Periodic maintenance
48
To install an upper cover
1.
Insert the projections on the upper cover
into the slots, fit the holders on the cover
onto the grommets, and then tighten the
fasteners.
2.
Close the shroud.
WARNING
EWS00090
●
Do not drive the snowmobile with the
shroud or covers unfastened or re-
moved.
●
Keep your body and clothing away from
rotating parts when servicing the snow-
mobile with the shroud or covers re-
moved.
●
Do not touch the hot muffler and engine
during or immediately after operation.
CAUTION:
ECS00370
Make sure that all cables, leads, etc., are
routed properly before installing the
shroud and covers.
NOTE:
When installing the covers, be sure to tighten
all fasteners securely.
ESU11780
Checking the spark plugs
The spark plug is an important engine compo-
nent and is easy to inspect. The condition of
the spark plug can indicate the condition of
the engine.
Check the coloration on the white porcelain
insulator around the center electrode. The
ideal coloration at this point is a medium to a
light tan color for a snowmobile that is being
ridden normally. If a spark plug shows a dis-
tinctly different color, there could be some-
thing wrong with the engine. For example, a
very white center electrode porcelain color
could indicate an intake track air leak or car-
buretion problem for that cylinder. Do not at-
tempt to diagnose such problems yourself.
Instead, take the snowmobile to a Yamaha
dealer for inspection and possible repairs.
1. Projection
2. Holder
1. Grommet
1. Slot
U8GK11E0.book Page 48 Wednesday, April 11, 2007 9:51 AM
Summary of Contents for PZ50RTX
Page 1: ...OWNER S MANUAL PZ50RTX PZ50GTX PZ50MTX PZ50VTX 8GK 28199 11 LIT 12628 02 68 ...
Page 2: ...ESU10040 ...
Page 11: ...Safety information 5 ...
Page 12: ...Safety information 6 ...
Page 88: ...Consumer information 82 ESU12510 YAMAHA EXTENDED SERVICE Y E S ...
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Page 92: ...YAMAHA MOTOR CO LTD PRINTED ON RECYCLED PAPER PRINTED IN JAPAN 2007 04 1 5 1 CR ...