65
Maintenance Instructions
REPLACING/REPAIRING
Fuel Filter
Model MBSY has
two (2) fuel filters.
Replace both
the in-line filter and the Yanmar filter element
every
400 hours
of operation.
Fuel
Filter
Fuel Filter/
Water Separator
Fuel Filter Location
IMPORTANT:
Replace the fuel filters only in a clean
area where the fuel line and connections will not be
contaminated by dust and dirt.
1. Close the Yanmar fuel filter cock.
2. Remove and replace the in-line filter; expand and
slide clamps on either side of the filter away from
filter and pull fuel lines off filter.
3. Loosen the ring screw on the Yanmar filter
assembly, remove the filter pot and filter element.
4. Clean the filter pot and reassemble the filter
assembly with a new filter element (use only a
Yanmar replacement filter).
5. Open the fuel filter cock.
Mower Blades
Mower blades are removed and remounted as de-
scribed in the
Sharpen Mower Blades
instructions
(refer to
CHECKING/SERVICING
to
Sharpen Mow-
er Blades
in this section). During the course of
sharpening and inspecting mower blades, if there are
any of the following conditions of wear
or dam-
age,
blades should be replaced
for reasons of safe-
ty and performance of the machine:
•
An excessive amount of the
flat section
of the
blade has been
ground away
(removed) when the
blade is sharpened. Replace the blade
when less
than a 3/4 in. (19 mm) flat section remains
at the
blade tip.
•
Examine ends of the blade carefully, especially the
intersection where the flat section of the blade turns
up to form the “wing tip” (refer to
Mower Blade Pro-
file for Sharpening
illustration in
Sharpen Mower
Blades
instructions). Since sand and abrasive ma-
terial can wear metal away in this area, the blade
should be
replaced when metal thickness has
worn to 1/16 in. (1.6 mm) or less.
DANGER
When blades are operated over sandy
soil, and if blades are allowed to wear, a
“slot” may be worn into the wing tip of
blade. Eventually a piece of the blade
may break off creating a serious potential
for injury or damage.
•
Check the blades for
straightness
by marking
blade tip position inside the deck housing and then
ro tating the opposite end of the blade to the same
po sition and comparing. If the difference in blade tip
track is
more than 1/8 in. (3 mm),
the blade is bent
and
should be replaced.
•
Inspect the blade surface, especially in formed
areas, for
cracks.
Replace the blade if any cracks
are found.
