Cobalt Digital Inc 1999 190 Owner's Manual page 68

P
ROPELLERS
INCORRECT PROPELLER APPLICATION CAN CAUSE ADVERSE HANDLING
CHARACTERISTICS. DO NOT CHANGE TYPE OR SIZE OF PROPELLER WITHOUT
CONSULTING YOUR COBALT DEALER!
S
TAINLESS
P
ULLING
Model Mfgr
252 Merc
252 Merc
252 Merc
252 Merc
252 Merc
252 Merc
252 Merc
252 Merc
252 Merc
252 Merc
252 Merc
252 Merc
252 Merc
252 Merc
252 Merc
252 Volvo
252 Volvo
252 Volvo
252 Volvo
252 Volvo
252 Volvo
252 Volvo
252 Volvo
C B - O ' M
OBALT OATS WNER S ANUAL
- G
ENERAL
Nothing is more important to the proper performance of your boat than the condition of
the propeller(s). Even minor damage (often invisible to the naked eye) can adversely
affect the boat's performance. Common symptoms of damage to propellers are a sudden
drop in RPM, vibration or sudden loss of speed.
A propeller is measured by two dimensions: 1) the diameter; and, 2) the pitch. The
diameter is determined by measuring the distance from the center of the propeller to the
tip of one blade and multiplying that figure by two. Pitch is expressed in the number of
inches a prop will advance in a solid medium in one revolution.
Operational characteristics of your boat, including its speed, may change due to several
factors: atmospheric conditions; additions of extra equipment and accessories or
passengers; marine growth on the bottom; and, engine condition. Other factors include
damage to the prop(s), tides, water temperature and direction of wind. Some of these
factors are directly correctable by repair or maintenance. Others are beyond human
control.
S
TEEL
Some Cobalts are standard equipped with stainless propellers. In this instance, do not
substitute aluminum propellers. Adverse handling and top speed characteristics may be
experienced.
P
OWER
If you need extra pulling power, you can obtain this by decreasing the pitch of your
propeller(s) by two degrees. This will not endanger the engine or drive unit as long as
the manufacturer's recommended top RPM's are not exceeded.
Engine Drive Fuel system
5.7L ALpha
5.7L Bravo 1
5.7L Bravo 3
5.7L EFI ALpha Throttle-Body
5.7L EFI Bravo 1 Throttle-Body
5.7L EFI Bravo 3 Throttle-Body
350 Mag MPI ALpha Multi-Port
350 Mag MPI Bravo 1 Multi-Port
350 Mag MPI Bravo 3 Multi-Port
7.4L MPI Bravo 1 Multi-Port
7.4L MPI Bravo 3 Multi-Port
454 Mag MPI Bravo 1 Multi-Port
454 Mag MPI Bravo 3 Multi-Port
502 Mag MPI Bravo 1 Multi-Port
502 Mag MPI Bravo 3 Multi-Port
5.7GS SX
5.7GS DP
5.7GSi SX Throttle-Body
5.7GSi DP Throttle-Body
7.4Gi SX Multi-Port
7.4Gi DP Multi-Port
7.4GSi DP Multi-Port
8.2GSi DP Multi-Port
std. ratio Option
2 BBL 1.47 1.62
2 BBL 1.65 NA
2 BBL 2.20 2.43
1.47 1.62
1.65 NA
2.20 2.43
1.47 1.62
1.50 1.65
2.20 2.43
1.50 1.65
2.00 2.20
1.50 1.65
1.81 2.20
1.50 1.65
1.81 2.20
2 BBL 1.51 1.60
2 BBL 1.95 2.32
1.43 1.60
1.95 NA
1.43 1.60
1.78 1.95
1.78 1.95
252.4
252
M S I
ODEL PECIFIC NFORMATION
php Prop Dscpt Mfg. part #
250
250
250
260
260
260 24's 48-823665A6/66A6
300
300
300
310 15 1/4 x 19 RH 48-13700A45
310 26's 48-823667A6/68A6
385
385 26's 48-823667A6/68A6
415 14 5/8 x 23 RH 48-13704A45
415 28's 48-823669A6/70A6
250
250
280
280 F6 3851496-4
315
315 F5 3851495-6
385 F6 3851496-4
415