Runaway seadoo?

[oct6454]

Hi

I had the so called "run away seadoo" happen to me for the second time today and i was wondering if this happens to all two strokes? And even when i pull the key it still wont shut off! Is this just apart of the problem of it becoming a run away while on the hose? I would just hate to have it happen to me on the water when i'm going all out and it wont stop!!!!!! lol

 

[timmyboy76]

Hi

I had the so called "run away seadoo" happen to me for the second time today and i was wondering if this happens to all two strokes?

Not all 2-strokes, but, can happen. Think its a condition of pulling air somewhere besides the arrestors on the carbs....if this does happen, pull the choke.

 

[oct6454]

There is the problem.

This ski does not have a choke. So can this happen on the water?

 

[seadoosnipe]

No, not on the water...

No, this is not likely to happen on the water. With the pump in the water, the torque will keep this from happening.

Timmyboy is correct. The likely reasons for this is an air leak. When it starts getting the additional air, it starts to lean out. Fuel will be sucked into the combustion area and heat up. When you try to kill it, the heat generated inside the chamber will continue combustion, sort of like the dieseling effect.

The only true way to stop this is by the choke. Starve the engine for air and cool it off using the fuel. Without the choke, you need to be very cautious when flushing on land. Don't use any throttle and only flush for a few seconds and shut down. If you wait for the motor's rpm to increase....it's too late. :cheers:

 

[oct6454]

So. . . how can i keep this from happening on the water? Where might this airleak be?

 

[seadoosnipe]

Not on water....

It's not going to happen to you on the water, as I explained above. When it's in the water, you have shaft torque. The runaway engine only happens on land, usually when flushing.

So, your good in the water.....:cheers:

 

[Chester]

The main causes are: air leak, stuck throttle/cable, bent throttle plate, or fuel restriction.
You say you don't have a choke so I assume you have a primer. When this happens, pump the primer. Another way is to pull the lanyard & then hold the throttle wide open.

Chester

 

[oct6454]

Ha, nope again no primer on this ski either. But most definantly will try the lanyard pull with wide open throttle next time.

 

[Chester]

What year & model is it? Is it fuel injected (RFI, DI)?

Chester

 

[Jimnut]

No choke or primer? How do you get the ski to start after its been sitting for a while?

Another way to kill the motor is to hold your hand over the exhaust port where it exits the back of the hull.