Craftsman 247.287751 - Manual (Page 14)

Yearly or every 25 hours, whichever occurs first,
remove the blower housing and clean the areas shown
in figure 21 to avoid overspeeding, overheating and
engine damage. Clean more often if necessary.
A
WARNING: PERIODICALLY CLEAN MUF­
FLER AREA TO REMOVE ALL GRASS,
DIRT AND COMBUSTIBLE DEBRIS.
Clean Out
> Chaff and Dirt
FIGURE 21.
SPARK PLUG
The spark plug should be cleaned and the gap reset
to .030" at least once a season or every 50 hours of
operation. See figure 22. Spark plug replacement is
recommended at the start of each season. Refer to
engine parts list for correct spark plug type.
NOTE: Do not blast clean spark plug. Spark plug
should be cleaned by scraping or wire brushing and
washing with a commercial solvent.
MUFFLER
Do not operate the log splitter without a muffler or
tamper with the exhaust system. Damaged mufflers or
spark arresters could create a fire hazard. Inspect
periodically, and replace if necessary. If your engine
is equipped with a spark arrester screen assembly,
remove every 50 hours for cleaning and inspection.
Replace if damaged.
FLEXIBLE PUMP COUPLER
The flexible pump coupler is a nylon “spider” insert,
located between the pump and engine shaft. The align­
ment is very critical. Over a period of time, the coupler
will harden and deteriorate. For a replacement flexible
pump coupler, order part number 717-0891.
A WARNING: NEVER HIT THE PUMP
SHAFT IN ANY MANNER, AS ANY BLOW
WILL CAUSE PERMANENT DAMAGE TO
THE PUMP.
When replacing the flexible pump coupling, proceed
as follows.
• Place the coupling half onto the engine shaft. Make
certain there is clearance between the coupling half
and the engine. Tighten the set screw.
• Mount the pump onto the coupling support bracket.
Tighten securely.
• Carefully slide coupling half onto pump shaft (make
certain set screw is loose). Slide the key into place
on the shaft.
• Install the nylon “spider” insert into coupling half on
the engine shaft.
• Place the coupling shield in position on the hex bolts.
Rotate the keyway on the pump shaft so it is toward
the bottom.
• Attach the coupling support bracket to the hex bolts,
carefully sliding the coupling half over the “spider”
insert. Secure coupling shield and coupling support
bracket with lock washers and hex nuts. Tighten
securely.
• Adjust the two coupling halves (steel) so there is be­
tween . 010 " and .060" clearance between the two
halves (at least the thickness of a matchbook cover,
up to 1/16" maximum). See figure 23. Tighten the
set screw in the coupling half on the pump shaft.
NOTE: Make certain proper clearance is obtained
before tightening set screw.
PUMP
TIRE PRESSURE
Check sidewall of tire for manufacturer’s recommended
maximum tire pressure. If this information does not ap­
pear on your tire, maximum tire pressure under any cir­
cumstances is 30 p.s.i. Equal pressure should be
maintained on both tires.
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