Poulan Pro 177937 Owner's Manual page 51

SUGGESTED GUIDE FOR SIGHTING SLOPES FOR SAFE OPERATION
SIGHTING
GUIDE
SIGHT AND HOLD THIS LEVEL WITH
SKY LINE OR TREE.
Operate your Tractor up and down the face of slopes (not
greater than 15 ), never across the face. Make turns gradu-
ally to prevent tipping or loss of control. Exercise extreme
caution when changing direction on slopes.
ONLY RIDE UP AND DOWN HILL,
NOT ACROSS HILL
15 MAX.