Zenoah K117281150 Replacement Diaphragm for G-series Engines  [K117281150]

Durability and service notes for the K117281150 diaphragm

The K117281150 diaphragm is a replacement spare intended for use with Zenoah G-series RC engines. It is the rubber diaphragm element that meters fuel on the specified G200, G230, G231, G260 and G290 PU/PUH/PUM/RC engine variants and is supplied as an individual replacement component.

Verify your engine code before ordering so the part number matches your existing pump housing. The item includes only the diaphragm element; additional seals or fittings are not provided, so ensure your current pump components are serviceable before fitting the new diaphragm.

Fitment advice: follow your engine's service instructions to access the pump chamber, remove contaminants from sealing surfaces, and orient the diaphragm correctly to prevent pinching. Retain factory screws and gaskets where possible and tighten to recommended torque values to maintain an airtight seal.

Wear indicators and troubleshooting: regular inspection will catch hardening, cracking, or fuel bleeding that signal replacement is required. A failing diaphragm can trigger irregular idle or poor throttle response that is not fixable by carburetor adjustments alone.

Preventive care: clean the pump cavity periodically and replace the diaphragm promptly if you see deterioration. Using the exact K117281150 keeps pump behavior consistent with original specifications and avoids unintended performance changes from altered pump geometry.