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SKU:
ZZ3F09054
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Neutral Switch Shift 8M0052939 Fit Mercury CMD QSD 4.2 EI 270 320 350 814281A7
$101.19
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$101.19
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$101.19
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
Neutral Switch Shift for Mercury CMD QSD 4.2 EI 270 320 350
This neutral switch shift for Mercury CMD QSD 4.2 EI 270 320 350 monitors gear engagement for safe starting and shifting, with OEM cross-reference numbers 8M0052939 and 814281A7.
Overview
This neutral switch shift for Mercury CMD QSD 4.2 EI 270 320 350 is a precision electrical component that tells the engine control module whether the transmission is in neutral or gear. It supports safe engine start and prevents unexpected vessel movement. This neutral switch shift for Mercury CMD QSD 4.2 EI 270 320 350 is a direct replacement for worn or failed original parts.
Built For Performance
- Direct replacement for Mercury CMD QSD 4.2 EI diesel engines rated 270, 320, and 350 HP
- OEM cross-reference numbers 8M0052939 and 814281A7 ensure compatibility
- Marine-grade construction withstands saltwater and engine bay heat
- Reliable electrical contact for accurate neutral and gear signals
- Compact design fits original mounting locations
Fits These Machines
- for Mercury CMD QSD 4.2 EI 270
- for Mercury CMD QSD 4.2 EI 320
- for Mercury CMD QSD 4.2 EI 350
On-The-Job Use
- Replaces failed neutral switches during scheduled diesel engine servicing
- Used when diagnosing start-in-gear faults or shift interlock failures
- Installed in commercial and recreational vessels with Mercury QSD drivetrains
Specs At A Glance
| Part Number(s) | 8M0052939, 814281A7 |
| Compatibility | Mercury CMD QSD 4.2 EI 270, 320, 350 |
| Type | Neutral Switch Shift |
Good To Know
Q: Is this neutral switch compatible with my Mercury QSD 4.2 engine? A: Yes, this neutral switch shift is designed for Mercury CMD QSD 4.2 EI engines in 270, 320, and 350 horsepower ratings, matching OEM part numbers 8M0052939 and 814281A7.
Q: What are common symptoms of a failing neutral switch? A: Symptoms include the engine starting in gear, no start condition in neutral, or shift alarms. Replacing the switch with this part restores correct operation.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.