6" Mercruiser Spacer Kit – Fits V6 & V8 Marine Engines (Replaces 93322A12, 20985)
6" Mercruiser Spacer Kit – Fits V6 & V8 Marine Engines (Replaces 93322A12, 20985) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
6" Mercruiser Spacer Kit – Fits V6 & V8 Marine Engines (Re...
Product Details
This 6" Mercruiser Spacer Kit raises the exhaust elbow by 6 inches on Mercruiser V6 and V8 marine engines. It is designed specifically for "wet joint" exhaust systems, typically used on models from 1986–2001 (4.3L, 5.0L, 5.7L) and from 1986 to the present on big block engines (7.4L, 8.2L). It is not compatible with newer "dry joint" systems.
This kit serves as a direct replacement for Mercury/Mercruiser parts 93322A12 and 93322A3; GLM parts 50600 and 50610; BARR part MC-20-93322A3; and Mercruiser part HOT20985.
- Installs between the exhaust manifold and the riser/elbow.
- Engineered for wet joint systems where water passes between the manifold and elbow.
- Constructed from heavy-duty cast iron for durability in marine environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury/Mercruiser | 93322A12 |
| Mercury/Mercruiser | 93322A3 |
| Mercruiser | HOT20985 |
| GLM | 50600 |
| GLM | 50610 |
| BARR | MC-20-93322A3 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This part is verified to work with BARR manifold part numbers MC-1-99798, MC-1-87114, and MC-1-89011 on compatible engines.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercruiser | 4.3L | 175–205 | 4-Stroke | 1986–2001 | 93322A12 | For wet joint systems with serial #0M614999 & below |
| Mercruiser | 5.0L | 200–320 | 4-Stroke | 1986–2001 | 93322A12 | For wet joint systems with serial #0M599999 & below |
| Mercruiser | 5.7L | 200–320 | 4-Stroke | 1986–2001 | 93322A12 | For wet joint systems with serial #0M599999 & below |
| Mercruiser | 7.4L (Big Block) | 330–370 | 4-Stroke | 1986–Present | 93322A12 | For wet joint systems |
| Mercruiser | 8.2L (Big Block) | 380+ | 4-Stroke | 1986–Present | 93322A12 | For wet joint systems |
Technical Specs
- Product Type
- Marine Exhaust Spacer Kit
- Installation
- Between exhaust manifold and elbow
- Fuel Type
- Gasoline
- Connection
- "Wet Joint" (passes water between manifold and elbow)
- Housing Material
- Cast Iron
- Housing Color
- Raw Metal/Unpainted
- Dimensions
- 6" (152.4 mm) height
- Weight
- 30 lbs (13.6 kg)
- Fitting Type
- Bolted connection
- Warranty
- 3 years (manufacturer's warranty)
- Other Technical Attributes
- For "wet joint" exhaust systems only
What’s in the Box
- 2 x Spacer Block (Cast Iron)
Installation Notes
- Ensure the engine is completely cool and disconnect the battery for safety.
- Drain water from the exhaust manifold according to your engine service manual.
- Carefully unbolt and remove the exhaust elbow from the top of the manifold.
- Thoroughly clean both the manifold and elbow mating surfaces, removing all old gasket material.
- Place a new gasket on the manifold, position the 6" spacer on top, place another new gasket on the spacer, and then reinstall the elbow.
- Insert and hand-tighten the new, longer mounting bolts.
- Torque the bolts to the manufacturer's recommended specification in a crisscross pattern.
- Reconnect any hoses, refill the cooling system, and reconnect the battery.
- Start the engine and carefully check for any water or exhaust leaks around the new spacers.
Troubleshooting & FAQ
Will this kit fit my "dry joint" Mercruiser engine?
No. This spacer kit is specifically for "wet joint" exhaust systems only. It will not fit "dry joint" manifolds, which typically have serial numbers beginning with OM, such as OM0XXXXXXX.
How can I tell if my system is "wet joint" or "dry joint"?
Wet joint systems, common from 1986 to the early 2000s, have a visible gasket and pass water between the manifold and elbow through openings in the mating surfaces. Dry joint systems (early 2000s to present) use a U-shaped connector pipe for water and have blocked-off mating surfaces with a different bolt pattern. Always check your serial number and visual configuration.
Does this kit include gaskets and mounting bolts?
This kit includes the two cast iron spacer blocks. Please refer to the "What’s in the Box" section for a complete list of included items. Gaskets and bolts are typically sold separately to ensure you get the correct hardware for your specific manifold and elbow combination.
What are the signs my existing spacers or manifold need replacement?
Common signs of failure include water leaking externally from the gasket joints, water in the engine oil (indicating an internal leak), overheating, or visible cracks and corrosion on the cast iron components. Regular inspection is recommended, especially in saltwater environments.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 3-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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