Neutral Switch Shift 8M0052939 Fit Mercury CMD QSD 2.8 EI 170 210 220 230
$101.19
Sale price
$101.19
Regular price
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SKU:
ZZ3F09055
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Neutral Switch Shift 8M0052939 Fit Mercury CMD QSD 2.8 EI 170 210 220 230
$101.19
In Stock
$101.19
Sale price
$101.19
Regular price
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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 2.8 EI
This neutral switch shift assembly, referencing OEM cross-reference 8M0052939, engages and disengages the starter circuit only when the outdrive is in neutral for safe engine start. It is designed for Mercury CMD QSD 2.8 EI engines in 170, 210, 220, and 230 horsepower ratings.
Overview
This neutral switch shift 8M0052939 is a direct-acting electrical safety component that prevents the engine from starting in gear. It serves marine diesel applications by interrupting the start signal unless the shift mechanism is confirmed neutral. This neutral switch shift is built for reliable operation in the harsh engine bay environment.
Built For Performance
- Replacement part number 8M0052939 ensures match to original specification.
- Rugged switch housing resists moisture and vibration.
- Precise contact alignment provides consistent signal integrity.
- Corrosion-resistant terminals maintain a secure electrical connection.
- Compact design fits within the existing shift linkage assembly.
Fits These Machines
- for Mercury CMD QSD 2.8 EI 170
- for Mercury CMD QSD 2.8 EI 210
- for Mercury CMD QSD 2.8 EI 220
- for Mercury CMD QSD 2.8 EI 230
On-The-Job Use
- Replace a failed neutral safety switch during routine engine maintenance.
- Install when troubleshooting intermittent starting failure in neutral.
- Use as a direct replacement for worn or corroded original components.
Specs At A Glance
| Part Number(s) | 8M0052939 |
| Type | Neutral switch shift |
| Compatible Engine Series | Mercury CMD QSD 2.8 EI |
| Horsepower Ratings | 170, 210, 220, 230 |
Good To Know
Q: How does this neutral switch shift prevent accidental starting? A: It opens the starter circuit unless the shift lever is in neutral, so the engine cannot crank while in forward or reverse gear.
Q: What are common signs of a failing neutral safety switch? A: The engine may not crank in neutral at all, or it may crank even when the shifter is in gear, both indicating a need for replacement.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.