US-14
BCZ3050S/T/SW
every every every
25 50 100
system/compornent procedure before hours hours hours note
use after after after
fuel leaks, fuel spillage wipe out ✔
fuel tank, air filter, fuel filter inspect/clean ✔✔ replace, if necessary
see ■ADJUSTING replace carburetor
idle adjusting screw ✔
IDLING SPEED (p.12) if necessary
clean and readjust GAP: .038in (1.0mm)
spark plug ✔
plug gap replace, if necessary
cylinder fins, intake air cooling vent clean ✔
muffler, spark arrester, cylinder exhaust port
clean ✔
throttle trigger, stop switch check operation ✔
replace if
cutting parts ✔
something's wrong
cutting attachment guard make sure to attach ✔
angle transmission grease ✔
screws/nuts/bolts tighten/replace ✔✔not adjusting screws
ENGINE
SHAFT
■ MAINTENANCE CHART
Maintenance, replacement, or repair of the emission control device and systems may be performed by any
non-road engine repair establishment or individual.
9. Maintenance
MA1-b
MA1-a
Make sure that the engine has stopped
and is cool before performing any
service to the unit. Contact with any
moving parts, the cutting head or a hot
muffler may result in personal injury.
■ REFILLING TRIMMING LINE
For safety reasons, do not use
metalreinforced line.
[BCZ3050S] [BCZ3050SW] (MA1-a)
1. For replacement line, use a diameter of
.095in (2.4mm). The spool is capable
for a line up to 20feet (6m) on the 4”
head. Avoid using a larger line as it
may cut down the trimming
performance.
2. Pinch the slotted area on the both sides
of the spool housing to unhook the
bottom cap.
3. Take out the spool and pull off the old
line. Fold new line so that one half line
is 4.7in.(12cm) shorter than another
half. And then, hook bended end in the
slot of the spool.
4. Wind up the line in the correct direction
as indicated on the spool.
5. Hook each end of the line in the slot on
the edge of the spool, and then put the
ends through the eyelets on the
housing. Make sure that the spring and
the washers are in place.
6. While holding the spool against the
housing, pull the line ends to release
them from the slot.
7. Line up the slot on the bottom cap with
the hook on the housing, press the cap
against the housing until it clicks.
[BCZ3050T] (MA1-b) (MA1-c) (MA1-d)
The spool is designed to hold 20 feet of
.095 or 18 feet of .105 inch monofilament
line. RedMax recommends Cable Twist™
line for best performance for commercial
use. RedMax Cable Twist™ line is
available from your local RedMax Dealer.
Taking the Head Apart (MA1-b)
1. Press in one side locking tab that
secures the cover to the main body and
push the lid cover upwards to separate
from the body. Repeat the process on
the other side and remove the cover.
2. Remove the spool from the housing
and remove the old line.
(120 pages)
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