What Are The Symptoms Of A Bad RAVE Valve On SeaDoo 951?

The RAVE valves work on the pressure of the exhaust system. They basically raise the exhaust port allowing the engine to rev freely. Moreover, these valves supposedly give more power to bigger engines.

If a RAVE valve goes bad, you can tell by a few signs and symptoms. This article will briefly discuss this issue including some of the most important details.

What Sign You Should Look for to Detect a Bad SeaDoo 951 RAVE Valve?

Your watercraft can demonstrate unusual signs due to many reasons. It is unclear how it performs with a bad RAVE valve.

However, for a RAVE valve, the most specific sign of damage or clogging is running at high RPM while the engine seems to die out. Other times, it loses RPMs and slows down.

What Are the Symptoms of a Bad RAVE Valve On SeaDoo 951?

Symptoms of  a bad SeaDoo 951 RAVE valve are given below:

Less Power to the Engine

The height of the exhaust valve relative to the piston travel determines the power curve of the engine.

If the RAVE valve is damaged, the exhaust valve gets ‘lower’. Due to this, the engine tends to deliver power more at a lower RPM.

Contrary to this, the engine will deliver higher power at a higher RPM when the exhaust port is higher. That is when the valve is open.

So, it is very basic to lose RPMs when your RAVE valve’s a wreck.

With the RAVE valves unplugged, the revs become slower, although linear. They don’t seem to be getting high as they should be.

When plugged in, it takes some time to catch up to higher speed, say 5000 RPMs. But can suddenly jump to the highest RPM possible (6500+ RPMs). Speed increases when you throttle up and can run smoothly at a moderate speed.

RAVE Valves Sticking

If you take the cap off the RAVE valves and find oil under the diaphragm caps, that’s your culprit.

You may also see some carbon build-up on the valves. All kinds of dirt and oil mix and get the RAVE valve stuck.

Another sign of this is that you may hear unusual gurgling sounds coming from the valves.

If the RAVE valve is stuck shut, the watercraft would still get up to top RPM. However, the engine may look like it is falling off the power.

If the RAVE valve is stuck open, then you will face problems with the idle. It will feel stuck. It will also seem to be a little flat while in the mid-range.

Water Flow Check

An easy water flow check can tell you a lot about your RAVE valve.

It is simple. Take the SeaDoo 951 back in the water and start it up.

Now, detect the line that goes from the regulator to the pipe and unhook it.

Then, start increasing the RPMs. With a good RAVE valve, you should get a good rate of water flow at idle.

If the water flow is restricted, it may be time to check the RAVE valve.

RPM Test

Another test you can do is the RPM test.

First, take the caps and spring off the RAVE, and ride it. You should 6900 RPMs.

At that time from the side of the solenoid, take off the pulse line. And start the motor. A pulse of air should come out. But if you get a vacuum or get positive or negative pressures both, then check the RAVE valve.

How Should You React If You Detect a Bad SeaDoo 951 RAVE Valve?

If you have a case of a stuck RAVE valve, then you can try cleaning it.

Take the black-colored caps and the spring off the RAVE. Does the RAVE slider move up and down smoothly? Good.

Then pull out the RAVE by removing the Allen bolts. Clean the grease off after unscrewing the slider off and taking it out of the exhaust piston.

From the valve housing, take out the bellows by removing the spring off. Clean both of them.

Then check the o-ring on the slider shaft. If it is not soft, then remove it.

Buy a RAVE rebuild kit with the base gaskets and o-ring. The bellows should be intact and without any crack or tear. Turn the base properly to make sure the small RAVE port aligns with the opening on the base.

Make sure to clean the parts with a brush cleaner and a wire brush. These are very soft materials and can chew up easily so you better be careful.

Nevertheless, you should replace your RAVE valve if black residue starts leaking from it.

Is Replacing a Bad SeaDoo 951 RAVE Valve Typically Expensive?

A SeaDoo RAVE Valve Rebuild Repair Kit All 947 951 DI Models GTX RX XP LRV 3D costs $17.95. SBT sells a RAVE repair kit at $25 which is also recommended.

The SeaDoo 787 800 947 951 Power RAVE Valve Cap Spring Clip Repair Rebuild Kit costs $34.95.

You can clean easily rebuild your RAVE valves with these kits. So Replacing it is quite inexpensive.

You don’t usually require expert servicing for the RAVE. However, cleaning the RAVE is not enough often. In this case, you can take the engine for servicing.

Servicing an engine costs around $300-600.

But if you find someone who will help you with the RAVE specifically at a cheaper price, then go for it.

It is best to keep the RAVE health in check rather than destroying it completely.

How Often Should You Inspect or Service the SeaDoo 951 RAVE Valve?

Cleaning or inspecting the RAVE valves should be done every couple of months. Cleaning the RAVEs every 50 hours or at least once or twice every season is ideal.

To increase the longevity of the valves, the carburetors should be kept in proper condition. They should be adjusted to idle and run as smoothly as possible.

A good quality low ash oil should be used as the oil plays a huge role in ruining the RAVE valve.

Cleaner RAVEs require an efficient fuel to air ratio. However, it should be lean enough to not create excess carbon and unburnt fuel or oil. Keep the RAVE clean of this unburnt fuel that takes the form of black oil.

Final Thoughts

A RAVE valve powers an engine at high RPM. It indeed is valuable to your watercraft sailing.

A damaged RAVE can cost an entire engine servicing. You can save your precious money by heeding to the early signs of a clogged RAVE.

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