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4 - FUEL AND LUBRICATION
4-1. FUEL
Use regular grade unleaded gasoline mixed with Genuine
Factory Parts 40:1 custom 2-cycle engine oil for best
results. Use mixing ratios in Section 4-3.
Never use straight gasoline in your unit. This will
cause permanent engine damage and void the manu-
facturer’s warranty for that product. Never use a fuel mix-
ture that has been stored for over 90 days.
If 2-cycle lubricant other than Genuine Factory Parts
Custom Lubricant is to be used, it must be a premium
grade oil for 2-cycle air cooled engines mixed at a 40:1
ratio. Do not use any 2-cycle oil product with a recommend-
ed mixing ratio of 100:1. If insufficient lubrication is the
cause of engine damage, it voids the manufacturer’s
engine warranty for that occurrence.
4-2. MIXING FUEL
Mix fuel with Genuine Factory Parts brand 2 cycle oil in an
approved container. Use mixing table for correct ratio of
fuel to oil. Shake container to ensure thorough mix.
Lack of lubrication voids engine warranty.
4-3.FUEL AND LUBRICATION SYMBOLS
FUEL MIXING TABLE
4-4.RECOMMENDED FUELS
Some conventional gasolines are being blended with oxy-
genates such as alcohol or an ether compound to meet
clean air standards. Your McCulloch engine is designed to
operate satisfactorily on any gasoline intended for automo-
tive use including oxygenated gasolines.
4-5.CHAIN AND BAR LUBRICATION
Always refill the chain oil tank each time the fuel tank is
refilled. We recommend using Genuine Factory Parts
Chain, Bar and Sprocket Oil, which contains additives to
reduce friction and wear and to assist in the prevention of
pitch formation on the bar and chain.
Gasoline and Oil
Mix 40:1
Oil Only