The Cooling-System Flush Attachment

Guide

The cooling-system flush attachment

Difficulty: Beginner Time: ~5 min Applies to: Gas boards Last updated: Sep 2026

Watch the walkthrough

Watch on YouTube ↗ · JETSURF Official — "Petrol cleaning attachment tutorial". Timestamps below follow the video's own counter (0:06–0:26). This is the cooling-system flush step from Cleaning your board after a ride.

The cleaning attachment feeds a garden hose straight into the engine's cooling circuit. Use it every time you ride in salt water — it's the single most important part of the after-ride clean.

Steps

0:11 — Connect the cleaning attachment to a garden-hose connector.
0:15 — Push the attachment onto the cooling pin inside the impeller and lock it with the rubber ring.
0:18 — Turn the hose on and let the water flow into the board.
0:22 — Start the engine and let it run with the water flowing for at least two minutes.

Tip: engine on before you rely on it running dry, but the water can go on first here since it's feeding the cooling circuit directly. Keep the hose flow moderate — you want water out of the telltale about 30 cm high, not a flood.

Caution: don't run the engine dry for more than a few seconds — this whole procedure exists so it never has to. Two minutes minimum in salt water; skipping it is how the cooling system and exhaust corrode and block. See Blocked cooling system for what that leads to.

Written up by riders from the manufacturer walkthrough above and our own time with these boards — not official JETSURF documentation. Procedures, torque figures and service intervals vary by model and year: check your owner's manual, and if a job is beyond you, book it with a service centre. Work on your board at your own risk.

The cooling-system flush attachment