Wärtsilä Propeller Shaft Seal
  ManeCraft EM and EY Small Craft Seal  
Sealing water lubricated propeller shafts for the following marine uses:
Boat Building
Boat Repair
Charter Fleets
Fishing Boats
Pleasure Craft
Self Aligning
These seals automatically compensate for face wear, and unlike gland packing they do not need adjustment.
No Shaft Wear
The ManeCraft seal rotates with the propeller shaft, and therefore can not cause damage to the shaft surface.
Maintenance Free
Once fitted, the seal does not require any maintenance, although a regular inspection should be made in common with other hull fittings below the waterline.
Emergency Safety Seal
Should for any reason the seal fail, it can be quickly resolved by tightening the emergency clamp.
Ideal replacement for packed glands (stuffing box) where the shaft has worn. There is no need to replace the shaft.
The ManeCraft seal is easy to fit. Most vessels are easily converted to ManeCraft and while there are many types of stern gland they generally fall into three styles.
Suggestions for conversions are shown below;
The old gland is secured to the stern tube by a short length of flexible hose. Simply remove the hose and fit seal directly to the stern tube.
Remove the gland follower, reverse and re-attach it using sealant between the flange faces. This will provide a short cylindrical protrusion on which to mount the seal.
Remove the large nut(s) completely to expose the threaded tube. Fill the thread with a sealant and fit the seal onto the tube.
The ManeCraft seal is designed specifically to meet the demanding requirements of today's Pleasure and Commercial craft. ManeCraft incorporates the wealth of experience gained by Wartsila, leaders in the development and manufacture of seal for Naval and commercial shipping. Wartsila seals are used on applications as diverse as submarines and semi-submersable oil platforms to aircraft carriers and super-tankers.
How does ManeCraft work? Click on the above image to view the brochure

The ManeCraft seal comprises two main components; the Stationary Seat assembly and the Rotating Seal assembly, both moulded from tough oil resistant Chloroprene.

The Stationary Seat has a solid bronze ring bonded into it and is clamped onto the sterntube by two stainless steel hose clamps, this part remains stationary.
Incorporated into the stationary seal is a Red Emergency Clamp. The safety feature is for emergency use only and is protected by a tamper proof tag.

The Rotating Seal assembly is clamped onto the shaft whilst being compressed against the seat. As the shaft rotates so does the seal assembly. The sealing face seals against the stationary bronze seat, lubricated and cooled by the water inside the seal and aided by a water flush.

An air vent is incorporated in the flush system to avoid air locks preventing the water cooling the face. This also means that when the boat has been slipped no action is needed on re-launch.

ManeCraft seals are easy to fit and are direct replacements for old style propeller shaft packed glands (stuffing box). They do not require packing, adjusting, or maintenance and cannot wear a groove in the shaft. Following installation, all they need is a quick inspection in common with sea cocks, hoses and other hull fittings located below the waterline.

On monitored vessels, ManeCraft seals have in excess of 10,000 hours of service, or 100,00 sea miles and are in perfect condition. On most vessels, age will be the deciding factor, rather than service hours, when renewal will be necessary. With the low cost involved, replacement of such an essential component every five years is recommended.

ManeCraft range dimensions
Seal Size Reference
EM Seal (metric)
Shaft Diameter Sterntube Diameter Overall Length Maximum Shaft Speed
Set #2 25 - 30 35 - 43 131 2950
Set #3 25 - 30 43 - 51 131 2950
Set #4 30 - 35 43 - 51 131 2850
Set #5 30 - 35 51 - 60 131 2850
Set #6 35 - 41 51 - 60 131 2750
Set #7 35 - 41 60 - 70 131 2750
Set #8 43 - 46 70 - 80 131 2600
Set #9 46 - 51 70 - 80 131 2600
Seal Size Reference
EY Seal (metric)
Shaft Diameter Sterntube Diameter Overall Length Maximum Shaft Speed
Set #14 55 70 - 80 137.5 1550
Set #15 60 80 - 90 137.5 1500
Set #16 65 90 - 100 137.5 1500
Seal Size Reference
EY Seal (imperial)
Shaft Diameter Sterntube Diameter Overall Length Maximum Shaft Speed
Set #11 2.1/4" 3.1/2' 5.13/15" 1550
Set #12 2.1/2" 3.1/2" 5.13/15" 1500
Set #13 2.3/4" 4" 5.13/15" 1500
Also available from C.E.& A. Co.
Propeller Shaft and Rudder Bearings Propeller Shafts
Sterntubes and Rudder Trunks Rudder Carrier Bearings
Oil Lubricated Shaft Seals Deck Machinery
Water Lubricated Shaft Seals Chockfast Orange
ManeCraft - small boat seal Polyflex - Engine Mounts and Couplings
Spurs - Rope, Net and Weed Cutter Arctic Steel Water Strainers
Vickers Marine Oils Home Page
For further information, or to purchase a ManeCraft Seal please contact us.
  5 Schenker Drive, Royal Park.
South Australia. 5014

Ph: 08 8240 0777

Int. Ph: +618 8240 0777 E-mail: