2026)

Other certificate holders whose test vehicle carried the same engine code:

• Massimo Motor Sports, LLCLMMMX.177XYD2020 · same engine factory
• Massimo Motor Sports, LLCKMMMX.177XYD2019 · same engine factory

A shared code from the same factory is a strong search lead. From a different factory it is as often a naming coincidence. Either way it narrows the search; it does not settle it — measure before you buy.

Models certified under SMCIX.177XY2

Every model designation the importer listed on this certificate. If your machine's model name appears here, this is the right record — even if the name on the bodywork is slightly different.

Bighorn 200 EFI · Bighorn 200 EFI G · Bighorn Outrider HL · Bighorn Outrider HLG · Bison 200 · Bison 200P · Bison 200U · SRU200 · SRU200U · Taurus 200E GV · Taurus 200E GX · Taurus 200E U · XY200U-B · XY200U-BL · XY200U-BL(GVX)

Other American badges on engines from the same factory

• Taizhou Nebula Power Co., Ltd · 450cc3 American brands · 2019–2026
• Taizhou Nebula Power Co., Ltd · 180cc4 American brands · 2015–2026