TIDES MARINE FSK-2500-4000-1 SureSeal Drip-Free, Self-Aligning Propeller Shaft Seal w/ TWO Water Injection Fittings



Shaft Shaft: 2 1/2"   
Stern Tube: 4"        
Minimum Distance: 7 1/4"      

Housing

Made from fiber-reinforced composite material, the Tides Marine shaft seal housing is strong, durable and compact. The SureSeal is dimensionally unaffected by temperature and will not absorb water.

Bearing

The integral PTFE bearing extends the operating life of the SureSeal under normal operating conditions.

Hose

Connecting the SureSeal to the vessel is now easier with an “articulating hose”. This hose design automatically positions the SureSeal the correct operating distance from the stern tube. No measurements are required – installation is simplified. The articulating hose reduces side loads to the SureSeal when shaft misalignment occurs. As a result, lip seal and bearing life are extended.

Lip Seal Replacement

The SureSeal design incorporates a removable front cap which improves access to the lip seal. A worn lip seal can be replaced, even while the vessel is in the water, restoring the “100% watertight” characteristic of the SureSeal.

Before Ordering

SureSeals® are sold as a kit which includes a section of articulating hose (in most instances) and four hose clamps. To determine

1) If you have enough space to install a SureSeal® and
2) Which SureSeal® to order, you must have:

(All Dimensions are in Inches)

Without Spare Seal Carrier Kit

A. Shaft Diameter is: 2.500
B. Stern Tube Outside Diameter is: 4.000
C. Minimum Distance required from the End of the Stern Tube to the Coupler: 7.250
D. Overall Height of the SureSeal Housing: 4.185 Minimum Clearance Required: 2.600 from the centerline of the shaft.
E. Distance from the End of the Stern Tube to where the Lip Seal will ride on the shaft: 4.700

With Spare Seal Carrier Kit

A. Shaft Diameter is: 2.500
B. Stern Tube Outside Diameter is: 4.000
C. Minimum Distance required from the End of the Stern Tube to the Coupler: 8.500
D. Overall Height of the SureSeal Housing: 4.185 - Minimum Clearance Required: 2.600 from the center line of the shaft.
E. Distance from the End of the Stern Tube to where the Lip Seal will ride on the shaft: 4.700

Verify that the dimensions given above will fit your application. ( Optimally you should have 3/4 inch to either side of Dimension E of pristine shaft conditions.)

A hose running from a point on the engine’s raw water cooling system to this single injection fitting will deliver cooling / lubricating water to the SureSeal. This water supply should produce a minimum of 1 gallon per minute at idle at approximately 2 psi. It should increase as you throttle up.

*** The SureSeal is not recommended for engines with less than 4 cylinders

*CAUTION: THE TURN OF THE EXHAUST RISER MUST BE ABOVE THE REST OF THE EXHAUST SYSTEM BEFORE OPERATING THE VESSEL YOU MUST TEST THE WATER SUPPLY