MJM Yachts 29z Outboard - Manual (Page 18)

CHAPTER 4 STEERING CONTROL SYSTEM
- 18 - 29z
This action over-rides preset automatic trim limits and could drive the top of the
housing up into the bottom of the swim platform, damaging both.
4.4 FOUR TRIM MODES
Automatic Power Trim Assistant (PTA) Ranges – The trim range is adjusted automatically
according to RPM. When a preset RPM level is reached, the drive is angled automatically to the
trim angle specified. In addition to “idle”, 4 trim angles can be selected at different RPM levels to
attain optimum comfort/performance. The PTA must be activated for this procedure. One
example of PTA RPM breakpoint/power trim settings is shown below:
Idle
-3
1500 -1
2000 0
3000 2
3500 3
The PTA is turned ON or OFF in the EVC Display menu under “Settings/sub-menu PTA”. Port
side is the “master” for a single engine.
The function must be turned “Off”
before hauling the boat out of the water to prevent any auto trimming if any test are performed
with the boat on land.
Manual Over-ride. When the PTA is activated and the driver desires a drive angle other than
the presets, use of the Trim Panel buttons momentarily deactivates the PTA until one of the
preset RPM levels is passed. Automatic mode then resumes.
To determine the best trim angle and ranges, familiarize yourself with the characteristics of the
boat, recording the RPMs and trim position at various speeds and in various wave conditions.
Beach Range – Used for running in shallow water
at reduced speed of not
greater than 1500 rpm. Make sure the drive’s raw water intake is never trimmed out of the water.
Lift Range – When the drive is tilted to maximum height, but not when running, for trailing.
Power trim has an automatic stop that cuts power when the preset end limit has been reached.
The stop is reset automatically when activating down trimming.
Never run the
engine when the drive is in “Lift Range”.
Auto Kick Up – Releases the drive if hits bottom or an object in the water.
This feature only protects the drive when going forward. There’s no protection in reverse. If the
function has been tripped and drive released, it must be trimmed back to the original position
using the control buttons.
Check after any contact that the dirve or propeller are not damaged, or if there are vibrations
from the drive. If this is the case, then the boat (if possible) can be run at slow speed to harbor to
haul and inspect. Check the oil level in the drive. If colored gray, water has entered. If this is the
case or other damage exists, contact an authorized Volvo Penta workshop. If only the propeller
is damaged, it must be replaced then the boat run to be sure there is no other damage.
If the parallel strut shows signs of damage, run at reduced speed to harbor as
this is a critical steering element and must be replaced. Never align or weld a damaged strut.
4.5 BOW-THRUSTER & STERN THRUSTER (Optional)
If fitted, thrusters can be used to greatly increase the maneuverability of the boat at slow speeds
in tight quarters around docks and slips.