25AX Heatsink Head Upgrade - OS22514000 for O.S. Engine  [OS22514000]

O.S. ENGINES HEATSINK HEAD 25AX
Price:
CAD$14.46
Brand:
O.S. Engine
Model:
OS22514000
GTIN:
4531028144521
Condition:
Brand New
Write a review

25AX Cylinder Heatsink Head

This finned heatsink head is a cylinder head replacement designed for the O.S. Engine 25AX family. Its blade-style fins pull heat away from the combustion chamber to help keep running temperatures more stable during sessions.

For users experienced with RC glow motors: remove the original head, ensure mating surfaces are clean, inspect or replace the head gasket as needed, and tighten the head evenly to create a proper seal. Do not overtighten; verify the head is seated flat before final torque.

Though passive in function, the heatsink head improves heat dispersion and can reduce thermal drift when adjusting needles or running high RPMs. Regular inspection of the head and sealing surfaces helps preserve consistent performance.

Which engines will accept this heatsink head?

This part is intended for the 25AX series and will fit compatible 25AX RC glow engines when the head mounting pattern matches.

Will it affect my needle settings?

By reducing temperature fluctuations the head can make needle adjustments less sensitive to thermal drift, but core jetting and tuning practice remain the same.

Any tips to avoid installation problems?

Clean the mating faces, check or replace the gasket, tighten evenly in stages, and confirm the head sits flat before running to prevent sealing issues.

Copyright © 2008-2026 rcjaz.ca All rights reserved