Piston Identification; Engine Fastener Torque Patterns; Cooling System - Polaris A09BG50AA User Manual

SPECIAL TOOLS
PART NUMBER
2872105
2200634
2870390
2871043
2871283
5131135
ENGINE FASTENER TORQUE
PATTERNS
Tighten cylinder head, cylinder base, and crankcase
fasteners in 3 steps following the sequence outlined
below.
3 2
1 4
Cylinder Head
Cylinder Base
Pattern
7
5
3
1
2
4
Crankcase
Pattern
TOOL
DESCRIPTION
Water Pump
Mechanical Seal
Puller
Valve Seat
Reconditioning Kit
Piston Support
Block
Flywheel Puller
Crankshaft/Water
Pump Seal Install
Kit
Water Pump
Install Kit
6mm
5
6
9
10
8
6

PISTON IDENTIFICATION

The piston may have an identification mark or the
piston may not have an identification mark for
piston placement. If the piston has an identification
mark, follow the directions for piston placement
below. If the piston does not have an identification
mark, the direction for placement of the piston does
not matter.
Note the directional and identification marks when
viewing the pistons from the top. The letter "F", " !
", " "" or : must always be toward the flywheel side
of the engine. The other numbers are used for
identification as to diameter, length and design. Four
stroke engine rings are rectangular profile. See text
for oil control ring upper rail installation. Use the
information below to identify pistons and rings.
Engine
Oversize
Model No.
Available*
(mm)
EH50PLE10 .25
.50
*Pistons and rings marked 25 equal .25mm (.010I)
oversized
Pistons and rings marked 50 equal .50mm (.020I)
oversized

COOLING SYSTEM

WARNING: Never remove radiator cap when engine
is warm or hot. The cooling system is under pressure
and serious burns may result. Allow the engine and
cooling system to cool before servicing.
FLOW
Radiator
Thermostat
Cylinder
Head
ENGINE
Piston Standard
Length Piston
Identifier
72mm C
Water
Pump
Cylinder
3.5