carburetor - SEABEES asbl

74
CHAPTER FOUR
7. Slowly rotate the distributor body
clockwise or counterclockwise as required
until the marks come into alignment. See
Figure 51.
8. Tighten the hold-down bolt without
further moving the distributor. Recheck
timing with the timing light. Repeat Step 6
and Step 7 if timing was disturbed while
tightening the bolt.
9. After the initial timing has been set, check
the operation of the centrifugal advance
mechanism. With the engine operating at
slow idle, note the position of the timing
marks with the timing light.
NOTE
If timing mark moves with jerky
motion or does not start to move within
50-100 rpm of the specified speed in
Step 10, the distributor centrifugal
advance is not working properly and
must be cleaned or repaired.
10. Gradually increase the engine speed to
about 1,800 rpm while observing the timing
marks. The moving mark should move
steadily in a direction opposite of engiine
rotation.
11. Decrease engine speed to slow idle while
observing timing marks. The moving mark
should move back smoothly as speed
decreases.
CARBURETOR
Idle Speed and Mixture Adjustment
Refer to specifications in Table 6 for the
proper idle speed for your engine. Do not
remove the flame arrestor for this procedure.
1. Connect a tachometer according to
manufacturer's instructions.
2. Locate the idle mixture screw(s) on your
carburetor. This is usually a spring-loaded
screw near the carburetor base. See Figure 52
(typical).
3. Locate the idle speed screw on the
carburetor throttle linkage. See Figure 53
(typical).
4. Start the engine and run at fast idle until
normal operating temperature is reached.
5. Once the engine is warmed up, bring it
back to a normal idle. Shift the engine into
FORWARD gear and note the idle speed on
the tachometer. If necessary, adjust the idle
speed screw to bring the idle speed within
specifications (Table 6).
LUBRICATION, MAINTENANCE AND TUNE-UP
75
6. Adjust the idle mixture screw to obtain the
highest rpm possible. If carburetor has 2
mixture screws, adjust them alternately until
the highest rpm reading is obtained.
7. Readjust idle speed to bring it back within
specifications, if necessary.
8. Repeat Step 6 and Step 7 as required until
smoothest engine operation is obtained at the
specified idle speed.
9. Shut engine off and remove tachometer.
Tables are on the following pages.
76
CHAPTER FOUR
Table 1 OMC LUBRICATION AND MAINTENANCE SCHEDULE
ENGINE
Daily
•
•
•
•
•
•
•
•
Check oil level
Check fuel pump overflow line for leakage
Check fuel system for leakage
Check fuel supply
Inspect all electrical connections
Check flame arrestor for damage
Check cooling system for leaks
Check control linkage operation
Every 25 hours
of operation
•
•
•
•
•
Check batter^r
Inspect all electrical connections
Check and clean flame arrestor
Check and adjust alternator drive belt tension
Lubricate control linkage
Every 50 hours
of operation
•
•
•
•
•
•
•
Change engine oil and filter
Check and adjust power steering belt tension
Check ignition system connections and insulation
Clean and check PCV valve ^
Adjust breaker points
Set ignition timing
Check distribututor cap, rotor and wires
Every 100 hours
of operation
• Replace PCV valve ^
Once a season
•
•
•
•
•
•
Replace spark plugs
Adjust power steering drive belt
Replace fuel filter
Check and adjust carburetor idle speed and mixture
Check cooling system and hose condition ^
Check for loose, missing or damaged components
STERN DRIVE
Daily
• Check lower gearcase for smooth shifting in all gears
Every 20 hours
of operation
• Lubricate tilt bearings
Every 25 hours
of operation
• Have nominal neutral adjustment checked by a dealer
• Have steering cable tension adjusted by a dealer
Every 50 hours
of operation
•
•
•
•
•
•
•
Every 6 months
• Lubricate power steering actuator valve and
hydraulic cylinder end, if so equipped
Drain and refill upper gearcase
Drain and refill lower gearcase
Drain and refill intermediate housing
Drain and refill tilt unit gearcase
Lubricate tilt gear
Lubricate swivel bearing
Lubricate steering shaft
(continued)
77
LUBRICATION, MAINTENANCE AND TUNE-UP
Table 1 OMC LUBRICATION AND MAINTENANCE SCHEDULE (continued)
STERN DRIVE (continued)
