Cruiselog Meter
Vacuum Gauge
TESTING
TESTING
1.
Connect jumper wire from negative (–) battery
terminal to negative (–) gauge terminal.
1. Disconnect vacuum hose from engine. Connect
service vacuum gauge to engine and record en-
gine vacuum readings at idle, 1000, 2000 and
2.
Connect jumper wire from positive (+) battery ter-
minal to positive (+) gauge terminal.
3000
RPM. Reconnect vacuum hose and com-
pare vacuum gauge readings (at specified RPM)
with service gauge readings. Readings shouldbe
within 3 inches of vacuum of each other.
IMPORTANT: Make sure that vacuum hose be-
tween gauge and engine is not leaking and that
all connections are tight.
Speedometer
TESTING
IMPORTANT: When testing speedometer gauge
for accuracy, the air supply used for the test must
be regulated to the specified air pressure. Do not
apply excessive air pressure to speedometer
gauge.
72752
3.
Observe gauge run indicator. If indicator is turn-
ing, gauge is operable; if not, replace gauge.
1.
Apply air pressure directly to speedometer gauge
(specified in chart) and note gauge reading. Light
tapping of pressure gauge is required during ac-
curacy check.
2.
If gauge readings are not within specifications,
gauge is defective
CALIBRATION CHART
Air Pressure Guage
PSI
Speedometer Gauge
MPH (km/Hr)
5.3
20±2 (32±1.6)
45±1 (72±1.6)
27.8
a
Tachometer
72753
TESTING
1.
Connect a service tachometer to engine and
compare readings.
a - Indicator
2.
Replace if not within specifications.
Tachometer
RPM
Allowance
6000
± 150 RPM
± 200 RPM
8000
RPM
Index
4D-4 - INSTRUMENTATION
90-823224--2 796
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
Could not find a copy until a search brought me here.
Excellent print.
Thank you