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Discussion Starter #1
I have had mine for a couple weeks now and really haven't had an opportunity to use much other than around the neighborhood, however I have noticed a pretty loud fuel pump whine at slow speeds and at idle. Do they all do this or is it just mine. It seems as if it is getting louder, or it is just me so tuned into it now. Any thoughts?
 

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I have noticed a whine in mine also. Really was not sure what it was but now that you have said something that may be where it's coming from. Figured when I take it in for its first service I'd have them check it out.
 

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Discussion Starter #3
I have noticed a whine in mine also. Really was not sure what it was but now that you have said something that may be where it's coming from. Figured when I take it in for its first service I'd have them check it out.
Thanks! I filled the gas tank all the way up to see if it would be any quieter, however it did not seem to affect the loudness. I was thinking that because the pump is in the tank, being fully surrounded by fuel would dampen the noise.. no such luck.. anybody else experiencing this pump whine??
 

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My ACE whines a bit too. I only hear it at idle because it's not very loud. I figured it was the nature of the beast.
I have no idea where the whine is coming from. I'll take a closer listen next time I'm working on it.
Maybe we should start a poll thread and see who else hears it?
 

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I also hear a whine in mine, but I hear it when I just turn the key to the on position. I also hear it when my Ace is just idling. I have not seen or heard any problems when I am trail riding. The noise is defiantly coming from under or behind the seat.
 

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Discussion Starter #6
It is my opinion as well that the noise is coming from under the seat, which is where the fuel pump is (in the fuel tank). The fuel pump runs for a second or 2 when you turn the key on to pressurize the fuel system. That noise is a lower pitch. Once started a higher pitch noise kicks in and stays. (which may still be the fuel pump running at higher RPMs). I can only hear it when at idle or slower engine RPMs. The engine noise drowns it out at higher engine RPMs.

Hopefully it is just the nature of the beast as Scoundrel said. I would be interested in hearing other machine to compare to mine. I may stop by a Dealer to see if I can listen to another one.
 

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I heard it in mine, and realized this is a fuel injected engine. When you turn on the key, it pumps up the system to the required fuel pressure, then when you start it, it doesn't come right back on until the pressure requirement or computer delay time is reached, then mine stays on after that. Is that what you folks hear?

Gas fuel injection is a bit different than the diesel fuel injection I work with every day, but they still have to get the fuel under pressure up to the injector so that it will be able to atomize it when called for. I suspect the pump is near the tank, or even in it like a car's fuel pump, and built into the pickup/float level assembly.

Does make some noise, doesn't it?
 

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My RZR has the same fuel pump setup, and it's only a little further away, and I don't hear that one whine.
But then again the RZR is louder than the ACE, and maybe they used a different fuel pump.
 

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I also hear it and it is definity coming from under the seat. Just figured it was a normal operation of the machine. My kawasaki did the same thing at idle but didn't really notice when riding. It's the same with the ace. I am not going to worry to much about it but will be watching this thread closely. The more people that hear it the more normal it is and the more comfortable we all will feel, so keep posting your sounds...
 

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Found it! It is in the fuel tank, and on the pickup and float level assembly. It is item one View attachment 554 in the picture. Polaris part number 2205374, KIT, fuel pump, (including pump, nut, seal). Makes sense, as the pump would get hot if it were outside of the tank. I also guess keeping a good amount of fuel in the tank to help cool the thing would help the longevity of it. Maybe they made it loud so we could hear it with helmets on!
 

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Discussion Starter #12 (Edited)
Yes. that's it!! Hard to tell if it is at a comparable level, but in your video it was definitely louder as you moved closer to the seat. Thanks for investigating! Makes me feel more comfortable that it is probably normal!
 
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Discussion Starter #15
Wow Thanks!! That's about the same for mine. Let's call it normal. You are the man Scoundrel!!
 

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You're welcome. That's what these forums are all about.

My dealer hates forums. Whenever I say the word, he makes a hissing noise. I guess maybe he got called on bullshit too many times. But it seems to me that forums also go a long way toward making dealers's jobs easier in some ways too.

Maybe it's a net negative for them, I dunno.
 

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Discussion Starter #17
where's the hissing noise coming from? Is it normal? Can you send a recording of it? :wink-new:
 

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Scoundrel...Do you know how many phone calls you just saved polaris dealers around the country? They should be kissing your a$$. Maybe some polaris dealers should check this site out every once in a while to learn about their product and how it preforms...
 

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My dealer hates forums. Whenever I say the word, he makes a hissing noise. I guess maybe he got called on bullshit too many times. But it seems to me that forums also go a long way toward making dealers's jobs easier in some ways too.
Maybe it's a net negative for them, I dunno.
In fairness, he does make a good point that a lot of misinformation and subjective information is spread on forums. But there's a lot of good stuff too. One just needs to exercise judgement in evaluating things that we are told by other forum users. Just like when we talk to dealers. :)
 
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