3" Recmar 3-Inch Marine Exhaust Riser Kit – MerCruiser GM V6/V8 (OEM 864929A3)
3" Recmar 3-Inch Marine Exhaust Riser Kit – MerCruiser GM V6/V8 (OEM 864929A3) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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3" Recmar 3-Inch Marine Exhaust Riser Kit – MerCruiser GM V6/V...
3" Recmar 3-Inch Marine Exhaust Riser Kit – MerCruiser GM V6/V8 (OEM 864929A3) is backordered and will ship as soon as it is back in stock.
Product Details
This 3-inch Recmar marine exhaust riser kit is a replacement exhaust-riser solution for selected MerCruiser inboard applications. The catalog identifies the kit as a 3-inch (76 mm) riser and cross-references it with MerCruiser OEM part number 864929A3.
An exhaust riser raises the exhaust outlet above the manifold connection and helps route exhaust and cooling water away from the engine. Confirm the riser height, connection size, manifold configuration, engine model, year and serial-number range before ordering.
- 3-inch (76 mm) marine exhaust riser kit.
- Aftermarket Recmar replacement for the listed MerCruiser application.
- Catalog reference: Recmar MAR929 and OEM 864929A3.
- Fitment depends on the exact engine configuration and serial-number conditions.
Part Number Matrix
Use these documented reference numbers when comparing the original component and application catalog.
| Brand | Part Number | Reference Type |
|---|---|---|
| MerCruiser | 864929A3 | OEM reference |
| Recmar | MAR929 | Catalog reference |
Engine & Model Compatibility
The Recmar catalog places this 3-inch riser kit with selected MerCruiser GM V6 and V8 manifold applications. The listed engine families include the following configurations; verify the complete engine identification and serial-number range before purchase.
| Brand | Engine family | Displacement / configuration | Year condition | OEM reference | Fitment note |
|---|---|---|---|---|---|
| MerCruiser | GM V6/V8 | 4.3L, 5.0L, 5.7L or 6.2L; MAG/MPI applications are listed in the catalog | 2002 and later | 864929A3 | Confirm the manifold, riser height, 3-inch connection and exact serial-number range |
Technical Specs
- Product Type
- Marine exhaust riser kit
- Riser Size
- 3 inches / 76 mm
- Brand
- Recmar
- OEM Reference
- MerCruiser 864929A3
- Catalog Reference
- MAR929
- Application
- Selected MerCruiser GM V6/V8 inboard manifold applications
- Installation
- Replacement installation at the exhaust manifold connection; use the engine manufacturer's service procedure
What’s in the Box
- 1 x 3-inch marine exhaust riser kit
Gaskets, bolts, clamps and other installation items are not separately confirmed here. Compare the kit contents with the supplier's current package information before ordering.
Installation Notes
- Verify the original riser size, manifold pattern, OEM reference and engine serial-number range before beginning work.
- Disconnect the vessel battery and close the raw-water seacock.
- Allow the engine and exhaust system to cool completely.
- Drain or contain coolant and raw water as required by the engine manufacturer's service procedure.
- Disconnect the exhaust hose and remove the fasteners securing the original riser.
- Remove all old gasket material and corrosion from the mating surfaces without damaging the manifold.
- Inspect the manifold, hoses, clamps and fasteners. Replace damaged or corroded parts as required.
- Install the replacement riser with the correct gasket and approved fasteners for the engine application. Do not reuse sealing components unless the service procedure specifically permits it.
- Tighten the fasteners in the manufacturer's specified sequence and to the manufacturer's specified torque.
- Reconnect the exhaust hose and cooling-water connections, then reopen the seacock and restore the cooling system.
- Reconnect the battery, start the engine and inspect carefully for exhaust, water and coolant leaks.
Troubleshooting & FAQ
How do I know if this riser kit fits my engine?
Use the OEM reference 864929A3, the 3-inch (76 mm) riser size and the listed MerCruiser GM V6/V8 application as starting points. Confirm the exact engine model, year, serial-number range, manifold configuration and original riser dimensions before ordering.
What are the signs of a failing exhaust riser?
Possible signs include overheating, external water or exhaust leakage, rust or scale around the riser, reduced engine performance, difficult starting, or water contamination in the engine oil. Stop using the engine and investigate promptly if water intrusion is suspected.
How often should an exhaust riser be inspected?
Inspection intervals depend on the engine manufacturer, operating environment, water quality and service history. Inspect the riser and manifold during scheduled maintenance and whenever overheating, corrosion or water intrusion is suspected.
Does the kit include gaskets and mounting hardware?
The available catalog evidence identifies this product as a 3-inch riser kit but does not clearly confirm the individual package contents. Verify whether gaskets and fasteners are included before ordering.
Is this an OEM component?
No. This is a Recmar aftermarket replacement identified for comparison with MerCruiser OEM reference 864929A3.
What should I check before installation?
Compare the new riser with the original part, including the connection size, mounting pattern, height, hose position and manifold interface. Do not install the part if any critical feature differs from the engine manufacturer's specifications.
Safety & Important Info
- Marine exhaust and cooling systems can contain hot surfaces, pressurized fluids and exhaust gases. Allow the engine to cool before service.
- Verify the complete engine and serial-number fitment before purchase; a general engine-family match alone does not confirm compatibility.
- Use the engine manufacturer's service information for gasket selection, sealants, fasteners, torque values and testing procedures.
- Professional marine service is recommended when exhaust-system condition or water intrusion is uncertain.
About Sea Sierra
- Pro-Grade Standards — We supply marine replacement parts selected for practical service applications.
- Manufacturer-Direct Value — We focus on clearly identified aftermarket replacement components and application references.
- Application Support — Compare the original part and complete engine identification before ordering.
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