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Old 01-02-2013, 09:02 AM   #1 (permalink)
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583 flooding

Can't find a solution. Had flooding issues. Then cleaned carbs. Gas started coming out of fuel pump. Pulled pump off and realized the the crank is full of gas. Couldn't find drain plug so I pulled it with pump disconnected and gas line shut off. Put everything back together. Primed it and started right up. Rode for half hour. Run ok but can't let go of the throttle. To start again I need to hold throttle open. I don't understand why it's getting too much gas. Can the primer cause excess gas to enter if its faulty.


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Old 01-02-2013, 09:04 AM   #2 (permalink)
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Is there an easy way to drain crankcase?


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Old 01-02-2013, 02:04 PM   #3 (permalink)
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Yes the primer is often the culprit.
And no, there are no drain plugs on a rotax engine.

Try this next time you run it.
If you have a small set of vice grips, crimp off the primer line when you are running it and see if it starts easier when warm.
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Old 01-02-2013, 03:14 PM   #4 (permalink)
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Thank-you. I'll give it a shot.


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Old 01-02-2013, 05:40 PM   #5 (permalink)
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If that's not it, it may be the inlet needle/seat leaking by in the carbs.
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Old 01-02-2013, 06:17 PM   #6 (permalink)
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How can I tell if there is a needle/seat problem? Can I see wear and tear,or is there a way to test them. When I cleaned the carbs, they looked good. But I and not that experienced either.


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Old 01-03-2013, 03:49 AM   #7 (permalink)
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There is a pressure guage you use to test them. They should hold 5 lbs of pressure when flipped upside down indefinitely.
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Old 01-03-2013, 04:45 AM   #8 (permalink)
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Ok thx


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Old 01-06-2013, 07:17 PM   #9 (permalink)
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Tried clamping primer hose today. Still no idle but I can start it by holding the throttle open 1/4.


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Old 01-06-2013, 08:08 PM   #10 (permalink)
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I saw in a video that you can adjust needle by moving a clip up or down a notch. Is this worth trying?


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Old 01-07-2013, 06:21 AM   #11 (permalink)
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No. That only controls throttle response. Your pilot circuit controls idle. Is it leaking fuel when it sits?
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Old 01-07-2013, 09:16 AM   #12 (permalink)
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Not that I can tell. Should I just replace the jet needle and seat?


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Old 01-07-2013, 05:15 PM   #13 (permalink)
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Does your year of z have a manual fuel shutoff on r hand side under hood?Try shutting fuel off every time your done rideing.
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Old 01-07-2013, 06:48 PM   #14 (permalink)
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Yes. It has a shut off. Just started using it because the handle was broke. While riding yesterday. When I would go to restart when warm. I put a pencil between the throttle. And it'll start after 3 or 4 pulls. Even with shutting the gas off. I have to open the throttle to get it going. Runs fast. Just hard to start. Doesn't idle properly either.


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Old 01-07-2013, 08:26 PM   #15 (permalink)
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SEG. It looks like I was mistaking the jet needle from the needle/seat in the float bowl. Those parts can't be too expensive, so I'll replace them as soon as possible. Thank you for the info.


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Old 01-10-2013, 10:45 AM   #16 (permalink)
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Just found out the dealer cost for the needle/seat package is 47.99 each. Time for eBay.


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Old 01-19-2013, 04:36 PM   #17 (permalink)
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583 flooding

Latestrimer is ok. Needle seat sealing when closed. Floats not stuck. Starts no problem if I hold throttle open a bit.


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Old 01-19-2013, 04:59 PM   #18 (permalink)
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my 97 mxz 583 doese that a bit after riding for a while then try to restart warm i just give a bit of throttle on start then shes fine and will idle all day,,my old 521 rotax was a pain in the but to start i always had to give half to 3/4 throttle everytime day or night.
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Old 01-19-2013, 06:52 PM   #19 (permalink)
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583 flooding

Thx. Scram. I'll just live with it. It runs well otherwise. Just wish it ran like my 97 Indy. Purrs like a kitten. And a 7 year old could start it.


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Old 01-19-2013, 07:00 PM   #20 (permalink)
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yup 4 shure i havent even cleaned these carbs yet since i got it but i also notice some of my gaslines and vent lines are getting kinda hard so gonna replace those b4 they split,i also shut my fuel off when im done riding for the day just because. usually takes 1-2 primes and fires up
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