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what is that sqeal sound??

Posted: Sun Aug 02, 2009 7:18 pm
by toofast34
My nq50 runs good and strong,however there is this sqeal sound coming from the flywheel side of the engine.The sqeal sound changes as the RPM's change when idling it will almost go away but then I accelerate and she starts to sqeal.Is this the main bearings telling me something.I took the flywheel off and sprayed the stator with contact cleaner and the noise went away for a day but is back again.any clue??

Re: what is that sqeal sound??

Posted: Sun Aug 02, 2009 7:54 pm
by SpyderMike
did you clean the fan? sometimes fans make a wierd noise too

Re: what is that sqeal sound??

Posted: Sun Aug 02, 2009 8:53 pm
by toofast34
fan is clean.

Re: what is that sqeal sound??

Posted: Sun Aug 02, 2009 11:10 pm
by Bear45-70
Squeal from that area is usually a belt starting to go.

Re: what is that sqeal sound??

Posted: Mon Aug 03, 2009 9:38 am
by toofast34
I thought it was the belt at first,but the sqeal comes from the otherside of the engine not the belt side.I even took out my stethescope to have a listen and the noise is coming from the flywheel side.I measured the width of the belt and it is still within spec.help.

Re: what is that sqeal sound??

Posted: Mon Aug 03, 2009 5:18 pm
by Bear45-70
toofast34 wrote:I thought it was the belt at first,but the sqeal comes from the otherside of the engine not the belt side.I even took out my stethescope to have a listen and the noise is coming from the flywheel side.I measured the width of the belt and it is still within spec.help.
Then you have something rubbing under the shroud or the flywheel. Taking it apart is the only way to find it. Whatever is rubbing will leave marks.

Re: what is that sqeal sound??

Posted: Tue Aug 04, 2009 12:08 am
by toofast34
this sqeal sound comes and goes.It's weird it sounds like a zinging sound like when you have interference on your car radio.The pitch of the zing changes when I rev her up.When I sit at a light long enough the sound will go away,but soon as I blip the throttle she is back to making this high pitch zinging sound.It only makes this noise when she warms up.could it be a leaking base gasket?I'm confused please help.

Squealing Spree

Posted: Tue Aug 04, 2009 12:18 am
by Wheelman-111
Greetings:

Perhaps a family of field mice has taken up residence in your alternator? The Bear gave you good advice if you're sure the noise is from that side.

My Aero had a zingy ringy sound when its first belt was worn down to 14mm. It's the same timbre as the steel drive face.

Re: what is that sqeal sound??

Posted: Tue Aug 04, 2009 12:24 am
by SpyderMike
Bear45-70 wrote:
toofast34 wrote:I thought it was the belt at first,but the sqeal comes from the otherside of the engine not the belt side.I even took out my stethescope to have a listen and the noise is coming from the flywheel side.I measured the width of the belt and it is still within spec.help.
Then you have something rubbing under the shroud or the flywheel. Taking it apart is the only way to find it. Whatever is rubbing will leave marks.
i agree w/ that :mrgreen:

Re: what is that sqeal sound??

Posted: Tue Aug 04, 2009 8:16 am
by Lunytune
Perhaps a family of field mice has taken up residence in your alternator?
We need to call in Mousewheels for this one. He's experienced with mice in the scoot. :?

I would suggest pulling one cover or shroud at a time. When the squeal goes away, you've found the culprit. Geesh, I hope you get to it before going all the way to the bearings.

Re: what is that sqeal sound??

Posted: Tue Aug 04, 2009 11:22 am
by toofast34
it is definetly NOT mice.I did however put a good used ststor and pulsar on that I picked up from Badthree.however the noise didn't start till after a few days later.like I said it is not down on power.Just this stupid sqeal thats driving me bonkers.I took the shroud off and the noise is still there.As the machine was running and making this stupid noise I sprayed some contact cleaner in behind the flywheel and instantly the noise went away ,but minutes later it returned.HELP

Re: what is that sqeal sound??

Posted: Tue Aug 04, 2009 11:59 am
by mousewheels
I took the shroud off and the noise is still there.As the machine was running and making this stupid noise I sprayed some contact cleaner in behind the flywheel and instantly the noise went away ,but minutes later it returned.HELP
mousewheels: <squeak> since you replaced the stator, might as well pull the flywheel again and have a look in there for contact. I've done a few stator only changes w/o problems. But know at least one Honda scooter manual says to replace the stator and flywheel as a set. Anyone been bit by not replacing as a pair?

Re: what is that sqeal sound??

Posted: Tue Aug 04, 2009 12:16 pm
by Wheelman-111
Greetings:

It's frighteningly easy to misalign the little half-moon sliver of metal known as the Woodruff Key. Even easier to fail to notice its absence from the shaft. You may find its ground-up remains adhering to the rare earth magnets of the flywheel.

Either way, the flywheel goes wonky on the shaft, causing all kinds of contact problems. Pop it off and check. I'm 83.2% sure you will find your squeak source.

Re: what is that sqeal sound??

Posted: Tue Aug 04, 2009 9:07 pm
by toofast34
83.3% sure...that's some odds.I will pop the flywheel off and check it out.She sure ran great today minus the sqeal sound.

Re: what is that sqeal sound??

Posted: Wed Aug 05, 2009 9:03 am
by Lunytune
83.3% sure...that's some odds.
His SD is questionable. I happen to know his study group included a Briggs and Stratton lawnmower. :mrgreen: