yamaha being jerking and being sporadic

gobgolfcarts · 05-19-2017, 12:23 PM

ok guys I have a g29 Yamaha 07. The cart has a newer controller and batteries installed about 1 year ago. the problem I'm having is the cart will run sometimes but not all the time. when it does run, it jerks and runs sporadic. I thought for sure it was the throttle position sensor, but it wasn't. Then changed out the motor speed sensor and that didn't work either. Any ideas? I usually don't mess with Yamaha and don't have any manuals on them.

gobgolfcarts · 05-19-2017, 01:11 PM

I also noticed when it doesn't run, if I jack it up and spin the rear wheels at will start to run and kick on and off.

cgtech · 05-19-2017, 02:43 PM

Motor. Pull it & check the brushes & commutator.

gobgolfcarts · 04-21-2018, 01:01 PM

i know this is an old post but it did end up being the brushes in the motor. thank you

cardudenc · 06-06-2018, 06:19 PM

1 of our consignment customers has brought me her 2009 Yamaha cart. its doing something similar. sometimes runs fine, but I may walk out there right now put it in rev and it just jerk. like going in and out of gear. next time be fine. same goes for fwd. was hoping maybe something simple like the switch or a connection issue. I will try and pull the motor this weekend and check it. if it is the brushes are they replaceable or is it time for a new motor. this 1 looks to be a replacement.

TX_Paladin · 06-15-2018, 08:34 PM

I’m wondering the same thing. My 2012 Drive started jerking when accelerating from a stand still, as well putting out a grind or stutter when rolling slowly to a stop. This behavior began two weeks ago. Today, I drove it down the street, and power/speed seemed to be down about 75%. Then, after about a quarter mile it began jerking, stuttering and eventually stopped moving altogether. All the while, the digital battery gauge was jumping all over the place. Any thoughts?

Bracan75 · 10-09-2020, 10:59 AM

I have the same issue with my 2014. Anyone figure out what this is? Same symptoms as TX above

Bracan75 · 10-09-2020, 11:00 AM

Hello. I was wondering if you were able to diagnose the jerking/loss of power/slow grind you mentioned in a post. I am experiencing all those with my 2014 Yamaha electric cart.

camaroluvz28 · 10-09-2020, 11:20 AM

This sounds like a motor brush issue...an easy way to check is when it stops running...tap on the motor cap(end of motor) slightly with a hammer...then try to drive again...if it now moves whereas it didn't before points directly to brushes in motor...you can also try pressing accelerator down a little while rolling cart forward and if it then starts moving or trying to move that also points at motor brushes...and YES they are replaceable...

Orangie · 10-10-2020, 09:26 PM

I had a similar that I chanced for a while and it ended up being my brushes.

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05-19-2017, 12:23 PM	#1
gobgolfcarts Not Yet Wild Join Date: Sep 2016 Location: Jefferson City, TN Posts: 26	yamaha being jerking and being sporadic ok guys I have a g29 Yamaha 07. The cart has a newer controller and batteries installed about 1 year ago. the problem I'm having is the cart will run sometimes but not all the time. when it does run, it jerks and runs sporadic. I thought for sure it was the throttle position sensor, but it wasn't. Then changed out the motor speed sensor and that didn't work either. Any ideas? I usually don't mess with Yamaha and don't have any manuals on them.

05-19-2017, 01:11 PM	#2
gobgolfcarts Not Yet Wild Join Date: Sep 2016 Location: Jefferson City, TN Posts: 26	Re: yamaha being jerking and being sporadic I also noticed when it doesn't run, if I jack it up and spin the rear wheels at will start to run and kick on and off.

05-19-2017, 02:43 PM	#3
cgtech Over This Interview Is... Join Date: Jun 2012 Location: AZ Posts: 17,449	Re: yamaha being jerking and being sporadic Motor. Pull it & check the brushes & commutator.

04-21-2018, 01:01 PM	#4
gobgolfcarts Not Yet Wild Join Date: Sep 2016 Location: Jefferson City, TN Posts: 26	Re: yamaha being jerking and being sporadic i know this is an old post but it did end up being the brushes in the motor. thank you

06-06-2018, 06:19 PM	#5
cardudenc Not Yet Wild Join Date: May 2015 Posts: 31	Re: yamaha being jerking and being sporadic 1 of our consignment customers has brought me her 2009 Yamaha cart. its doing something similar. sometimes runs fine, but I may walk out there right now put it in rev and it just jerk. like going in and out of gear. next time be fine. same goes for fwd. was hoping maybe something simple like the switch or a connection issue. I will try and pull the motor this weekend and check it. if it is the brushes are they replaceable or is it time for a new motor. this 1 looks to be a replacement.
cardudenc Not Yet Wild Join Date: May 2015 Posts: 31

Today
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06-15-2018, 08:34 PM	#6
TX_Paladin Not Yet Wild Join Date: May 2016 Posts: 8	Re: yamaha being jerking and being sporadic I’m wondering the same thing. My 2012 Drive started jerking when accelerating from a stand still, as well putting out a grind or stutter when rolling slowly to a stop. This behavior began two weeks ago. Today, I drove it down the street, and power/speed seemed to be down about 75%. Then, after about a quarter mile it began jerking, stuttering and eventually stopped moving altogether. All the while, the digital battery gauge was jumping all over the place. Any thoughts?
TX_Paladin Not Yet Wild Join Date: May 2016 Posts: 8

10-09-2020, 10:59 AM	#7
Bracan75 Not Yet Wild Join Date: Dec 2019 Posts: 2	Re: yamaha being jerking and being sporadic I have the same issue with my 2014. Anyone figure out what this is? Same symptoms as TX above
Bracan75 Not Yet Wild Join Date: Dec 2019 Posts: 2

10-09-2020, 11:00 AM	#8
Bracan75 Not Yet Wild Join Date: Dec 2019 Posts: 2	Re: yamaha being jerking and being sporadic Hello. I was wondering if you were able to diagnose the jerking/loss of power/slow grind you mentioned in a post. I am experiencing all those with my 2014 Yamaha electric cart.
Bracan75 Not Yet Wild Join Date: Dec 2019 Posts: 2

10-09-2020, 11:20 AM	#9
camaroluvz28 Gone Wild Join Date: Sep 2010 Location: Florida Posts: 1,895	Re: yamaha being jerking and being sporadic This sounds like a motor brush issue...an easy way to check is when it stops running...tap on the motor cap(end of motor) slightly with a hammer...then try to drive again...if it now moves whereas it didn't before points directly to brushes in motor...you can also try pressing accelerator down a little while rolling cart forward and if it then starts moving or trying to move that also points at motor brushes...and YES they are replaceable...

10-10-2020, 09:26 PM	#10
Orangie Getting Wild Join Date: Apr 2020 Location: Wisconsin Posts: 82	Re: yamaha being jerking and being sporadic I had a similar that I chanced for a while and it ended up being my brushes. Sent from my iPhone using Tapatalk

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