The Kyosho B0108-21 Water Jacket 38mm is a compact cooling sleeve made to improve motor thermal control in your RC Surfer 3. Its 38mm diameter is intended to fit around compatible motors and route water to absorb and remove heat during longer runs.
Operating in water places continuous load on the motor, and this water jacket helps transfer heat away to reduce thermal stress. It provides a simple cooling path without complicated plumbing and aims to keep motor temperatures stable.
Slide the jacket onto the motor so it sits snugly and secure any sealing surfaces to avoid leaks. Check the fit before each session and clear any debris that could block water flow to maintain efficient cooling.
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