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post #1 of 10 Old 12-06-2010, 11:10 PM Thread Starter
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stored 99 ZL 600 efi

Hello, just joined the site and posting my first quesiton.

My ZL has been stored the past few winters. It does not seem to be getting fuel, has good spark. Any suggestions where to start looking for the problem?

Thanks!
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post #2 of 10 Old 12-06-2010, 11:20 PM
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Sled: '99 ZL 600 EFI, '79 Yamaha Excel V
10-11 Mileage:
09-10 Mileage: 500 miles!!!
08-09 Mileage: too little (55)
How much gas does it have in it? How much did you leave in the tank when stored? Also did you put any additives in the fuel for storage, like seafoam?

Looking for a rear skid for my 99' ZL 600 EFI, looking at any skid at the moment as long as its a 121x15"
Need part # 0708-042 or 0708-096 BRKT,ENG MTG/BEARING SUPPORT-MACH pm me if you have one! Thanks!
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post #3 of 10 Old 12-06-2010, 11:34 PM Thread Starter
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Went into storage with a drained tank. Sled is stock and looks like brand new, ran like new when put away.
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post #4 of 10 Old 12-06-2010, 11:42 PM
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Sled: '99 ZL 600 EFI, '79 Yamaha Excel V
10-11 Mileage:
09-10 Mileage: 500 miles!!!
08-09 Mileage: too little (55)
So you drained it to nothing or left some? If you drained it to nothing you made a mistake, your fuel pump will probably need attention then. I think this would be your best bet in finding your problem.

Looking for a rear skid for my 99' ZL 600 EFI, looking at any skid at the moment as long as its a 121x15"
Need part # 0708-042 or 0708-096 BRKT,ENG MTG/BEARING SUPPORT-MACH pm me if you have one! Thanks!
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post #5 of 10 Old 12-07-2010, 12:19 AM
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Originally Posted by 301driver View Post
Went into storage with a drained tank. Sled is stock and looks like brand new, ran like new when put away.
That is most likely the problem since it is an EFI. EFI sleds should be stored with a full tank of fuel. The reason is that the electric fuel pump is inside the tank and with no fuel it "dries out" and doesn't want to get going again.
So, what to do?? Below is what I would do.

1. First,fill the tank with fresh gas and add a full can of Sea Foam (double dose).

2. Let it sit for a day.

3. Unplug the fuel pump wiring connector and hook it to a 12V battery. The wiring connector is under the plastic cover on the top of the tank that the steering post goes through. Remove the 2 screws and pull the cover off. The fuel pump connector goes into the top of the tank and has a black and red wire. Listen to see if you hear the pump running with the battery hooked up.

4. If you heard the pump run in step 3 then plug it back into the sled's wiring harness and give it a try at starting again.

Good luck
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post #6 of 10 Old 01-09-2014, 05:22 AM
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I've always drained the gas tank at the end of the season and left maybe a 1/2 gallon in the tank that's been treated with Stabil. Is Stabil or Seafoam better? It's never taken more than 2 pulls, 1 to prime and 1 to start the engine.

Thank you!
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post #7 of 10 Old 01-09-2014, 08:21 AM
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Even with a full tank storage the fuel pumps just get stuck after sitting sometimes. If you apply 12v to it directly it will move and then it will start normally. I had to do it to mine 2of 5 season start ups , no other issues.
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post #8 of 10 Old 01-10-2014, 01:24 AM
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Thank you greenasitgets!! Can you speak to whether or not there are any problems with leaving gas in the tank and the EFIs ever get gummed up from sitting even with Stabil or Seafoam?
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post #9 of 10 Old 01-10-2014, 06:03 AM
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Never had an issue with mine, but I like to start it up at least once a month for my two stroke fix.
Shop manuals state that storing with a full tank is the best practice.
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post #10 of 10 Old 01-10-2014, 08:20 AM
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I always use stabil on any stored gas tank, with modern ethanol blends you have to. The actual gas is pretty stable these days, you aren't likely to see any gum or varnish in only one season. The problem is the ethanol attracts water when it seperates. Stabil keeps the ethanol from percipitating.
You do want to fill the tank. First, less air in the tank to have moisture in it. Second, pump has metal components that can rust if not left submerged in gas.
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