Oleo-Mac GSH561 Genuine Walbro Carburetor 2318659R WT-1212 for EFCO MTH5800 MTH5600 GS56 GSH560 45CC 52CC 54.5cc 58CC Chainsaw
- Brand: Oleo-Mac
- Product Code: 1403056G*WT1212*2318659R
- SKU: 1403056G
- MPN: Walbro WT1212
- MPN: eMak 2318659R
- Availability: In Stock
- $46.68
$39.87
- Ex Tax: $39.87
Factory-Calibrated Fuel Precision — Maximize Cutting Power Across the Complete 45-58cc Range
Product Overview
Restore factory-fresh performance to your professional chainsaw fleet with this Genuine Walbro Carburetor (Part No. 2318659R / WT-1212). Engineered specifically for the Oleo-Mac GS56 GS560 GSH561 platform and compatible with EFCO MTH5800/MTH5600 series, this OEM-specification carburetor delivers optimized fuel metering for 45cc through 58cc 2-stroke engines. Whether you're running the compact GS56 or the powerhouse MTH5800, this Walbro WT-1212 ensures instant starts, crisp throttle response, and relentless torque through the toughest timber.
Key Features & Benefits:
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Genuine Walbro Quality: Manufactured by Walbro to exact OEM specifications – the same carburetor that came on your saw when new.
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Broad Compatibility: Engineered for multiple engine displacements across the Oleo-Mac and EFCO professional lines.
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Factory-Calibrated: Precision-tuned for optimal performance – no jetting guesswork required.
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Complete Assembly: Ready to install with all linkages, gaskets, and adjustments pre-set.
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Restored Performance: Eliminates bogging, surging, and hard start issues caused by worn carburetors.
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Commercial Durability: Built to withstand the vibration and temperature demands of professional forestry and arborist use.
Don't waste time with cheap aftermarket carburetors that never seem to tune correctly. Install the genuine Walbro WT-1212 and experience the reliability that only OEM precision can deliver.
Why Choose Genuine Walbro OEM?
| Feature | Benefit |
|---|---|
| WT-1212 Series Engineering | Proven diaphragm technology with enhanced fuel pump capacity for 45-58cc displacement range |
| Multi-Displacement Calibration | Factory-jetted to accommodate 45cc, 52cc, 54.5cc, and 58cc engine variants |
| Ethanol-Resistant Diaphragms | Advanced polymer construction withstands E10 fuel blends without degradation |
| Vibration-Dampened Design | Reinforced pump body eliminates fuel frothing in severe cutting conditions |
| Universal Linkage Compatibility | Direct fit for all listed models — zero modification required |
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Walbro (OEM Supplier for Oleo-Mac / EFCO / Yamabiko) |
| Part Numbers | 2318659R, WT-1212, 2318659 |
| Carburetor Series | WT-series diaphragm type |
| Venturi Diameter | 15mm (optimized for 45-58cc range) |
| Fuel Delivery | Single-pump, single-diaphragm system |
| Choke System | Manual choke with integrated primer bulb |
| Throttle Configuration | Dual-cable ready (throttle + safety interlock) |
| Fuel Inlet | 2.5mm barb (5/32" ID fuel line) |
| Air Filter Interface | 46mm screw-on mount |
| Idle Speed Range | 2,800-3,200 RPM |
Compatible Models by Displacement
| Displacement | Primary Models |
|---|---|
| 45cc | Oleo-Mac GS56, EFCO 145 |
| 52cc | Oleo-Mac GSH520, EFCO 152 |
| 54.5cc | Oleo-Mac GSH560, EFCO MTH5600 |
| 58cc | Oleo-Mac GSH561, EFCO MTH5800 |
Compatible Models:
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Oleo-Mac GSH561
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Oleo-Mac GS56
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EFCO MTH5800
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EFCO MTH5600
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Other 45-58cc chainsaws requiring WT-1212 carburetor
Engine Displacements: 45cc, 52cc, 54.5cc, 58cc
OEM Part Number: 2318659R / WT-1212
Complete Kit Contents
1 × Walbro WT-1212 carburetor body (pre-adjusted)
Professional Applications
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Commercial forestry felling
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Arborist precision pruning
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Firewood production operations
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Storm damage emergency response
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Orchard and vineyard maintenance
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Land clearing and site preparation
Installation & Calibration
Pre-Installation Checklist:
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Drain existing fuel and inspect fuel lines for cracks
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Clean intake manifold surface thoroughly
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Verify throttle cable free-play: 2-3mm at handle
Baseline Settings:
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H (High Speed): 1 turn out from seated
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L (Low Speed): 1.25 turns out from seated
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LA (Idle): Adjust for stable idle after warm-up
Break-In Protocol: Run 3 tanks of fuel at 75% max RPM before full-load operation.
Warranty & Authenticity
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Genuine Walbro OEM — Sourced through authorized Yamabiko distribution network
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Multi-Displacement Tested — Verified compatibility across 45-58cc engine range
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90-Day Performance Warranty — Replacement guarantee for material defects
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Factory Settings Preserved — Sealed adjustment screws prevent tampering during transit
The following pictures can tell you more than we can. What you see is what you will receive – nothing more & nothing less! Please make sure it can fit on your project before buying.

Tags: Oleo-Mac GSH561 Carburetor, Genuine Walbro WT-1212, OEM 2318659R, EFCO MTH5800 Carb, GSH560 Chainsaw, WT-1212 Chainsaw Carburetor
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