 |
  |
 |
 |
 |
 |
 |
 |
 |
 |
 |  |
|
Would you like to see FAQ's for: |
||
|
Q.
Does it make any difference where the outdrive is
vertically positioned on my stern drive? A.
Generally it is best to mount the outdrive on the transom so that the
cavitation plate is located approximately 1" below the bottom
of the keel or gull if there is no keel.
Stern drives on houseboats are generally located deeper in
the water and may have strut extensions.
High performance ocean racers will position the
cavivitation plate even with or above the hull bottom for best
performance. Q.
Will a propeller change help my I/O installation? A.
Generally the boat manufacturer exhaustively tests the various models to
insure that the boat performs properly.
If, however, the owner increases the boat displacement by
installing heavy optional equipment, a different propeller will be
required. In almost
all cases, the propeller to be used would be comparable in
diameter but have less pitch. A.
Differences in hull design, such as hull dead rise, position of center
of gravity and transom angles can account for significantly
different performance. Transom
angle is important since it governs the maximum tilt setting of
the stern drive and consequently the shaft angle. A.
The bow-down attitude results form the longitudinal position of the
center of gravity being forward of midships.
Merely changing shaft angle will not correct the severe
plowing which would be experienced.
As the lower unit is tilted toward the furthest lockbar
position, effectively changing the shaft angle, the depth
propeller is immersed is decreased and ventilation will occur
causing a breakdown of thrust.
This phenomenon is sometimes mistakenly termed cavitation Q.
Will a 4-blade propeller increase the performance of my
houseboat? |
||
Outboard
|
|
