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Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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07-20-2016, 01:59 PM | #1 |
Gone Wild
Join Date: Jun 2012
Location: Spicewood, TX
Posts: 219
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My Buddy's G1 is HAUNTED !
My friend asked me to work on his G1 to see if I could figure out why the battery keeps going dead. He has a new adjustable VR. First of all the Negative fuse was blown, so I replaced it.
After jacking it up, and putting it on jack stands, I disconnected the black/white connection so I could keep it running and check out the voltage. The idle was way too high, so I adjusted it down to a close proximity of the correct spec. While getting ready to measure the voltage coming from the VR, the cart accelerated to almost WOT. I watched and listened and after a few seconds it decelerated back to idle. I went back to removing the cover from the VR, and it accelerated again to WOT. I watched closely, and the throttle linkage did NOT move. That's right ... no additional fuel/air was added, but it was accelerating anyway. WTH!? I'll get back to the VR after I figure out how an engine can accelerate with no fuel/air changes. Any ideas what may be happening? Thanks for ANY ideas, Ogre |
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07-20-2016, 07:03 PM | #2 |
Gone Wild
Join Date: Apr 2013
Location: Eastern SD.
Posts: 276
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Re: My Buddy's G1 is HAUNTED !
I'd be looking for an air leak in the intake system or shaft seals. With no load on the drive system it doesn't take much to cause a drastic change in RPM's.
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07-21-2016, 04:15 AM | #3 |
Crazy Ole Man
Join Date: Jan 2016
Location: Owego NY
Posts: 2,758
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Re: My Buddy's G1 is HAUNTED !
The crankshaft seals are gone. I had the same thing happen to me with an old snowmobile engine. Pulling the spark plug wire off at 5-6000 rpm is not fun.
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