How do you test a Seadoo jet pump?

If you own a jet ski or are thinking of purchasing a new or secondhand personal watercraft you have to be aware of some of the common jet-ski problems and their fixes.This way you

How do you test a Seadoo jet pump?

If you own a jet ski or are thinking of purchasing a new or secondhand personal watercraft you have to be aware of some of the common jet-ski problems and their fixes.

This way you can save yourself time and money from having to visit a mechanic for something easy. Let's check out some problems I have encounter either on my own PWC or others out on the water.

The Way to repair your Jet skiyourself

Many problems happen out that's the last place you would wish to be repairing your watercraft and to the water. Ensure you have the following tools on hand in your Jetski's front storage compartment for crises.

  • Sharp lengthy knife
  • 3/8 Drive socket set
  • Shifter or wrench
  • Screwdriver
  • Torch
  • 40cm long metal bending rod
  • Tow rope and shackle
  • Suaoki Pocket Jump Starter
  • Anchor and rope
  • Water and spare life jacket.
  • Fire extinguisher

This is something I come across all the time while I am out riding at the river or lake. Many jet-ski owners think that it is ok to ride across a ski rope because they do not have an exposed propeller. This is totally wrong and can lead to significant damage to your PWC.

The intake grate to a Jet-ski was made to ingest large amounts of water in force. This has the capacity to suck in a rope in addition to other foreign material. What then happens is that the rope starts to get wrapped around the jet pump shaft until it stalls the motor.

A negative effect is that it could bend the shaft or harm the bottom jet pump hull. Never ride across a ski rope from the water or allow a rope go slack close to the rear of the Jet-Ski.

So how can you eliminate a rope or canning stuck in your intake grate?

Well, the only way is to tow the ski back to shore and place it on the trailer. After that you can use a knife to cut the rope away from around the shaft. If you still can't get to the rope you'll need to remove the three bolts holding the intake grate on. Then you will have more space to work in this area.

There would be A DIY alternative to use a pool noodle which has been cable attached to the ski rope's conclusion. This keeps it afloat and off from the pump intake .

Seaweed, plastic totes, and rocks will clog up your intake and attract you.

Jet-Ski Wont Start

Another jet-ski difficulty that is frequent is that in the start of the summer season a lot of Jet-Skis won't begin. This is usually because of a weak battery. There is only enough voltage from the battery but insufficient to provide a spark to ignite the gas.

The battery voltage drops so low that the ignition system will not fire up.

Top up your battery through the winter months with a smart charger tender and then again at the start of the summer season. This may keep your battery in peak charge which can slow down the desulfation process which all wet cell phones are prone too. Should you keep it fully charged, you will not have any problems with your battery.

Learning how to desulfate a battery ought to be high on every automobile and ship owner list of preventative maintenance.

They don't take a lot of room up and are light. Just wrap it up in plastic to keep out the rust.

Another problem can be loose battery cable links. This will cause a difficulty starting and charging your PWC -- clean Check, and tighten.

Engine misfires, and runs irregular

  • Sea-doo three cylinder 4-Tec motor
  • Fouled /faulty / worn spark plugs. -- Replace.
  • Water inside the sparkplug well, or about the ignition leads.
  • Fuel amount too low, older or water-contaminated. -- Siphon outside using a fuel pump and refill. -- Try using an injector cleaner and if still clogged replace them.

Hinge busted on Jet ski front storage compartment

Most personal watercraft will have a compartment to store fire extinguishers, safety gear, water bottles, and gear. What often occurs is people slam the lid shut and pack as much equipment in the front compartment.

Because of the angle of the hinge, this is often a weak place and the lid or the hinge will crack and break. Do not overload the front seat and if you do pack it completely close the lid slowly to be sure there isn't any added pressure with this lid.

The little glove box lid near the handlebars on some Sea-doo's can suffer the identical issue. Only package them 3/4 with gear and you won't have a problem.

You are able to repair a broken hinge by buying the replacement parts on the internet or trying to correct the hinge using a fiberglass repair kit.

Reverse door wont operate

Sea-doo IBR forward/reverse drop down gate.

Depending on Jet-ski's brand some inverse grates will be operated and a few will be operated with a cable.

Sea-Doo uses IBR which stands for smart brake reverse was known as by an auto-reverse operation system. On occasion the IBR reverse terrace can get jammed using a stone or a branch from a tree. Remove and try again.

You could have a blown power fuse, if your forwards reverse gate still won't move. Replace the fuse and try again.

