yamaha waverunner wont restart when hot

[The motor guy]

Ok so I spent 800 dollars to have a shop clean out the carbs on my waverunner. That fixed the clogged jet that wouldn't let it go over 3500rpm, but now it's hard to start. Before it would start right up even with a clogged up carb. It takes about 12 tries to get it to start when cold and then if you run it for an hour or so and then let it sit for 20 minutes, it will be hard to start again.

 

[Warstud]

Easy Answer>>> Take it back and have them fix it. $800 WOW!

 

[spasm3]

Sounds like a fuel line vapor lock problem. Take it back.

 

[Dave Hess]

Take it back.

$800 ?

 

[Falken]

Vapor lock.

The valve on the fuel pump must be letting the fuel back into the gas tank wrecking the chance of a hot start.

 

[The motor guy]

so does that mean they didn't clean it right or does that mean there is a different problem that im going to have to spend more money on. It always started up nicely when the carbs were gummed up.

 

[The motor guy]

Originally Posted By: Falken
Vapor lock.

The valve on the fuel pump must be letting the fuel back into the gas tank wrecking the chance of a hot start.


so it needs a new fuel pump?

 

[Falken]

You have to have the fuel pressure tested.

I know how to do it on a car, but not on a Waverunner.

On a car you key cycle twice and see if it holds pressure for 20-30 mins on some cars.

Where there is fuel in the lines and the fuel rail, the heat of the engine doesn't create an air or "vapor" pocket.

On most modern cars the valve is incorporated into the fuel pump on most models.

If you can get a service manual for this thing you'd be all set!

 

[The motor guy]

I think iirc we had this problem when they had the idle set too low. Which is also another problem at the moment. It was set ok and then once I got to the dock I realized it was wanting to stall cause it was running too slow. I think it vibrates loose from the engine running.

 

[The motor guy]

Don't you guys think that they should have made sure it was running correctly before giving it back to me? Even if there is something else that may be wrong with it? I just don't want them to charge me anymore for diagnosing it again.

 

[Falken]

Yes you received very poor service from these guys.

I'd get a service manual from Yamaha and start leafing through it ASAP.

The PWC business must be full of hacks as it isn't really a mainstream business.

I bet if you get to know this little machine from your armchair you would find the thing is blazingly simple to keep humming along.

The way I see it, part of any motorsports hobby is fixing it yourself. Basically, if you have somewhere to store it, you most likely have somewhere to wrench on it too.

It would probably take a great amount of effort on your behalf to track down a great PWC repair center.