Jetski Tow Taps - Why you NEED them.

Tow taps can SAVE your Jetski’s life.

So what is a tow tap?

How do I go about getting one and what does it do?

Let’s have a look.

When you flush your jetski after using it, which of the following statements are true:

A.       I plug the hose in and start flushing it, then I turn the jetski on.

B.       I start the engine of the jetski, then I plug the hose in and start flushing it.

The answer is ofcourse B. We start the engine before we plug water in and begin flushing it. That is because we don’t want to force water back into the exhaust outlet and ultimately into the engine. Herein lies the utlity of the tow tap. When towing over 6 knots, it's crucial to prevent water from entering the engine's cooling system and we do this by getting a tow tap installed. Towing faster that 6 knots without a tap can lead to water intrusion, potentially causing significant engine damage.

The Role of a Tow Tap

A tow tap is a simple ball valve installed in the cooling line(s) of your jet ski. Activating this valve during towing stops water flow through the engine, preventing unwanted water ingress. Installation is straightforward and can be done by yourself; and the much needed help of YoutTube, or by any marine service tech. Notably, some Sea-Doo models from the late 2000s have red tape marking the ideal spot for tow tap installation and some Kawasaki’s actually need 2x tow taps.

Understanding Your Jet Ski's Cooling System

In standard operation, water is drawn into the jet pump to provide thrust and cool the engine. Even models with closed-loop systems; like certain newer Sea-Doos, utilize external water to cool the exhaust. As water circulates through the engine's cooling jackets, it absorbs heat, maintaining optimal temperatures. This water is then injected into the exhaust system to cool components like hoses and baffles. When the engine is running, exhaust gases expel this water efficiently.

The Risk During Towing

When a jet ski is towed, water continues to enter the jet pump and pressurize the cooling system, even though the engine isn't running. Without exhaust gases to expel it, water accumulates in the exhaust system and can eventually backflow into the engine, leading to potential damage. This scenario is similar to flushing your jet ski without the engine running, which is generally advised against.

Alternative Solutions

If a permanent tow tap isn't installed, carrying a hose pinching tool can serve as a temporary measure. By clamping the appropriate cooling hose during towing, you can achieve a similar effect. However, it's essential to familiarize yourself with your jet ski's cooling system to ensure you're pinching the correct hose.

Hot Tip for Young Players

I have almost been caught out here, so here’s a free rep for you. To avoid forgetting to reopen the tow tap after towing (a mistake that will almost certainly lead to engine overheating) I like to put my key lanyard around the tap when it's closed. This way, when you go to start the ski without the lanyard, you’ll know to grab it where the tow tap is, and you'll be reminded to reopen the valve.

Cost and Installation Time

In Queensland, the average cost of a tow tap is approximately AUD $40. Installation typically takes up to an hour, making it a cost-effective and time-efficient safeguard for your jet ski. Most marine techs will knock this job out for you on the same day, costing you somewhere between $150-$200.

Regular maintenance and timely repairs are ESSENTIAL to keep your jet ski in optimal condition. If you have questions about servicing or repairs, give your local marine techs a call or reach out to us and we will point you in the right direction.