General Specifications; Snowmobile Identification; Recommended Gasoline And Oil; Engine Break-In - Arctic Cat Sno Pro 120 Service Manual

General Specifications

 NOTE: General specifications for each 2012 Arctic
Cat Snowmobile can be accessed from the Arctic Cat
Cat Tracker Dealer Communication System online.
Snowmobile
Identification
The Arctic Cat Snowmobile has two important identifica-
tion numbers. The Vehicle Identification Number (VIN) is
stamped into the tunnel near the right-side footrest or on top
of the tunnel behind the seat. The decal also displays perti-
nent production information. The Engine Serial Number
(ESN) is stamped into the crankcase of the engine.
These numbers are required to complete warranty claims
properly. No warranty will be allowed by Arctic Cat Inc.
if the engine serial number or VIN is removed or muti-
lated in any way.
Recommended Gasoline
and Oil
CAUTION
Do not use white gas or gasolines containing methanol.
Only Arctic Cat approved gasoline additives should be
used.
CAUTION
Any oil used in place of the recommended oil may
cause serious damage.
RECOMMENDED GASOLINE (500/
570/1100 cc Non-Turbo)
The recommended gasoline to use in these snowmobiles
is 87 octane regular unleaded. In many areas, oxygenates
are added to the gasoline. Oxygenated gasolines contain-
ing up to 10% ethanol are acceptable gasolines; however,
on the 570 cc models whenever using oxygenated gaso-
lines, the carburetor main jet must be one size larger than
the main jet required for regular unleaded gasoline. For
example, if a 220 main jet is recommended for regular
unleaded gasoline, a 230 main jet must be installed if
using an oxygenated gasoline.
When using ethanol blended gasoline, adding a gasoline
antifreeze is not necessary since ethanol will prevent the
accumulation of moisture in the fuel system.
 NOTE: On the 500 cc models for optimum perfor-
mance, do not exceed the recommended 87 octane
gasoline. Using a higher octane gasoline will not
increase overall performance.
RECOMMENDED GASOLINE
(800/1100 cc Turbo)
The recommended gasoline to use in these snowmobiles
is 91 octane (minimum).
1-2
 NOTE: If a situation arises wherein 91 octane gaso-
line is not available, 87 octane gasoline can be substi-
tuted; however, do not prolong the usage of 87 octane
gasoline as it will cause poor engine performance.
In many areas, oxygenates are added to the gasoline.
Oxygenated gasolines containing up to 10% ethanol are
acceptable gasolines. Do not use gasolines containing
methanol.
RECOMMENDED OIL (2-Stroke)
The recommended oil to use in the oil-injection system is
Arctic Cat Formula 50 Injection Oil for 500/570 cc models
or either Arctic Cat APV Synthetic 2-Cycle Oil or Formula
SS Semi-Synthetic Oil for 800 cc models. These oils are
specially formulated to be used either as an injection oil or
as a pre-mix oil (for break-in) and meets all of the lubrica-
tion requirements of the Arctic Cat snowmobile engine.
CAUTION
Any oil used in place of the recommended oil could
cause serious engine damage.
RECOMMENDED OIL (4-Stroke)
The recommended oil to use is Synthetic 0W-40 Oil in all
temperatures and conditions.
After the engine break-in period, the engine oil should be
changed every 2500-3000 miles (non-turbo) or 1500-
2000 miles (turbo) and before prolonged storage.

Engine Break-In

2-STROKE
The Arctic Cat 2-stroke engine (when new or rebuilt)
requires a short break-in period before the engine is sub-
jected to heavy load conditions. Arctic Cat requires that
the first tankful of fuel be premixed at a 100:1 ratio in all
oil-injection models.
During the break-in period, a maximum of 1/2 throttle is
recommended; however, brief full-throttle accelerations
and variations in driving speeds contribute to good
engine break-in.
CAUTION
DO NOT exceed the one (1) tankful limitation of a 100:1
gas/oil break-in mixture. Continuous use of a gas/oil
mixture could cause spark plug fouling and excessive
carbon buildup.
OILCHARTJ