Homelite CSP3816 - UT74123A Operator's Manual page 8

No Smoking
Petrol
Oil
Mix Petrol and Oil
SAVE THESE INSTRUCTIONS
SYMBOLS
Do not smoke when mixing fuel or filling fuel tank.
Use unleaded petrol intended for motor vehicle use
with an octane rating of 87 [R + M] / 2) or higher.
Use 2-cycle oil for air-cooled engines.
Mix the fuel mix thoroughly and also each time
before refuelling.
UK - Page 8