6-Inch MerCruiser Exhaust Spacer Kit for V6 and V8 Marine Engines
6-Inch MerCruiser Exhaust Spacer Kit for V6 and V8 Marine Engines is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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6-Inch MerCruiser Exhaust Spacer Kit for V6 and V8 Marine Engines
6-Inch MerCruiser Exhaust Spacer Kit for V6 and V8 Marine Engines is backordered and will ship as soon as it is back in stock.
Product Details
This 6-inch MerCruiser exhaust spacer kit raises the exhaust elbow by 6 inches on compatible MerCruiser V6 and V8 marine engines. It is intended for wet-joint exhaust systems, where cooling water passes between the exhaust manifold and elbow. The application described for this kit includes selected 4.3L, 5.0L, and 5.7L engines from approximately 1986–2001, as well as selected 7.4L and 8.2L big-block applications. Confirm the engine serial number, manifold, elbow, gasket arrangement, and bolt pattern before ordering.
This kit is listed as a replacement or cross-reference for Mercury/MerCruiser part numbers 93322A12 and 93322A3, GLM parts 50600 and 50610, and BARR part MC-20-93322A3. These references are provided for identification and should be verified against the original installation.
- Installs between the exhaust manifold and the riser or elbow.
- Designed for wet-joint exhaust systems where water passes through the manifold-to-elbow connection.
- Cast-iron spacer blocks provide a durable solution for compatible marine exhaust applications.
- Not intended for dry-joint exhaust systems with a different water-routing design or bolt pattern.
Part Number Matrix
Use these references to compare the kit with the part being replaced. A number match alone does not confirm compatibility; verify the complete exhaust configuration.
| Brand | Part Number |
|---|---|
| Mercury/MerCruiser | 93322A12 |
| Mercury/MerCruiser | 93322A3 |
| GLM | 50600 |
| GLM | 50610 |
| BARR | MC-20-93322A3 |
Engine and Model Compatibility
The following applications are the intended compatibility range for this style of wet-joint spacer. Confirm the exact engine serial number and exhaust components before installation.
The spacer configuration has also been associated with BARR manifold references MC-1-99798, MC-1-87114, and MC-1-89011 on compatible installations. These manifold references do not replace the need to check the complete system.
| Brand | Engine | Rated HP | Stroke | Years | Reference | Notes |
|---|---|---|---|---|---|---|
| MerCruiser | 4.3L V6 | 175–205 | 4-Stroke | 1986–2001 | 93322A12 | Wet-joint configuration; verify the applicable serial range and mating surfaces. |
| MerCruiser | 5.0L V8 | 200–320 | 4-Stroke | 1986–2001 | 93322A12 | Wet-joint configuration; verify the applicable serial range and mating surfaces. |
| MerCruiser | 5.7L V8 | 200–320 | 4-Stroke | 1986–2001 | 93322A12 | Wet-joint configuration; verify the applicable serial range and mating surfaces. |
| MerCruiser | 7.4L Big Block V8 | 330–370 | 4-Stroke | 1986–Present | 93322A12 | Selected wet-joint applications only; confirm the exhaust arrangement. |
| MerCruiser | 8.2L Big Block V8 | 380+ | 4-Stroke | 1986–Present | 93322A12 | Selected wet-joint applications only; confirm the exhaust arrangement. |
Technical Specifications
- Product Type
- Marine exhaust spacer kit
- Installation Location
- Between the exhaust manifold and riser or elbow
- Fuel Type
- Gasoline marine engines
- Exhaust Connection
- Wet joint; cooling water passes through the manifold-to-elbow connection
- Material
- Cast iron
- Finish
- Raw metal/unpainted
- Spacer Height
- 6 inches (152.4 mm)
- Connection Type
- Bolted connection
- System Type
- Wet-joint exhaust systems only
What's in the Box
- 2 x cast-iron spacer blocks
Gaskets, mounting bolts, and other installation hardware are not listed as included unless specifically supplied with the order.
Installation Notes
- Allow the engine to cool completely and disconnect the battery before beginning work.
- Drain water from the exhaust manifold as directed by the engine service manual.
- Unbolt and remove the exhaust elbow from the top of the manifold.
- Clean both mating surfaces thoroughly and remove all old gasket material.
- Install the correct new gasket, position the 6-inch spacer on the manifold, install a second correct gasket, and reinstall the elbow.
- Install the required longer mounting bolts and tighten them by hand first.
- Torque the bolts to the engine or exhaust manufacturer's specification using a crisscross pattern.
- Reconnect hoses and restore the cooling system according to the service manual.
- Reconnect the battery, run the engine, and carefully inspect the spacer joints for water or exhaust leaks.
Troubleshooting and FAQ
Will this kit fit my dry-joint MerCruiser engine?
No. This kit is intended for wet-joint exhaust systems. Dry-joint systems generally use a different water-routing arrangement, mating-surface design, and bolt pattern. Compare the original manifold and elbow before ordering.
How can I identify a wet-joint or dry-joint system?
Wet-joint systems pass cooling water through the manifold-to-elbow connection and commonly use a visible gasket at that joint. Dry-joint systems route water through a separate connector arrangement and use different mating surfaces. Check the engine serial number, service information, and physical configuration rather than relying on the year alone.
Does the kit include gaskets and mounting bolts?
The listed contents are two cast-iron spacer blocks. Gaskets and mounting bolts are not listed as included and may need to be purchased separately for the specific manifold and elbow combination.
What are common signs that a spacer, manifold, or gasket needs attention?
Possible warning signs include external water leakage at the gasket joint, water contamination in the engine oil, overheating, exhaust leakage, visible cracking, or corrosion. Stop using the engine and investigate any suspected internal water leak promptly.
Is this an OEM component?
This listing is for an aftermarket replacement kit. Confirm the dimensions, mating surfaces, and part references against the original equipment before installation.
What should I verify before ordering?
Verify that the engine uses a wet-joint exhaust system, then compare the original spacer height, manifold and elbow mating surfaces, bolt pattern, serial-number range, and required gasket and bolt arrangement.
Safety and Important Information
- Verify the engine model, year, serial number, exhaust configuration, and original part dimensions before purchase.
- Do not install this spacer on a dry-joint system or any application with a different mating-surface or bolt pattern.
- Use new, correct gaskets and installation hardware as required by the specific manifold and elbow combination.
- Follow the engine manufacturer's service procedures and torque specifications.
- Professional installation is recommended for safe and reliable marine-engine operation.
About Sea Sierra
- Pro-Grade Standards — We supply marine replacement parts selected for demanding real-world conditions.
- Global Fulfillment — Shipping options and delivery estimates are shown at checkout where available.
- Manufacturer-Direct Value — Practical replacement solutions with clear application information.
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