The variables include:
• Outside diameter of the rudder shaft. Different boats use different size rudder shafts.
• Inside diameter of the rudder shaft. Some boats require the additional strength of a double wall rudder shaft. The double wall reduces the inside diameter. Since the rudder shaft extension fits inside of the rudder shaft, this change necessitates a change in the diameter of the rudder shaft extension.We offer two diameters. This part number, Z3486, has an outside diameter of 2-5/16"
• The rudder retaining bolt varies in diameter. This bolt is at the top of the rudder shaft. The machined slot in the bottom of the rudder shaft extension engages the rudder retaining bolt. Our rudder shaft extension is machined with a 1/2" wide slot. It is a direct fit to rudders with a 1/2" rudder retaining bolt. If your boat has a 3/8" diameter rudder retaining bolt, we include a sleeve in every kit to adapt the 3/8" bolt to the 1/2" wide slot for a proper fit.
• Different boat models were equipped with different length rudder shaft extensions. Catalina Direct's rudder shaft extension has tiller holes at three locations. Use it as is or trim as desired for easier storage aboard smaller boats. Florida built boats were often supplied with a 35" long shaft, while California built boats were supplied with a 32" long shaft, although the stock 35" length may work. Catalina 320 emergency tiller shafts were specified at 27" long. Three holes in the rudder tube extension accommodates all three of these dimensions.

Known uses (boats with single wall rudder shaft):
• Catalina 309
• Catalina 310
• Catalina 320
• Catalina 34, 1989 and later with walk through transom (hull #1028 ->)
• Catalina 36, 1989 and later with walk through transom (hull #1040 ->)

Known uses (models that had single wall rudder posts during early production through about 2008):
• Catalina 350
• Catalina 375
• Catalina 387
• Catalina 400
• Catalina 42

• Any replacement rudder for the above boats that were built with single wall construction.

• 35" aluminum vertical rudder shaft extension
• Emergency tiller with grip, clevis pin & cotter ring, bolt and nylock nut for proper attachment to rudder shaft extension. (30" long from bend)
• Bag, heavy duty, with draw string
• Bushing for retainer bolt (some configurations may not require)
• Instructions

1) Always verify the inside diameter of your rudder post. This kit is for a rudder shaft with an inner diameter of approximately 2-1/4". If the inside diameter is about 1-15/16" see part #Z3487 listed below under "May we also suggest:".

2) OEM rudder posts are filled with foam that is then ground out or drilled out to make room for the emergency tiller. The shafts in this kit require ~ 3" of clearance below the retainer bolt.

3) If the bushing is necessary for your boat, the bushing will need to be trimmed to fit the inside of your rudder post. Note: The Marelube included with the tiller kit must be used on both the bolt and bushing to prevent the two from corroding together. Support your rudder before removing the bolt by blocking up the quadrant or from outside the boat for the Catalina 28 and Catalina 30s.

4) This is an oversize item which does not conform to our standard shipping policies. Call 800/959-SAIL for a shipping estimate.

5) Test fit this to your boat immediately upon receipt so that you'll know for certain that this is configured correctly. The first time you need it would be a most unfortunate time to discover that it needs to be modified to work properly!