  • At speeds below 8km/h (5MPH), yanking the iBR lever in will engage reverse.
  • At rates over 8km/h (5MPH), yanking the iBR lever in will engage the brake.
  • Yamaha includes so check for you or a gate could have a busted cable that is reverse.

Sea-Doo start key isn't being recognized.

D.E.S.S Start key plugged .

Sea-Doo uses a smart system to recognize that the owner is riding the jet-ski. So the PWC will not start, each key is programmed into this Sea-doo's memory. Its known as the

Digitally Encoded Security System or (D.E.S.S.) Don't even attempt to use your buddies key as this will not work.

When you place the key on the post of this Sea-Doo the craft won't recognize that key. Attempt to push against it harder as occasionally it could be on an angle.

Make sure if you are experiencing problems to dry them in case the key or the DESS article would be wet. I have yet to observe a Sea-doo start key neglect, but occasionally I see folks having D.E.S.S key article problems. This key post then needs to be replaced. Saltwater tends to corrode the internals.

If you do not want to visit a dealer and pay hundreds of dollars for a replacement D.E.S.S start crucial, you could always program on yourself. For this, you will need a Candoo Pro. These can also diagnose common problems in your Sea-doo, Kawasaki and Yamaha jet-skis.

Top speed not being achieved

Your PWC will probably be slower than usual. Examine the intake grate for ropes, rocks rubbish, and sometimes even . If the inlet greate is all apparent then check to find out whether you are using a learner key as this will restrict the RPM as well as the speed. Another problem might be that the speed mode might have been changed from sports/normal into ECO mode.

Impeller or A worn wear ring may cause cavitation and top end speed. Be certain if this is the cause to replace these. In the end, check the gate is fully in the position.

If all else fails your Jet-Ski could be in limp mode due to an engine sensor problem. An may put you. You will need to take your PWC to diagnose the precise problem.

Primarily you have to work out if your jet-ski is filling with water if conducting or if static sitting in water.

When it is filling with water whereas stationary use a torch and take the chair off. Often it's a seal on the shaft or there's a compression fitting onto a hose that will need tightening and is loose. Or someone forgot to put the drain bungs back in.

Its much harder to check for a water leak, under running conditions. The simple method is to keep the PWC on its own trailer and put it in the water. You have to reverse the whole trailer until the bottom of the intake grate in beneath water. Leave the chair off and start up the Jet-ski. Look where the water is arriving in to see. Often it'll be from the cooling circuit or the pump seal.

As it could increase 13, never utilize a PWC and fill your hull with water. If it happens your craft will start to sink and the motor will fill with water. The Sea-doo RPX was saved by getting return into the boat ramp.

Spark plugs difficult to remove

If a Jet-ski hasn't yet been serviced in a couple of years it may be challenging to remove the spark plugs. This is only because the plugs can be caused by rust to bind into the motor head. Utilize some fluid and leave.

Try and get rid of the plugs using the socket and a long extension bar. If the plug breaks the plug can be removed by you with an easy out extraction tool. Be sure to check to make sure no particles fell inside.

On replacing the spark plugs use a small amount of not seize to make them simple to remove next time. Torque them up into the spark plug's specifications. Spark plugs that are seized are a common Jet Ski difficulty because of the environment they are employed in.

Mold and Mildew on the seat and in the engine bay.

Mold inside a Yamaha FX Engine bay

If you do not allow out your Sea-Doo, Yamaha, or Kawasaki Jet-Ski atmosphere after every use you will start to draw mold and within your engine bay.

This mold fungus is challenging unless you use a toilet mold remover, to eliminate. Spray it on and let it go to work. Make sure to wash the area with fresh water following treatment.

Drain any water within the watercraft and one way to guarantee that mildew and the mold doesn't return would be to eliminate your PWC seat. I go as far as to sponge out any water which may pool in hard to reach areas.


Hopefully, a number of the problems and fix ideas will assist you in receiving your PWC back in the water quickly. 9 times out of 10 it is a fix which you can do yourself.

If you are looking to buy your initial PWC or trying to buy another then have a look at our article on what to look for while buying a secondhand Jet-Ski. It's full of specialized checks that you perform to be certain you don't get a lemon.

Having the tools on hand will make the job simple. You don't have to bring the entire workshop with you. But every watercraft should have the basic tools I said at the start of the report.

Ride safe and let me know in the comments below the way you have fixed it yourself and what problems you have with your Jet-ski.

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