Break-In Procedures; Engine Break-In Procedure; Fuel/Oil Premix Ratio; Drive Belt Break-In Procedure - Polaris 340 LX 2007 Service Manual

BREAK-IN PROCEDURES

Engine Break-In Procedure

The first tank of fuel is considered the break-in period for
the engine. During this time it is critical to not operate the
engine at full throttle for more than a few seconds. Vary the
throttle speed as much as possible. Monitor engine
temperatures and fluid levels often during the break-in
period.
NOTE: During the engine break-in period, verify the
oil injection system is functioning by monitoring the
oil level in the oil tank. If the oil level does not drop,
inspection the oil injection system.
Polaris recommends filling the oil tank and pre-mixing the
first full tank of fuel with Premium 2-Cycle Semi-Synthetic
Oil when the engine is either new or refurbished (new
pistons, crankshaft, cylinder, etc.). Polaris semi-synthetic
engine oil will seat the rings faster than when using Polaris
VES Gold Plus oil.
After the break-in period use Polaris VES Gold Plus
engine oil for normal operation for snowmobiles equipped
with VES engines.

Fuel/Oil Premix Ratio

During the break-in period, premix the first tank a fuel (10
US gallons) using a 40:1 (fuel to oil) ratio.
Formula = 1 US Gallon = 128oz. / 40 (Desired Ratio) =
3.2oz. for every 1 US gallon of fuel.
10 US gallons of fuel requires 32oz. of oil to achieve a 40:1
premix ratio.
Always mix fuel and oil 5 gallons at a time. Never fill the
tank with fuel and then add oil.

Drive Belt Break-In Procedure

The break-in period for a new drive belt is 30 miles. During
this time, vary the throttle position under 50% and limit full
throttle use.
New drive belts that feature a sanded finish should be first
washed with warm, soapy water and allowed to air dry
prior to use.
Always take time to warm up the belt and driveline prior to
operating the snowmobile. Free track and skis from the
ground before engaging throttle.

DRIVE / DRIVEN CLUTCHES

Belt Deflection Inspection

Too much belt deflection is when the belt is too long or the
center distance is too short. The initial starting ratio will be
too high, resulting in performance loss. This is due to the
belt rising too high in the drive clutch sheaves upon
engagement (A).
Not enough belt deflection (B) is when the belt is too short
or the center distance is too long. The initial starting ratio
will be too low. In addition, the machine may creep when
the engine idles, causing damage to the internal face of
the drive belt.
1. Measure the belt deflection with both clutches at rest
2. Place a straight edge across the two clutches, on top
3. Apply downward pressure to the belt and measure the
9923396 - 2007-2012 EDGE/Widetrak LX Service Manual
©2011 Polaris Sales Inc.
and in their full neutral position.
of the belt.
distance at point (D).
Maintenance
3
3.5