850 Engine; Engine Model Number Matrix - 2020; Engine Model Number Matrix - 2021; Engine Specifications - Polaris 850 PRO-RMK 155 2020 Manual

850 ENGINE

GENERAL INFORMATION

ENGINE MODEL NUMBER MATRIX - 2020

MODEL YEAR
2020

ENGINE MODEL NUMBER MATRIX - 2021

MODEL YEAR
850 PRO-RMK / RMK Khaos (155/163/165)
850 PRO-RMK / RMK Khaos (155/163/174) 3.0
2021

ENGINE SPECIFICATIONS

ENGINE MODEL
NUMBER
ALL ENGINES
9850060 R02 - 2020-2021 850 AXYS™ Long Track Snowmobile Service Manual
© Copyright Polaris Inc.
VEHICLE
850 PRO-RMK 155 / 163
850 RMK Khaos 155
850 PRO-RMK 155 / 163 / 174 3"
850 RMK Khaos 155 3"
850 SKS 155
VEHICLE
Track
850 SKS 155
HEAD SQUISH
RANGE
MM (INCHES)
1.290 (0.051")
MINIMUM
NOMINAL
1.630 (0.064")
MAXIMUM
ENGINE / COOLING / EXHAUST
ENGINE MODEL NUMBER
S6031-8444-LP8R
ENGINE MODEL NUMBER
S6185-8444-LO8R
PISTON-TO-
PISTON RING
CYLINDER
END GAP
CLEARANCE
MM (INCHES)
MM (INCHES)
0.145 (0.0057") 0.40 (0.016")
0.155 (0.0061") 0.50 (0.020")
3
TRIGGER-TO-
FLYWHEEL
GAP
MM (INCHES)
0.36 (0.014")
0.9 (0.035")
1.34 (0.052")
3.47