I was able to get a decent feel for whether or not one of the heads was completely blocked by pulling the t-stats and dumping water down each side.

Yamaha jet boat engine overheating. An engine that is overheating is being destroyed along with anything connected to it. Yamaha jet boats completely use water to cool everything along with the old school jet boats. Adequate stockholding of critical spare parts is essential in the marine industry.

Yamaha Warning Buzzer -- Overheating. Not even boats are immune. The boat is a 1 year old Yamaha SX210 - the right engine overheat warning came on and I shut the engine down and checked the intakes - no clogs.

Cooling water is supplied to the engines by the high pressure side of each jet pump. Unfortunately thats not necessarily the case with Jet boats. Checked under the boat and flushed the engine - could not duplicate the problem.

You are correct in your assumption that running the engines on the flush kits without getting an overheat warning means the problem is resolved. Adequate stockholding of critical spare parts is essential in the marine industry. After flushing first shut off the water and immediately after shut down the engine.

This means if a jet boat is not getting water the engine is not being cooled. Run the engine at fast idle for about 3 to 5 minutes. Ad China Chinese Boat Engine Supplier High Quality Competitive Price.

This will cause overheating whenever you operate the motor not just after flushing. If you have ever been out on the water and had an engine spewing steam from the engine compartment because it. Jet Boat Overheating - How To Install a 12V Electric Raw Water Pump Engine Temperature Gauge - YouTube.