Mercury MerCruiser Quicksilver — Exhaust Manifold Screw — 8M0214937
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Mercury MerCruiser Quicksilver Exhaust Manifold Screw 8M0214937
Mercury MerCruiser Quicksilver 8M0214937 is a genuine OEM exhaust-manifold mounting screw used on a range of MerCruiser gasoline engines. It secures the exhaust manifold to the cylinder head and is the current Mercury replacement for earlier screw 53728.
Compatible Applications
- Select MerCruiser 2.5L GM 153 inline-four engines
- Select MerCruiser 3.0L and 3.0LX GM 181 inline-four engines
- Select MerCruiser 4.3L and 4.3LX GM 262 V6 engines
- Select MerCruiser 5.0L GM 305 V8 engines
- Select MerCruiser 5.7L GM 350 V8 engines
- Select MerCruiser 6.2L V8 engines
- Other GM-based MerCruiser gasoline engines whose OEM diagram specifies 8M0214937 or 53728
Serial-number fitment: Verify the engine serial number and exhaust-manifold diagram before ordering. Fastener quantity and location vary by engine generation and manifold design, and some assemblies combine screws with studs, washers, and nuts.
Part Details
- Current OEM part number: 8M0214937
- Mercury prefix reference: 10-8M0214937
- Brand: Mercury MerCruiser Quicksilver
- Product type: Exhaust-manifold mounting screw
- Thread: 3/8-16 UNC
- Nominal original length: 4.75 in. or approximately 120.7 mm
- Supersedes: 53728 and 10-53728
- Condition: New
Key Features
- Genuine OEM exhaust-manifold fastener
- Secures the exhaust manifold to the cylinder head
- Current functional replacement for earlier 53728 applications
- Used across multiple GM-based MerCruiser gasoline-engine families
When to Replace This Screw
Replace the screw if its threads are corroded, stretched, or damaged; the head is rounded; heavy corrosion is present; it was damaged during manifold removal; or the applicable service procedure requires replacement. Questionable hardware is best addressed while the exhaust manifold is already removed.
Installation Notes
Clean and inspect the cylinder-head threads before installation. Confirm the screw's exact diagram position because some MerCruiser configurations use a combination of screws and studs. Install the manifold with the specified gasket and associated hardware, then follow the torque value and tightening sequence for the exact engine model and serial number. Do not substitute a generic 3/8-16 bolt based only on thread size and length.
Technical FAQ
Is this a general-purpose 3/8-16 bolt?
No. It is an OEM exhaust-manifold mounting fastener used at specified positions in compatible MerCruiser assemblies.
Why must the diagram position be checked?
Some manifolds mix screws, studs, washers, and nuts rather than using identical screws at every mounting point.
Is there one torque value for every application?
No. Use the torque and tightening sequence specified for the exact engine model, manifold, and serial number.
Parts Desk Insights
Best use case: Replacing damaged or questionable exhaust-manifold hardware when the OEM diagram specifies 8M0214937 or superseded screw 53728.
Most common mistake: Ordering a generic bolt by thread and length without checking the manifold position. MerCruiser assemblies can mix bolts and studs in the same installation.
Fitment guidance: Confirm the engine serial number, diagram position, required quantity, associated washers or studs, and model-specific torque procedure before installation.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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