STIHL Fuel Pump - 4238 350 6201

Key Features

• Direct OEM replacement calibrated for 2-stroke carbureted platforms
• Maintains precise vacuum and positive-pressure cycles for consistent fuel metering
• Constructed with chemical-resistant elastomer diaphragms to resist degradation from ethanol-blended fuels
• Precision-machined mounting rails align with original crankcase deck tolerances
• Integrated impulse channel routing eliminates external leak paths and flash-back risks

Product Details

This unit functions as a factory-specification fuel transfer assembly engineered specifically for handheld 2-stroke power equipment. The internal impulse lines and rubber diaphragm geometry correspond exactly to the original casting specifications, maintaining calibrated vacuum and pressure cycles across standard operating temperatures. Material composition utilizes chemical-resistant elastomer for the pumping membrane alongside reinforced polymer housings to prevent case deformation under sustained vibration. All mounting interfaces, port geometries, and crankcase sealing surfaces are manufactured to match original deck specifications, eliminating the need for adapter plates or post-installation tuning.

Compatibility

Designed for direct interchange on legacy and current platform configurations when retaining the original intake manifold and carburetor setup. Fits the following STIHL tool families:

• Chainsaws: MS 170, MS 180, MS 181, MS 192, MS 194, MS 200, MS 201, MS 230, MS 250
• Brushcutters & String Trimmers: FS 38, FS 40, FS 50, FS 56, KM 55 R, KM 56
• Hedge Trimmers: HL 36, HL 42, HL 46, HL 52, HL 56
• Backpack Blowers: BF 35, BG 35, B 55