Water pump bearings, transmission bearings for sterndrives
The primary function of a bearing is to reduce the friction between moving parts. This is achieved by using two races and small balls between them. The shaft is pressed into the inner race, while the outer race is pressed into the bearing housing; thus, the shaft rotates freely while the bearing keeps it in place. Lastly, bearing retainers secure the shaft and the bearing in position.
Technically, every moving part in an outboard, inboard, or sterndrive engine depends on at least one bearing. Some old applications are using plain bearings (bushes), especially when it comes to old Jabsco pumps, but the basic principle is the same. The ball bearings have replaced such bushings and made their subcomponents less dependent on maintenance, especially with the sealed-type bearings, where lubrication is not required.
Poseidon Marine offers bearings and bearing kits mostly for water pumps and transmission systems. Our bearing selection is focused on the quality without compromise, given that such a repair may be difficult, or at least time-consuming. Products branded as “PoseidonMarine®” always feature the best possible bearings, including SKF, KOYO, NTN, NACHI, FAG, and other members of the World Bearing Association. When such a reference is not available from such a manufacturer, we resort to other quality Japanese brands, like KYK bearings, or the French SNR.
We manage to offer such great prices since many of these bearings are manufactured in Bulgaria. This fact gives us the advantage of buying directly from the SKF assembly in Sopot, minimising the cost of transport and the profit of middlemen in the sales chain. Last but not least, we try to choose bearings packed in nylon blisters; besides the obvious cost of packing, it is easier to recycle them.
Set aside the quality of the bearings; the sealing components are also crucial to the lifespan of the bearings. Our oil seals always use a stainless steel spring that withstands the increased demands of a marine environment. To conclude, every bearing kit purchased from Poseidon Marine is warranted to be free from defects in materials or workmanship under normal use and service.
Here are some popular bearing kits purchased from PoseidonMarine:
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PoseidonMarine® Water pump repair kit Yanmar 1GM 1GM10 pump 128170-42200
- PoseidonMarine® Water pump repair kit Volvo Penta Diesel 3583115 877373 3841697 10-24524
- PoseidonMarine® Circulation pump repair kit Volvo Penta AQ165 AQ170 831742 831720
- PoseidonMarine® Water pump repair kit Yanmar -YEU 2YM 3YM X03431748 X03431760 128990-42200
- PoseidonMarine® Water pump repair kit Yanmar 6LP 119773-42600 119773-42500
- PoseidonMarine® Flywheel Repair kit Volvo Penta D31 D41 V6 V8 SP DP 11013 181105 958860 22075
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PoseidonMarine® Water pump repair kit Yanmar 3JH 4JH 129670-42513 129670-42560
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PoseidonMarine® Water pump kit Volvo Penta MD2010 MD2020 MD2030 MD2040 D1-13 D1-20 3593659
- PoseidonMarine® Water pump repair kit Yanmar 2GM 3GM 104211-42070 128270-42000
Frequently Asked Questions about Bearings, Water Pumps, and Flywheel Repairs:
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What are the signs of a bearing needing replacement?
A bearing that needs replacement will produce squealing, grinding, or wobbling sounds, caused by the uneven rotation. The reason might be normal wear due to the constant friction, or water intrusion inside the ball of the bearing.
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What are the signs my seawater pump needs new seals?
As a general rule, a pump using rotational seals will need new ones every 500 hours or each season; this is the standard service interval. If the oil seals are compromised, the pump will start dripping slowly, before a bigger leak. This can cause serious problems to your cooling system, due to insufficient water supply, and air intrusion in the cooling system.
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My water pump shaft has a groove at the oil seal level. What to do?
All water pump shafts have a service life of 1500-3000 hours. After this period, the shaft starts forming small grooves around the oil seals due to the constant rotation. Eventually, the seals will be destroyed, and your pump will start leaking. A set of new seals will solve the problem, but this is a temporary solution, since the groove will damage the new seals as well. The shaft needs to be replaced with a new one. If a new one is not available, you can smear the groove and polish the shaft at that place, then apply new oil seals with slightly shortened springs. PoseidonMarine offers a large variety of water pump shafts for Volvo Penta and Yanmar.
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What are the signs of a failed flywheel bearing or a gimbal bearing?
The main symptom is a wobbling sound and vibration when you are in gear and turn all the way to either direction.
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How to remove the flywheel bearing(s) on a Volvo Penta?
This is a demanding repair that requires pulling out the flywheel housing with the primary shaft. First, you need to pull out the oil seal that covers the bearing(s) located on the outer part of the housing. After that, you will need to remove the bearing retaining ring(s). When all of the retaining rings are removed, you can place a piece of wood and push out the primary shaft with the help of a mallet. Do not hit the shaft directly; always use a wood or similar element in between. As soon as you remove the shaft, remove the inner bearing retainer and press out the bearing(s).
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How to install the flywheel bearing(s) on a Volvo Penta?
This is the reverse process of the dismantling. Install a new oil seal on the engine side of the flywheel housing, then press in the new bearing(s) and install a new inner retaining bearing. After that, the shaft/bearing assembly can be pushed into the flywheel housing. Secure it with a set of new bearing retainers. PoseidonMarine offers complete flywheel repair kits that include all bearing retaining rings, oil seal(s), and bearing(s).