Drain and refill intermediate housing
Check propeiler for damage
Lubricate SelecTrim jack screw and worm ^
Check SelecTrim hydraulic system for leakage and proper fluid level
Lubricate Pre-Set trim jack screw
Have lower gearcase and shift cable checked by a dealer
Once a season
1. OMC 175, 190 and 235 hp only.
2. Drain after operating in freezing temperatures or during a seasonal lay-up.
3. Do not use a power-operated grease gun.
Anticipated temperature range
Table 2 ENGINE OIL VISCOSITY
Recommended viscosity
Above 32^ F (0° C)
Zero° F (-18° C) to 32° F (0° C)
Below zero° F (-18° C) or
adverse operating conditions
SAE 30*
SAE 20W
SAE 10W
* Use SAE 40 (90 hp) or SAE 30 (all others) for sustained high-speed operation.
Table 3 APPROXIMATE OMC ENGINE OIL CAPACITIES
Capacity*
Engine
With filter
Without filter
Inline 4-cylinder
90 hp
All others
Inline 6-cylinder and 3.8/4.3L V6
225 cid V6 and 5.0L 2-bbl. V8
All others
4.3 qt.
4.0 qt.
4.5 qt.
5.0 qt.
6.0 qt.
3.9 qt.
3.5 qt.
4.0 qt.
4.0 qt.
5.0 qt.
*AII capacities in this table are approximate. To assure correct oil level and prevent overfilling the engine,
always use the dipstick as recommended in the text.
CHAPTER FOUR
78
Table 4 APPROXIMATE STERN DRIVE CAPACITIES
Capacity In fl. o i /
Upper gearcase
Model
Capacity In fl. oz/
Lower gearcase
Capacity In ffl. oz/
Intermediate housing
1964-1968
CU series
1964-1966
1967-1968
DU, NU series
HU, KU, SU, TU series
18.25
18.25
18.25
18.25
17.5
37.2
17.5
37.2
6.95
6.95
6.95
1969-1972
CU, HU, TU, XU series
LU, GU, VU series
NU series
18.25
13.50
18.25
33.9
33.9
17.5
6.95
6.95
6.95
1973-1977
100, 120, 140, 165,
170, 175, 190, 235 hp
225, 245 hp
13.50
18.25
33.9
33.9
6.25
6.25
1978-1979
120, 140 hp
185, 200, 225, 230,
240, 250, 260 hp
13.50
33.8
6.25
13.50
38.4
6.25
1980-1981
120, 140 hp
170, 185, 200, 230,
260 hp
16.60
33.8
6.25
16.60
38.4
6.25
1982-on
2.5L, 3.0L
3.8L, 5.0L, 5.7L
16.60
16.60
26.7
32.1
6.25
6.25
* Capacity is oniy approximate. When refiiling a Stern drive after draining all lubricant, recheck level after a
one-minute run-in period to eliminate air pockets> which may develop during filling. If necessary, top up after
rechecking to bring iubricant to correct level.
Table 5 RECOMMENDED LUBRICANTS, SEALANTS a ADHESIVES
Lubricant
Application
OMC Premium 4-cycle motor oil
OMC HI-VIS gearcase lubricant
Engine crankcase, tilt unit gearcase
Series 400 and 800 upper and lower
gearcase, intermediate housing
Alt Electric Shift upper and lower gearcase.
