Tilt Limit Switch Adjustment
If the outboard does not clear all boat parts when tilted fully or turned side to side , safety related p arts could be damage d in the course of such outboard movement. Injuries could result from loss of boat control.
Adjust the tilt limit switch o n all new outboard installations.
Check the clearance between outboard(s) and the boat’s motor well and transom area. Tilt out board(s) to highest point of clearance and turn the steering system lock to lock.
If the outboard contacts the boat's motor well when fully tilted, adjust the tilt limit cam t o reduce full-tilt position.
The tilt limit ca m will no t prevent the outboard from overriding the adjustment if the outboard is tilted manually
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Place the outboard in normal operating position. Rotate the LOWER adjustment tab UP to reduce the maximum tilt. Rot ate the UPPER adjustment tab DOWN to increase the maximum tilt position.
- Lower adjustment tab
- Upper adjustment tab
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Check the adjustment by tilting the outboard fully. Repeat this procedure until the tilt limit switch stops the outboard's upward travel before it contacts the motor well.
To pre vent da mage to equipment, provide additional motor well clearance when needed. Co n sider either changing the outboard mounting position or modifying the boat if the possibility for interference and damage exists.
Adjusting the tilt limit cam will NOT prevent the outboard from tilting fully and contacting the motor well if the gearcase hits an object at high speed. Such contact could damage the outboard and b oat and injure boat occupants.
Tilt the outboard and engage the tilt support. Temporarily install a thrust rod, P/N 436541, in the number 3 hole.
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Loosen the sending unit screws, to allow the sending unit to pivot.
- Screws 27339
Disengage the tilt support. Lower the outboard against the thrust rod.
Observe the trim gauge. If the needle does not show center position, tilt the outboard up an d adjust the sending unit by pivoting it up or down.
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- Needle at center position 000662
Lower the outboard against the thrust rod to check adjustment. Repeat adjustment, if necessary.
After adjustment is correct, tilt the outboard u p, tighten the two sending unit screws, and remove the thrust rod.
Trim Limiter Rod
The trim limiter rod prevents excessive trim down.
As the engine is trimmed to the full down position, the bow of the boat goes deeper into the water.
• If the trim limiter rod is left out, the bow could plow into the water causing the boa t to “bow steer” resulting in a loss of control.
• If the trim limiter rod is set too far o ut, the propeller could ventilate, resulting in poor acceleration when the boat is coming onto plane.
Set the trim limiter rod to pre vent excessive trim down and provide good acceleration. The trim limiter rod can be used to prevent the gearcase or
spray deflector from contacting the transom.
When the outboard is returned to the customer, the trim limiter rod must be installed and in the same location as it was when the motor was brought in for service. Leaving the trim limiter rod out, or changing the adjustment, could allow the motor to unexpectedly trim in too far and cause loss of control.
Trim Tab Adjustment
Improper trim tab adjustment can cause difficult steering and loss of control.
A propeller will generate steering torque when the propeller shaft is not running parallel to the water’s surface. The trim tab is adjustable to compensate for this steering torque.
IMPORTANT A single trim t ab adjustment will relieve steering effort under only one set of speed, outboard angle and load conditions. No sing le adjustment ca n relieve steering effort under all conditions.
If the boat pulls to the left or right when its load is evenly distributed, adjust the trim tab as follows:
• With the remote control in NEUTRAL and the engine OFF, loosen the trim tab screw.
• If the boa t pulled to the right, move rear of the trim tab slightly to the right.
• If the boat pulled to the left, move rear of the trim tab slightly to the left.
Tighten the trim tab screw as follows:
• 115 – 200 HP: 35 to 40 ft. lbs. (47 to 54 N·m)
- Trim tab screw COA3663
Test the boat and, if needed, repeat the procedure until steering effort is as equal as possible.
Outboards with High Transom Heights
The trim tab may be above the surface o f t he water when the outboard is trimmed out. Steering effort might increase. Lower the trim setting to submerge the trim t ab and t o reduce steering effort.
Dual Standard Rotation Outboards
Move both trim t abs equally and in the same direction.
Dual Outboards, One Counter and One Standard Rotation
Set both trim tabs to the center position.
Dual-Outboard Alignment
Dual outboards must b e connected with a tie bar and adjusted to a light the outboards for correct water flow to the gearcases and propellers.
Incorrect outboard alignment could cause one or more of the following:
• Propeller ventilation
• Reduction of top speed
• Improper boat tracking
• Engine overheat and powerhead damage
Follow the instructions provided by t he tie -bar manufacturer f or tie bar installation and adjustment.
Measure Alignment
The “toe-in” (gearcase lea ding edge s closer
together than propeller shaft centers) o r “toe-out”
(gearcase leading edges farther apart than propeller shaft centers) is determined as follows:
• Position outboards straight with the anti-ventilation plates parallel with the bottom of the boat.
• Measure between propeller shaft centers.
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• Measure between leading edges of gearcase.
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Alignment Adjustment
Various boat/motor combinations respond differently to dual-outboard alignments. Each application must be thoroughly tested until the idea l combination of performance, steering, and cooling is found.
A common practice is to set-up the outboards parallel, or with a small amount of “toe-out,” an d adjust inward until best results are achieved.
• A typical set-up with 2 -stroke outboards mounted directly on the transom often runs best with a slight amount of “toe-in.”
• Outboards mounted be hind the transom o n motor bracket s usually require “parallel” alignment or “toe-out.”
Adjust the outboard alignments by adjusting tie bar. Follow the tie bar manufacturer’s adjustment procedures.
Check steering operation. Make sure that the steering system operates properly at various trim angles.
Confirm Alignment
To confirm proper alignment, perform the following steps:
• Water test the boat.
• Monitor the water pressure for both outboards.
• Run the boat at various trim angles.
• Perform steering maneuvers and vary the throttle settings.
• Monitor boat and outboard performance.
A sudden loss of water pressure or excessive propeller ventilation on one or both outboards may indicate a misalignment of the gearcases. Reset the outboard alignment and retest.
