Exhaust Manifold Kit for MerCruiser 3 in. Closed Cooling Dry Joint — 864929A2
Exhaust Manifold Kit for MerCruiser 3 in. Closed Cooling Dry Joint — 864929A2 is backordered and will ship as soon as it is back in stock.
7-Day Returns
7-Day Returns
We accept returns on most items for 7 days.
Speedy Delivery
Speedy Delivery
In-stock orders ship the next day, from the warehouse closest to you.
Exhaust Manifold Kit for MerCruiser 3 in. Closed Cooling Dry Joint ...
Exhaust Manifold Kit for MerCruiser 3 in. Closed Cooling Dry Joint — 864929A2 is backordered and will ship as soon as it is back in stock.
GH MARINE / BELLOWS & RELATED PARTS
About this part
Exhaust manifold kit referenced to Mercury Quicksilver 864929A2, Sierra Marine 18-1844K, and GLM 50373 for MerCruiser stern drive applications using a 3 in. (76 mm) closed-cooling dry-joint exhaust manifold spacer/riser setup. This closed-cooling (warm-riser) configuration is distinct from standard-cooling 3 in. dry-joint kits; verify the cooling system, joint style, spacer height, and original part reference before ordering.
Match the application
This kit applies to MerCruiser stern drive exhaust systems configured with a 3 in. (76 mm) spacer/riser on closed-cooling, dry-joint exhaust manifolds. It is not a universal fit across all MerCruiser V6 or V8 engines.
-
MerCruiser · Stern / Out Drive Exhaust Manifold System
For 3 in. (76 mm) spacer/riser installations on closed-cooling and dry-joint exhaust manifolds (associated with 3 in. warm-riser spacer/riser configurations).
Applies with the stated conditions
Numbers to compare
Compare your original kit reference and cooling configuration against the numbers below.
| Mercury / Mariner / Quicksilver OEM (Closed Cooling) | 864929A2, 864929A 2, 864929a 2 |
|---|---|
| Sierra Marine Reference (Closed Cooling) | 18-1844K |
| GLM Reference (Closed Cooling) | 50373 |
| Other Configuration Reference (Standard Cooling — Not This Kit) | Mercury Mariner 864929A1; GLM 50371 (listed separately for standard-cooling configurations) |
Technical details
| Product type | Exhaust manifold kit (spacer/riser service kit) |
|---|---|
| Brand | GH Marine |
| Spacer / Riser Size | 3 in. (76 mm) |
| Manifold Joint Type | Dry joint |
| Cooling System Configuration | Closed cooling (warm-riser spacer/riser setup) |
Supplied contents
- Exhaust Manifold Kit
Workshop sequence
General workshop guidance only; use the service procedure for your exact drive or engine configuration.
- Isolate the battery and cooling system, and drain the exhaust manifold and riser passages according to your engine service manual before disassembly.
- Verify that the existing manifold and riser assembly is a dry-joint, closed-cooling configuration with a 3 in. (76 mm) spacer height, and match the removed components against the new kit before installation.
- Clean and inspect all dry-joint mating surfaces, water passages, and surrounding exhaust hoses or connections prior to reassembly, following the factory service manual for fastener tightening sequences and routing.
Questions from the workshop
What is the difference between 864929A2 and 864929A1?
Both apply to 3 in. (76 mm) dry-joint exhaust manifold spacer/riser installations, but they serve different cooling setups. Mercury 864929A2 (GLM 50373 / Sierra 18-1844K) is for closed-cooling systems, while Mercury 864929A1 (GLM 50371) is listed separately for standard-cooling systems.
About GH Marine
GH Marine focuses on bellows and related marine service parts. Compare the application details, reference numbers and supplied contents together to select the part for your repair.
Delivery information
Estimated delivery: 7–15 calendar days.
Help with your order
For application questions, have your drive or engine identification and required part number ready.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.