Kohler - Water Outlet Gasket - 229963
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The Kohler 229963 Water Outlet Gasket is a cooling-system sealing gasket used on compatible liquid-cooled Kohler marine and industrial generator engines. It seals the joint between the water outlet neck, thermostat housing, or cooling outlet flange and the engine block or cylinder head, helping prevent coolant or raw-water leakage around the thermostat housing area. This gasket is typically replaced whenever the water outlet or thermostat housing is removed for service.
Key Features
- Kohler part number: 229963
- Product type: Water outlet / thermostat housing gasket
- Application location: Water outlet neck or thermostat housing flange
- System: Liquid-cooled generator engine cooling circuit
- Primary function: Seals the cooling outlet joint against coolant or raw-water leakage
- Service use: Thermostat replacement, cooling-system repair, outlet housing reseal, and leak repair
- Typical application type: Kohler marine and industrial generator sets where the parts diagram calls for 229963
- Material type: Thin-profile cooling-system gasket material suitable for liquid-cooled engine service
Generator Compatibility
This gasket is intended for compatible Kohler liquid-cooled generator engines that specify 229963 in the cooling-system parts breakdown. It is commonly associated with thermostat housing and water outlet service on select Kohler marine and industrial generator platforms.
Potential application areas include mid-range Kohler generator families, but fitment must be confirmed by generator model number, spec number, serial number, engine family, thermostat housing design, and Kohler parts diagram.
Fitment Notice
Do not select this gasket by generator kW rating alone. Kohler generator sets can use different thermostat housings, water outlet necks, engines, and gasket profiles depending on model, spec, production range, and cooling configuration.
Before ordering, confirm the Kohler generator model, spec number, serial number, and cooling-system diagram. If the old gasket is available, compare the bolt holes, water passage shape, outside profile, and housing layout before installation.
When This Part Needs Replacement
Replace this gasket whenever the thermostat housing or water outlet neck is removed. It should also be replaced if there are signs of coolant seepage, raw-water leakage, rust trails, salt deposits, glycol staining, crusted residue around the housing joint, overheating related to coolant loss, or leakage after thermostat service.
A used water outlet gasket should not be reused after disassembly. Compression set, heat cycling, coolant exposure, and old gasket residue can prevent it from sealing correctly a second time.
Installation Notes
Drain or isolate the cooling system as required before removing the water outlet housing. Clean both mating surfaces carefully and remove old gasket material without gouging the housing, block, or cylinder head sealing face. Inspect the thermostat, housing neck, fasteners, hose connections, clamps, and nearby coolant passages while the housing is apart.
Install the new gasket in the correct orientation so the bolt holes and coolant passage align properly. Follow the Kohler service manual for gasket placement, sealant guidance, fastener tightening sequence, torque specification, coolant refill, bleeding, and leak testing. After reassembly, run the generator to operating temperature and inspect the housing joint for leaks.
Alternate/Superseded Part Numbers
- Kohler: 229963
- Common description: Water Outlet Gasket
- Application reference: Kohler liquid-cooled marine / industrial generator thermostat housing or water outlet gasket
Parts Desk Insight
Cooling-system gaskets on generators are best matched by the generator’s model and spec number, not just by kW size. Similar Kohler generator sets can use different engines and outlet housings. If the thermostat housing is already open, replacing the gasket during reassembly helps avoid repeat coolant leaks in the generator compartment.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
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Item must be in new, unused condition
Product must be in its original packaging
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Packaging must be undamaged and suitable for resale
Important:
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