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Packless seal that uses a self-aligning carbon-graphite stator to ensure watertight seal with low wear and corrosion.
[PYI Inc., Lynnwood, WA, USA]
Couplings for thrust-bearing and non-bearing use from 200 through 2500 HP.
[Soundown Corporation, Salem, MA, USA]
This two-part shaft reduces vibration and increases propulsive efficiency. It can be flexibly connected to both the hull and the engine.
[Seatorque Control Systems, LLC, Stuart, FL, USA]
Shaft seal with self-adjusting inner lip seal remains in constant contact with the shaft for dripless operation. Three stock models in several sizes, or custom models available.
[Nautical Specialties, Harrison Twp., MI, USA]
Oil-lubricated shaft system including thrust bearing, lubricated shaft log, and shaft with connectors to propeller and engine. Claimed to improve speed, propeller efficiency and fuel economy, while reducing hull vibration and noise.
[The Evolution Company, Inc., Rockland, ME, USA]
This mount can be soft to reduce engine vibration because a separate part of it handles the horizontal thrust of the engine. It can avoid the need for thrust bearings in the drive train. Company also makes a standard Metalastic Cushyfloat motor mount.
[Evolution Company, Inc., Rockland, ME, USA]
Provides a flexible, non-metallic barrier between transmission and propeller shaft. Reduces drivetrain vibration, shock, misalignment, and electrolysis.
[Globe Composite Solutions, Ltd., Dallas, TX, USA]
Thrust bearing unit reduces vibration and strain by transferring the propeller′s push to the boat, not the engine. Makes drive train alignment less important. For engines 10 to 1,000 hp.
[PYI Inc., Lynnwood, WA, USA]
Flexible coupling compensates for misalignment, absorbs and dampens shock loads and shaft vibrations, prolongs the life of machinery, and isolates metal-to-metal for quietness.
[The Evolution Company, Inc., Rockland, ME, USA]
Proper Pitch sells new and straightens and cleans used drive shafts bringing them back to factory specifications. Shafts can be fitted to the engine coupler for much easier installation.
[Proper Pitch LLC, Selbyville, DE, USA]
Electrolysis, Grounding and Corrosion
The most critical part of an engine replacement is the new engine alignment with the prop shaft. The tolerance on this is .004 inch maximum.
Mike Lehman
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My Boats