Tohatsu Nissan 20HP 4-Stroke Carburetor 3BJ-03133-0 MFS20C NSF20C Mercury Cross
3BJ-03133-0
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Carburetor Assy 3BJ-03133-0
Premium Replacement for Tohatsu & Nissan 20HP 4-Stroke
This high-precision Carburetor Assembly (EP) is engineered specifically for Tohatsu and Nissan 20HP 4-stroke outboard engines. As a critical component of your fuel system, this assembly ensures the correct air-fuel mixture for optimal combustion, smooth idling, and reliable power delivery across the RPM range. Designed to meet original equipment standards, it serves as a direct replacement for the 3BJ-03133-0 and the superseded 3BA-03133-0 numbers.
Key Features
- ✔ Direct Fit: Plug-and-play installation for MFS20C/NSF20C series.
- ✔ Electric Start Config: Specifically valved for "EP" (Electric/Remote) models.
- ✔ Precision Jetting: Pre-installed with #121 main jet for 20HP performance.
- ✔ Marine-Ready: High-grade materials built for harsh saltwater environments.
Technical Specs
| Engine Type | 4-Stroke |
| Horsepower | 20 HP |
| Main Jet | #121 |
| Slow Jet | #52 |
| Weight | Approx. 0.62 kg |
Compatibility / Fitment Guide
| Make/Brand | Model/Series | Notes |
|---|---|---|
| Tohatsu | MFS20C | 2008 - 2014 Models |
| Nissan Marine | NSF20C | 2009 & Newer |
| Mercury / Mariner | 20HP 4-Stroke (Japanese Built) | Check cross-ref numbers below |
OEM Cross Reference
| Tohatsu/Nissan | 3BJ-03133-0, 3BJ031330, 3BJ-03133-0M, 3BA-03133-0 |
| Mercury Marine | 3303-853720A22, 853720A17, 853720T15, 853720T17 |
Questions & Answers
Is this a genuine original part?
This is a premium quality replacement part designed to meet or exceed original equipment (OE) standards for Tohatsu/Nissan 4-stroke systems.
How do I know if it is compatible?
We recommend checking your existing part number. If it matches 3BJ-03133-0 or 3BA-03133-0, this is the correct unit for your 20HP engine.
What does the "EP" designation mean?
The "EP" suffix typically indicates the carburetor is configured for Electric Start and Remote Control models, where the linkage is set up for cable operation rather than a manual tiller handle.
Note: Please verify your engine's serial number or original part number against the references above before purchasing. This part is specifically for the 20HP model and may cause performance issues if installed on 15HP models due to the #121 main jet sizing.
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