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Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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09-11-2017, 02:35 PM | #1 |
Not Yet Wild
Join Date: Sep 2017
Location: Middlesex, NC
Posts: 17
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Timing off by approx. 90 degrees, How to adjust?
My 1983 G1 won't start. it just backfires at the exhaust side. I removed the fan cover to check the timing. The timing marks line up perfectly when the piston is at TDC.
However, when cranking it over with a timing light attached, my spark timing is off by approx. 90 degrees(5-6 inches around the fan's perimeter) How is this even possible? It's off by approx. the same amount in the opposite direction when I try to crank it in reverse. Has something moved or come loose behind the fan? How can I adjust the timing by this amount? Thanks in advance for any advice on this. |
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09-11-2017, 03:39 PM | #2 |
Not Yet Wild
Join Date: May 2016
Location: San Diego
Posts: 50
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Re: Timing off by approx. 90 degrees, How to adjust?
It sounds like you have you starter wires backwards to the solenoid. It's trying to start in the wrong direction.
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09-11-2017, 05:38 PM | #3 |
Not Yet Wild
Join Date: Sep 2017
Location: Middlesex, NC
Posts: 17
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Re: Timing off by approx. 90 degrees, How to adjust?
I have been doing more testing. I think I have found the problem. The orange wire on my ignition coil is grounded. I believe that means my ignition coil is bad. Why would it spark at all if the coil is bad though?
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09-11-2017, 06:26 PM | #4 |
Not Yet Wild
Join Date: May 2016
Location: San Diego
Posts: 50
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Re: Timing off by approx. 90 degrees, How to adjust?
Did you remove your starter/generator then it's post A1 and A2. The only reason I know is I put them backwards and it seemed like a timing problem
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09-11-2017, 06:58 PM | #5 |
Not Yet Wild
Join Date: Sep 2017
Location: Middlesex, NC
Posts: 17
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Re: Timing off by approx. 90 degrees, How to adjust?
I have not removed the starter/generator or any of the wires. My key is backwards though. forward is reverse and reverse is forward. Do I need to reverse the a1 and a2 wires? They are connected exactly as shown in the service manual.
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09-11-2017, 10:11 PM | #6 |
Gone Wild
Join Date: Jun 2015
Location: NW Iowa
Posts: 1,669
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Re: Timing off by approx. 90 degrees, How to adjust?
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09-11-2017, 10:13 PM | #7 |
Gone Wild
Join Date: Jun 2015
Location: NW Iowa
Posts: 1,669
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Re: Timing off by approx. 90 degrees, How to adjust?
I would start with this and see if you can't find where it's grounding and fix the wire rarely do these coils go bad
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09-11-2017, 11:11 PM | #8 |
Not Yet Wild
Join Date: Sep 2017
Location: Middlesex, NC
Posts: 17
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Re: Timing off by approx. 90 degrees, How to adjust?
I know the motor runs in both directions.
The ground is inside the coil I think. If I disconnect the orange wire between the coil and cdi box and put my ohmmeter red lead on the unplugged orange wire on the coil and touch the other lead to the motor, the frame, and the battery negative post, I have continuity at all 3. Doesn't that mean my coil is grounded within(bad)? |
09-12-2017, 04:03 AM | #9 |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: Timing off by approx. 90 degrees, How to adjust?
Have you tried the suggestion of making your engine run correct direction. That sounds like the problem has been described, but you have not addressed it yet. Don't say "it spins both directions", I know that part. Make F = forward & R = reverse. Just give it a shot. "Flipping" A1 & A2 OR F1 & F2 should do that.
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09-12-2017, 07:41 AM | #10 | |
Gone Wild
Join Date: Jun 2015
Location: NW Iowa
Posts: 1,669
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Re: Timing off by approx. 90 degrees, How to adjust?
Quote:
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