User Manual

Rudder Service

1. Disconnect the water tube from the rudder.

2. Remove the nut, screw and linkage from the rudder arm.

3. Turn the rudder and loosen the set screw from the rudder pin.

4. Turn over the boat and lightly tap the rudder to remove the pin.

5. Assemble in reverse order.

Propeller Service

1. Use an 8mm nut driver (DYN2805) to loosen the nut from the

driveshaft.

2. Remove the nut and propeller from the driveshaft.

3. Assemble in reverse order. Correctly align the propeller with

the drive dog on the driveshaft.

Prop Angle Adjustment

Raising the prop strut increases speed, but also decreases

steering response and increases cavitation.

Lowering the drive strut increases steering response, but

also increases steering sensitivity and decreases speed.

1. Loosen 2 bolts and 2 nuts from the drive strut on the rear

of the boat.

2. Slide the strut up or down to change the angle of the

propeller in relation to the hull.

3. Adjust as desired and tighten the nuts and bolts.

TIP: Finding the proper prop angle will reduce the chance of

a blow over and/or porpoising.

Weight Tuning

Depending on battery size and weight, additional ballast may

be required to keep the nose of the boat down in rough

conditions.

1. Add adhesive weights (LOSA99201) in front of the ESC.

2. Slowly add the weights and test the boat’s performance.

Add or subtract weight until you achieve your desired

performance.

Blackjack 42-Inch Brushless 8S Catamaran