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 The prop should be spaced 

approximately 1/8 of an inch from the 

underside of the hull with a 1/8 inch gap 

between the drive dog and stern tube. 

  Mark the Stern Tube where it 

passes through the hull. This marks 

the area you will sand. From the 

Bow, check the alignment of the 

Prop Shaft to the Turn Fin. Slide the 

Motor Base left or right to center the 

Propeller. 

The motor base or prop shaft assembly 

should not bind to the hull. Adjust the 

motor mount screws or the length of the 

slot in the hull to align the prop location. 

Clean off any grease residue and then 

scuff the Stern Tube so it will bond 

with the filled epoxy when installed. 

Sand the recesses for the Motor Base 

and the Stern Tube slot. 

You can glue the Motor Base and 

Stern Tube at the same time, or 

separately. “Same time” follows: 

Put more of the filled epoxy into the 

motor base recess of the hull liner. Be 

generous.  

Mix two 1-1/2 inch puddles of parts A 

and B epoxy together. Add filler. 

Brush on the underside of the Motor 

Mount Base.  

10 

79 

80 

81 

Install the Motor Mount as shown with the 

6-32 x 1/4 inch screws centered in the base 

slots of the mount. Tighten the screws. 

82 

Install the 3-piece Thrust Bearing and the 

Coupling, adjusting so the coupling pushes 

against the bearing without binding.  

83 

84 

Install the motor with the M3 screws 

in the lowest position on the Mount. 

Lightly grease the Thrust Bearing. 

85 

Put a tiny piece of electrical tape over 

the center of the T-Nuts to prevent 

epoxy from filling the threads.  

86 

87 

88 

89 

90 

Grease Bearing 

Assemble the Prop Shaft Assy. Put the 

Shaft into the Coupling with the 

flat

 of 

the shaft under the set screw & tighten.  

Scuff the underside of the wood base 

so the epoxy will bind to the wood. 

Summary of Contents for Vac-U-Cracker

Page 1: ...ainless steel rudder blade that swings up on impact reducing the risk of damage to the rudder components A stainless steel pushrod and DuBro EZ Connector are included The rudder base is designed to fi...

Page 2: ...connected to the boat Even if it is turned OFF assume it can glitch and run on its own Never run the boat if swimmers are in the water Don t chase wildlife Be careful with rechargeable batteries They...

Page 3: ...he waste on your left should be easier Cut carefully Afterwards use sandpaper to level any uneven spots Drill 1 4 inch holes in these locations They will provide ventilation under the hull liner so an...

Page 4: ...of the parts of the bottom that contact the hull Do not epoxy the drain channels along the center of the liner Take the two pieces of wood or hardback books and wedge them to an angle to match the bot...

Page 5: ...ler where the arrow is pointing This end is higher and allows clearance for the rudder blade Rough trim the Hatch to about 1 4 inch outside of the marked line Test fit the Hatch to the Deck Sand the h...

Page 6: ...tion if lost Apply CA around the inside along the bottom one quarter inch of the Helmet Tilt the Helmet forward while lifting gently at the rear Note the mount is slightly forward compared to the driv...

Page 7: ...the Hull onto the Deck at the Stern first then rotate the Deck down at the bow as you help the Hull sides slip into the Deck flange where the sealant is applied Let this fully cure Support the deck u...

Page 8: ...8 58 59 60 Repeat scoring both sides of the raised line until you are through the hull Remove the strip of plastic at the center 62 63 64 65 66 HARDWARE INSTALLATION Use these instructions to install...

Page 9: ...available White lithium grease or a synthetic grease works well They can be thinned Push out the excess grease by inserting the Drive Shaft Clean any excess grease from the Stern Tube with solvent Th...

Page 10: ...e time or separately Same time follows Put more of the filled epoxy into the motor base recess of the hull liner Be generous Mix two 1 1 2 inch puddles of parts A and B epoxy together Add filler Brush...

Page 11: ...e center hole 1 4 to 3 8ths inch diameter Remove the rudder from the transom Temporarily install the rudder with 2 screws Use the Bru Line Pushrod Boot Bracket as a template to mark the centers for th...

Page 12: ...le in the transom Mark the servo for mounting to the floor Mount with Epoxy or Servo Tape 12 103 104 105 Insert the Pushrod Boot into its mount as shown 106 Put a little grease on the pushrod to help...

Page 13: ...er the paint has fully cured Cut out the desired decal from the set Separate the paper backing from the front tissue The decal will adhere to the front tissue Place the decal on the hull and smooth it...

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