intermediate housing. Ford hydraulic trim pump
Swivel and tilt bearings, tilt gear
SelecTrim jack screw and worm
OMC Premium Blend gearcase lubricant
OMC Triple-Guard grease
OMC Extreme Pressure grease
(continued)
79
LUBRICATION, MAINTENANCE AND TUNE-UP
Table 5 RECOMMENDED LUBRICANTS, SEALANTS & ADHESIVES (continued)
Lubricant
Application
OMC
OMC
OMC
OMC
Bearings
Engine
Fuel tank
Power steering pump, GM hydraulic trim pump
Needle Bearing grease
Rust Preventative
2 + 4 Fuel Conditioner
Power Tilt and Trim fluid
SEALANTS AND ADHESiVES
OMC Black Neoprene Dip (part No. 909570)
OMC Pipe Sealant with Teflon (part No. 910048)
OMC Gasket Sealing compound (part No. 317201)
Permatex No. 2 (part No. 910032)
RTV adhesive sealant (part No. 909078)
OMC Locquic primer (part No. 384884)
OMC Ultra Lock (part No. 388517)
OMC Nut Lock (part No. 384849)
OMC Spline Lock (part No. 981294)
Scotch-Grip rubber adhesive 1300 (part No. 982551)
OMC Gel Seal/Gasket Remover
Table 6 TUNE -UP SPECIFICATIONS
Engine
cyi./hp or
dispiacement
Sparic plugs
Type
Gap
(in.)
Breaker points
Dwell
Gap
(degrees)
(in.)
Timing
(degrees
BTDC)
Idle
speed
(rpm)
Fuel
pump
(psi)
0.020
0.018-0.019
0.016-0.019
TDC
4
5
600-700
500-600
550-650
9.0
3.5-4.5
4.0-5.75
0.020
0.018-0.019
0.016-0.019
TDC
5
600-700
500-600
550-650
9.0
3.5-4.5
4.0-5.75
0.020
0.016-0.019
0.016-0.019
0.016-0.019
TDC
4
5
2.5
600-700
500-600
550-650
550-650
9.0
3.5-4.5
4.0-5.75
4.0-5.75
0.020
0.016-0.019
0.016-0.019
0.019
0.016-0.019
TDC
4
5
8
2.5
600-700
500-600
550-650
550-650
550-650
9.0
3.5-4.5
4.0-5.75
7-9
4.0-5.75
1964
2/88 hp
4/110 hp
V6/150 hp
AC-M42K
AC-46N
AC-M43S
0.030
0.035
0.035
30
30
1965
2/90 hp
4/120 hp
V6/150 hp
AC-M42K
AC-C44N
AC-M43S
0.030
0.035
0.035
31
30
4
1966
4/90 hp
4/120 hp
V6/150 hp
V8/200 hp
AC-M42K
AC-C44N
AC-M43S
AC-M43S
0.030
0.035
0.035
0.035
31
30
30
1967
4/90 hp
4/120 hp
V6/155 hp
V8/185 hp
V8/200 hp
AC-M42K
AC-C44N
AC-M43S
AC-C43
AC-M43S
0.030
0.035
0.035
0.035
0.035
31
30
29
30
(continued)
CHAPTER FOUR
80
Table 6 TUNE-UP SPECIFICATIONS (continued)
Engine
cyl./hp or
displacement
Spark plugs
Type
Gap
(in.)
Breaker points
Gap
Dwell
(degrees)
(in.)
