Pro-boat PRB4150 User Manual download pdf (Page 10)

Blackjack 29

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Always replace the flex shaft when it is damaged or

shows visible wear or injury and property damage may

result.

Lubricating the flex shaft is vital to the life of the

drivetrain. The lubricant also acts as a water seal, keeping

water from entering the hull through the stuffing box.

Lubricate the flex shaft, propeller shaft and all moving

parts after every 2–3 hours of operation. Always replace

any parts that show visible wear or damage.

1. In the hull, use tools to loosen the collet nut (A) from

the flex shaft (B).

2. Turn the rudder (C) and remove the flex shaft from

the stuffing box (D) and drive strut (E) at the rear of

the boat.

: Use paper or cloth to touch the flex shaft.

3. Wipe lubricant and material from the flex shaft.

Lubricate the full length of the flex shaft assembly

up to the drive dog using marine grease (PRB0101 or

PRB0100). Also apply grease to the collet threads.

4. Carefully reinstall the flex shaft in the drive strut,

stuffing box and collet. If the flex shaft is difficult to

remove or install in the collet, use a flat screwdriver to

spread the grips of the collet.

Ensure there is a 1–2mm gap and a washer (F)

between the drive strut and drive dog (G) to allow for

flex shaft shrinkage under load

 Running the boat in saltwater could cause

some parts to corrode. If you run the boat in saltwater,

rinse it thoroughly in freshwater after each use and

lubricate the drive system.

 Because of its corrosive effects, running RC

boats in saltwater is at the discretion of the modeler.

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Always replace a damaged propeller.

1. Use a tool to loosen or tighten the prop nut (G) on the

prop shaft (B).

2. Align the propeller (H) with the drive dog (F) on the

prop shaft and tighten the prop nut.

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Pro-boat PRB4150 User Manual Page 10