This is an Adapter Kit Used To Mount Tru Turn Aluminum Spinners Onto The: Saito 1.20 (old) single, 150 (old) single, 170 Radial, 1.80 (old) single and 3.25 four stroke engines. (For Pre-1999 Saitos See COMMENTS)

FEATURES: Steel Adapter Nuts Screws Onto The Crankshaft Holding the Propeller On, Then A 10-32 Bolt Screws Into The Nut From Front, Holding The Spinner In Place.

INCLUDES: One Short Shaft Double Jam Nut Adapter Kit

REQUIRES: 1/2" End Wrench To Tighten Tru Turn Aluminum Spinner

SPECS: Crankshaft Thread Size: 8 x 1.25mm Spinner Mounting Bolt Thread Size: 10-32

COMMENTS: While This Adapter Does Not Use A Bushing, It Is REQUIRED That Some Modifications Be Made To The Spinner Backplate. The Backplate Must Be Reamed Out To 10mm (.394) For 1.20 or Larger (Except 1.30) Engines. This Must Done Accurately! Use The Saito Aluminum Washer Under Your Tru Turn Adapter Nut and Washer, Then Check Closely For Threads Bottoming Out Or Interfering. Tru Turn Will Modify Backplate For A Small Fee and Postage Paid. The 10-32 Bolt That Is Included With The Spinner Might Require Cutting, Depending On The Prop Used. Older Saito Engines (Pre-99) Will Use The TT-0828-A. This MAY BE REPLACED BY The TT-0822-A and CAN NOT Be Used In ANY NEW Applications.