Timing
(degrees
BTDC)
Idle
speed
(rpm)
Fuel
pump
(psi)
0.025
0.020
0.016-0.019
0.016-0.019
0.020
0.016-0.019
8
TDC
4
5
8
8
580-650
600-700
500-600
550-650
550-650
550-650
1-2
9.0
3.5-4.5
4.0-5.75
7-9
7-9
0.016-0.019
0.016-0.019
0.016-0.019
4
5
10
500-600
550-650
550-650
3.5-4.5
4.0-5.75
7-9
0.025
0.016-0.019
0.016-0.019
0.016-0.019
8
4
5
10
580-650
500-600
550-650
550-650
1-2
3.5-4.5
4.0-5.75
7-9
0.025
0.016-0.019
0.016-0.019
0.016-0.019
0.016-0.019
8
4
5
10
3
580-650
500-600
550-850
550-650
800-650
1-2
3.5-4.5
4.0-5.75
7-9
7-9
0.016-0.019
0.016-0.019
0.016-0.019
0.016-0.019
0.016-0.019
0.016-0.019
4
4
5
8
10
10
500-600
500-600
550-650
500-600
550-650
600-650
3.5-4.5
3.5-4.5
4.0-5.75
3.5-4.5
0.016-0.019
0.018-0.019
0.016-0.019
0.016-0.019
0.018-0.019
0.016-0.019
4
500-600
500-600
500-600
500-600
550-650
600-650
3.5-4.5
3.5-4.5
4.0-5.75
3.5-4.5
7-9
7-9
1968
4/80 hp
4/90 hp
4/120 hp
V6/155 hp
V8/185 hp
V8/200 hp
AC-R43N
AC-M42K
AC-C44N
AC-M43S
AC-C43
AC-C43
0.025
0.030
0.035
0.035
0.035
0.035
39
—
31
30
29
30
1969
4/120 hp
V6/155 hp
V8/210 hp
AC-C44N
AC-M43S
AC-C43S
0.035
0.035
0.035
31
30
30
1970
4/90 hp
4/120 hp
V6/155 hp
V8/210 hp
AC-R43N
AC-C44N
AC-M43S
AC-CR43K
0.025
0.035
0.035
0.035
39
31
30
30
1971
4/90 hp
4/120 hp
V6/155 hp
V8/215 hp
V8/235 hp
AC-R43N
AC-C44N
AC-M43S
AC-CR43K
AC-CR43K
0.025
0.035
0.035
0.035
0.035
39
31
30
30
30
1972
4/100 hp
4/120 hp
V6/155 hp
6/165 hp
V8/225 hp
V8/245 hp
AC-C44N
AC-C44N
AC-M43S
AC-MR43T
AC-MR43T
AC-MR43T
0.035
0.035
0.035
0.035
0.035
0.035
31
31
30
31
30
30
7-9
7-9
1973
4/100 hp
4/120 hp
4/140 hp
6/165 hp
V8/225 hp
V8/245 hp
AC-C44N
AC-C44N
AC-C44N
AC-MR43T
AC-MR43T
AC-MR43T
0.035
0.035
0.035
0.035
0.035
0.035
31
31
31
31
30
30
(continued)
4
4
6
10
10
LUBRICATION, MAINTENANCE AND TUNE-UP
81
Table 6 TUNE-UP SPECiFICATICNS (continued)
Engine
cyl./hp or
displacement
Spark plugs
Type
Gap
(in.)
Breaker points
Dwell
Gap
(degrees)
(in.)
Timing
(degrees
BTDC)
Idle
speed
(rpm)
Fuel
pump
(psi)
0.016-0.019
0.016-0.019
0.016-0.019
0.016-0.019
0.016-0.019
0.016-0.019
0.016-0.019
4
4
6
6
10
10
10
500-600
500-600
500-600
500-600
500-600
550-650
600-650
3.5-4.5
3.5-4.5
5-6
3.5-4.5
5-6
7-9
7-9
0.016-0.019
0.016-0.019
0.016-0.019
0.016-0.019
0.016-0.019
0.016-0.019
0.016-0.019
0.016-0.019
4
4
6
10
10
10
10
10
500-600
500-600
500-600
500-600
500-600
550-650
500-600
600-650
3.5-4.5
3.5-4.5
3.5-4.5
5-6
5-6
7-9
5-6
7-9
0.016-0.019
0.016-0.019
0.016-0.019
0.017
0.017
0.016-0.019
0.017
4
4
6
10
10
10
10
500-600
500-600
500-600
500-600
500-600
550-650
500-600
4.0-5.75
4.0-5.7
3.5-4.5
7-9
7-9
7-9
7-9
0.016-0.019
0.016-0.019
0.017
0.017
0.017
4
4
101
102
103
500-600
500-600
500-600
500-600
500-600
4.0-5.75
4.0-5.75
7-9
7-9
7-9
0.016-0.019
