PSS Shaft Seal 2-1/2" Shaft 3-1/2" Tube

Shaft Diameter: 2-1/2"
Stern Tube Diameter (D): 3-1/2" to 3-5/8"
Total Length (A): 9.625"
Total Length (compressed) (Compressed A): 8.375"
Rotor Diameter (B): 4.2"
Carbon Cuff Diameter (C): 3.75"
Stern Cuff Length (E): 2"

The PSS Shaft Seal is the number one selling marine mechanical seal
worldwide and is installed as standard equipment by many of the worlds most
reputable boat builders / yards. The PSS Shaft Seal is also recognized as
the premiere retrofit (aftermarket) seal on the world market. Certified by
Bureau Veritas, ABS & Rina: Boat builders / yards recognize the advantages
and value of installing the PSS as it eliminates the maintenance, constant
adjustment & cost associated with traditional packing type glands. Aside
from these benefits, the PSS Shaft Seal helps to eliminate water in the
bilge (100% water tight) & wear to the propeller shaft. The PSS Shaft Seal
can be easily retrofitted and is available for shafts ranging from 3/4"
(20mm) to 6" (150mm).

The PSS Shaft Seal is a mechanical face seal that is created between
the flat surfaces of the rotating stainless steel rotor and the stationary
carbon flange. The stationary carbon flange is attached to the vessels stern tube with hose clamps and the carbon flange is attached to the front side of the bellows with hose clamps. The stainless steel rotor is fit on the shaft
in front of the carbon flange. The stainless steel rotor is used to compress the bellows before the collar is secured to the shaft with set-screws. This
compression (pre-load) maintains contact between the faces and allows the
PSS to compensate for the thrust from the propeller. The carbon flange is
bored larger than the shaft diameter allowing it to "float" around the shaft and thus compensate for most misalignment and vibration problems. The
stainless steel collar is sealed to the shaft by two o-rings that are
recessed into the bore of the collar. These o-rings rotate with the shaft
and stainless steel rotor and do not experience wear during operation.


**As with any rubber hose below waterline, the PSS bellows must be inspected on a regular basis for any sign of wear, aging or chemical deterioration.
PYI suggests as preventative maintenance that the PSS bellow be replaced in
six year intervals. During bellows replacement it is recommended the o-rings & set screws in the stainless steel rotor also be replaced."

Bellows may need to be more frequently inspected in an environment where
non-sealed batteries emit sulfuric acid. Sulfuric acid vapor will accelerate rubber deterioration, as will an ozonater.

The Maintenance Kit includes the items you need to properly maintain your
PSS Shaft Seal. Included in the kit is one (1) PSS bellow, two (2) O-rings,
five (5) set screws, four (4) new hose clamps and an allen key.

American Sourced Marine Parts:  
The product on this page ships worldwide from the United States by Fedex, UPS, Aramex or DHL. 
These are premium services with tracking.  Delivery to most destinations is between 6-9 business days. 
The minimum freight charge is AUD$85 (about US$57) See table below.
All prices shown are in Australian AUD$.
We sell this part by the manufacturer's part number.  These products are special order from the USA, meaning 
there are no returns, no exchanges and no refunds possible.  The sale is final.

Prices include Australian 10% GST, but may be subject to further customs fees or charges if the order is over AUD$1000. 
Shipments outside of Australia are tax free.
Any additional import fees are paid by the customer.  We will assist with customs formalities if necessary.
Manufacturer's warranty applies.  The warranty is in the box.  If a product is dead on arrival, we will replace it.   
Where possible warranty DIY spare parts will be provided.  
MarineDirect Australia will contribute $50 towards your return freight charges to the USA 
within one year of order if there is a warranty issue.
Dangerous Goods: 
Liquids, gels, pastes and replacement lithium batteries may not ship under any circumstances.
Grey Marketing & Compliance:  
Where a brand has an established distributor in 
Australia, we will decline to sell it.  
Most such brands and products have been removed 
from our American listings.     
Some items shown within this category are intended only 
for the American marketplace and 
may not be compliant with Australian Standards 
and in which case we cannot sell them to you and/or will refund you.

Express Freight Charges:  Total freight cost is based on the weigh of the package. 
The default freight charge is $85 for the first kilo.
The shipping weight kg of the item is shown 
under the Specifications tab above.
We use Fedex, UPS, DHL and Aramex Fedex which is generally a 6-9 business day service. Tracking is provided. 
Following your purchase we will calculate the freight charges based on the table below.   The default shipping rate for 1kg for any order is $85. 
If the weight is greater than 1 kilo, then the following additional amounts will be payable in arrears AUD$ and prior to shipping:
 
0-1kg $85 (This is the default rate)
>1-2kg  +$40
>2-3kg  +$65
>3-4kg  +$80
10kg    +$185
15kg    +$240
20kg    +$295
Some bulky items may be classified as oversize regardless of their weight.  Freight charges over 1 kilo will be based on the table above.