MerCruiser 13, Руководство по обслуживанию

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4D - 10 - INSTRUMENTATION 90-816462 2-695
Oil Pressure Switch
Refer to Section 4E for switch locations. Switch is nor-
mally closed.
TESTING
1. Remove wire from sender terminal.
2. Connect continuity meter between sender termi-
nal and sender hex. (Sender shown removed for
clarity.)
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3. With engine not running, meter should indicate
full continuity.
4. Start engine. With engine running and engine oil
pressure above 6 PSI (41 kPa), meter should indi-
cate NO continuity.
SWITCH IDENTIFICATION
Switch has 364-AF stamped on hex of sender.
Water Temperature Switch
TESTING
1. Connect an ohmmeter between water tempera-
ture switch terminal (+) and hex (case) for ground
(–) as shown.
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b
a
a - Ohmmeter Leads
b - Water Temperature Switch
2. Switch should read no continuity.
! WARNING
The following test involves the use of intense
heat. Failure to follow appropriate procedures or
warnings can cause burns which can result in se-
vere personal injury. While performing the follow-
ing test, observe these general precautions:
•
Wear personal protective clothing such as
rubber gloves, a non-flammable apron, and
eye protection - preferably full face shield or
safety glasses.
•
The appropriate heat source should only be
electric. Heat source should be operated by a
qualified person. Be sure to follow all instruc-
tions of the manufacturer of the heat source.
The heat source should be checked each time
it is used to be sure it is functioning properly.
•
The thermometer used in the test should be a
high- temperature thermometer with a maxi-
mum reading of at least 300
°
F (150
°
C). Under
no circumstances should the operator allow
temperatures to exceed test specifications.
•
Perform test only in a well ventilated area.
•
Use a suitable container, such as metal, to
hold the sand. Avoid use of glass containers
unless the operator first confirms for himself/
herself that the glass container is an appropri-
ate high-temperature vessel.
•
Because the components will reach high tem-
peratures DO NOT handle materials or com-
ponents until COMPLETELY cooled.
! WARNING
Use only clean, dry sand such as used for general
sandblasting purposes. Use of sand containing
contaminants could result in hazards such as
fire, short circuiting, hot-spots, or other hazards.
3. Follow these instructions:
a. With an ohmmeter connected as outlined and
using suitable container, thermometer and
heat source, suspend sender with tip in sand.