0.016-0.019
0.018
0.018
0.018
4
4
7
7
6
500-600
500-600
550-650
550-650
500-600
4.0-5.75
4.0-5.75
7-9
7-9
7-9
1974
4/120 hp
4/140 hp
6/165 hp
V8/170 hp
V8/190 hp
V8/225 hp
V8/245 hp
AC-C44N
AC-C44N
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
0.035
0.035
0.035
0.030
0.030
0.035
0.035
31
31
31
31
31
30
30
1975
4/120 hp
4/140 hp
6/165 hp
V8/175 hp
V8/190 hp
V8/225 hp
V8/235 hp
V8/245 hp
AC-C44N
AC-C44N
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
0.035
0.035
0.035
0.030
0.030
0.035
0.030
0.035
31
31
31
31
31
30
31
30
1976
4/120 hp
4/140 hp
56/165 hp
V8/175 hp
V8/190 hp
V8/225 hp
V8/235 hp
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
0.035
0.035
0.035
0.030
0.030
0.035
0.030
31
31
31
29
29
30
29
1977
4/120 hp
4/140 hp
V8/175 hp
V8/190 hp
V8/235 hp
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
0.035
0.035
0.030
0.030
0.030
31
31
29
29
29
1976
4/120 hp
4/140 hp
V8/185 hp
V8/225 hp
V8/240 hp
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
0.035
0.035
0.035
0.035
0.035
31
31
30
30
31
(continued)
CHAPTER FOUR
82
Table 6 'rUNE-UP SPECIFICATIONS (continued)
Engine
cyl./hp or
displacement
Spark plugs
Type
Gap
(in.)
Breaker points
Gap
Dwell
(degrees)
(in-)
Timing
(degrees
BTDC)
Idle
speed
(rpm)
Fuel
pump
(psi)
0.016-0.019
0.016-0.019
0.018
0.018
0.018
0.017
0.018
4
4
7«
6
10
500-600
500-600
550-650
550-650
550-650
500-600
550-650
4.0-5.75
4.0-5.75
7-9
7-9
7-9
7-9
7-9
0.016-0.019
0.016-0.019
0.018
0.018
0.018
0.018
4
4
13
13
13
10
500-600
500-600
500-600
500-600
500-600
500-600
3.5-6.0
3.5-6.0
5.75-7.0
5.75-7.0
5.75-7.0
5.75-7.0
0.016-0.019
0.016-0.019
0.016-0.019
0.018
0.018
4
4
10
13
10
500-600
500-600
500-600
500-600
500-600
3.5-6.0
3.5-6.0
5.75-7.0
5.75-7.0
5.75-7.0
0.019
0.019
0.018
0.018
0.018
1 ATDC
1 ATDC
1
8
5
500-600
500-600
500-600
500-600
500-600
3.5-6.0
3.5-6.0
5.75-7.0
5.75-7.0
5.75-7.0
1979
4/120 hp
4/140 hp
V8/185 hp
V6/200 hp
V8/230 hp
V8/250 hp
V8/260 hp
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
0.035
0.035
0.035
0.035
0.035
0.030
0.035
31
31
30
30
30
29
30
74
74
1980
4/120 hp
4/140 hp
V8/185 hp
V8/200 hp
V8/230 hp
V8/260 hp
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
0.035
0.035
0.035
0.035
0.035
0.035
31-34
31-34
30
30
30
30
1981-1985
4/2.5L
4/3.0L
V6/3.8L
V8/5.0L
V8/5.7L
AC-MR43T
AC-MR43T
AC-MR44T
AC-MR44T
AC-MR43T
0.035
0.035
0.035
0.030
0.030
31-34
31-34
395
30
30
1986
4/2.5L
4/3.0L
V6/4.3L
V8/5.0L
V8/5.7L
1.
2.
3.
4.
5.
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
AC-MR43T
0.035
0.035
0.035
0.030-0 035
0.030-0 035
31-34
31-34
39
30
30
Models 990240G and 990241G—6' BTDC.
Modeis 990231G and 990232G—6' BTDC.
Models 990240G and 990241G—6° BTDC.
Lightwe ight heads—13° BTDC.
1984-1985—36°.