FREQUENTLY ASKED QUESTIONS
Q. WHY DOESN'T MY PROP EXTENSION GO ALL OF THE WAY ON?
A. Check to make sure your starter ring is installed.
Q. WHAT PREP WORK SHOULD BE COMPLETED BEFORE INSTALLING MY NEW SABER PROP EXTENSION?
A. Clean, deburr, and remove any raised metal on your engine flange, hub, flywheel & lugs. Any raised metal on your engine flange, hub, or lugs could cause the Prop Extension to angle off from the center line and compromise parallelism between the engine flange and the Prop Extension flange. You should also clean the threads of the engine flange lugs.
Q. WHAT IS THE PROCEDURE TO TORQUE MY NEW SABER PROP EXTENSION?
A. Torque the bolts in a crossing pattern (1,4,6,3,5,2). The torque values for the engine flange to the Prop Extension are as follows:
3/8" bolts: 30 ft-lbs
7/16" bolts: 35-45 ft-lbs
1/2" bolts: 40-50 ft-lbs
The torque should be applied in three equal steps (for example 10,20,30 ft-lbs for 3/8") and at least one final pass at full torque. The torque value for the propeller comes from the propeller manufacturer. When requesting the torque value from the prop manufacturer, be sure to let them know whether the prop side of your Prop Extension is 6" in diameter or 7" in diameter. The crush plate and Prop Extension flange should be the same diameter.
On engine bolts that can't use lock nuts or safety wired then apply blue Loctite No.242 to the threads.
Q. WHAT IF MY PROP EXTENSION WILL NOT SLIDE ALL OF THE WAY ON?
A. The prop extension is manufactured with very tight tolerances. You may need to rotate the extension one or more lug holes to find the spot with the perfect fit.
Q. WHY ARE THERE ROUGH SURFACES BETWEEN THE PROP EXTENSION AND THE REAR BULKHEAD?
A. The rear spinner bulkhead 2-1/4" center hole is hitting the 1/32" tool nose radius on the prop extension between the 2-1/4" center boss and the face of the prop extension. Using a deburring tool, go around the rear spinner bulkhead 2-1/4" center hole until the bulkhead sits flat against the prop extension. Then, stone the bulkhead to remove any high spots.
Q. MY EXTENSION WON'T GO ON MY ENGINE FLANGE.
A. Put a square on your engine lugs at 12 O'clock and 3 O'clock.