RedPart RP420F-P5 Engine 12HP - 15HP Replaces Honda GX390 1" (25.4mm) Parallel Shaft Recoil Start
- 12HP – 15HP / 420cc petrol engine
- 1" (25.4mm) parallel horizontal shaft
- Recoil start system
- Direct replacement for Honda GX390 Engine
- Loncin-powered heavy-duty engine
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- Free delivery on orders over £100
- 45‑day returns policy
The RedPart RP420F-P5 is a powerful petrol engine powered by Loncin based on the Loncin G420F, designed as a direct replacement for the Honda GX390 Engine. It delivers dependable performance for heavy-duty machinery applications, with recoil starting and low-maintenance operation.
Core Specifications
- Power Output: 12HP – 15HP (9.0–11.2 kW @ 3600 rpm)
- Displacement: 420 cc
- Shaft: 1" (25.4mm) parallel horizontal
- Starting System: recoil start
- Torque: 26.5 Nm @ 2500 rpm
Engine Details
- Bore × Stroke: 90 × 66 mm
- Compression Ratio: 8.3 : 1
- Idle Speed: 1450 ± 150 rpm
Fuel & Lubrication
- Oil Capacity: 1.1 L
- Fuel Consumption: 374 g/kWh
- Oil Consumption: 6.8 g/kWh
Features:
- Direct replacement for Honda GX390 Engine
- Heavy-duty industrial petrol engine
- Loncin-powered for reliable performance
- 1" (25.4mm) parallel shaft configuration
- Recoil start system

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