10
5 - FUEL AND LUBRICATION
5-1. 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 5-3.
Never use straight gasoline in your unit. This will
cause permanent engine damage and void the man-
ufacturer’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 premi-
um grade oil for 2-cycle air cooled engines mixed at a 40:1
ratio. Do not use any 2-cycle oil product with a recom-
mended mixing ratio of 100:1. If insufficient lubrication is
the cause of engine damage, it voids the manufacturer’s
engine warranty.
5-2. MIXING FUEL
Add oil to an approved fuel container followed by the gaso-
line to allow incoming gasoline to mix with oil. Shake con-
tainer to ensure thorough mix.
Lack of lubrication voids engine warranty. Gasoline and
oil must be mixed at 40:1.
5-3. FUEL MIXING TABLE
5-4. 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.
5-5. FUEL AND LUBRICATION SYMBOLS
Gasoline and Oil
Mix 40:1
4-8. INSTALLING THE ATTACHMENT
(MT30775/MT30790)
WARNING
To avoid serious personal injury, shut unit off before remov-
ing or installing attachment.
NOTE:
To make installing or removing the attachment eas-
ier, place the unit on the ground or on a work bench.
1. Turn the knob counterclockwise to loosen (Fig. 4-8A).
2. While firmly holding the attachment, push it straight into
the coupler until the release button appears in the pri-
mary hole of the coupler. (Fig. 4-8B)
3. Turn the knob clockwise to tighten. (Fig. 4-8C)
CAUTION
The release button must be in the primary hole and the
knob securely tightened before operating this unit.
All attachments are designed to be used in the primary
hole unless otherwise indicated in the specific attachments
operators manual. If the incorrect hole is used, it could
result in injury, or damage to the unit.
NOTE:
Turn attachment rotating parts by hand to and fro to
have the attachment shaft connect to the powerhead drive
shaft slot more easily.
9
4 - ASSEMBLY INSTRUCTIONS
4-8A
4-8B
4-8C
Coupler
Release
Button
Guide Recess
Knob
Primary Hole
Release Button
Attachment
Knob
Upper Shaft Housing
Summary of Contents for MT3075
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