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Old 06-25-2020, 09:28 PM   #1
TD-Bryan
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Taylor-Dunn
 
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Location: Arizona
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Question Taylor-Dunn no start

I need some help from the gurus out there.

I have what appears to be a 1996 Taylor-Dunn FT-016-40 yamaha gas powered 6 passenger "tram"

My problem is even though I have spark, the valves are adjusted, what looks to be a new ignition module, newer aftermarket carb, it just won't pop over..

It will act like it wants to start but not quite catch. The air box is as sealed as I can get it and it acts the exact same way when I shoot carb cleaner into it.

The plug when I remove it is covered in carbon and dry (sometimes hot if I crank it long enough). The engine also has decent compression.

I feel like I'm overlooking something and can't quite put my finger on it. Is it possible this machine has adjustable timing? If it does how do I check and adjust it.

Thank you in advance for all your help
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Old 06-26-2020, 11:19 AM   #2
TD-Bryan
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Taylor-Dunn
 
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Default Re: Taylor-Dunn no start

I found that the engine wiring diagram for a yamaha g9-a looks very similar to what is on the cart.

A previous owner was into the wiring and I'm going to use the schematic as a guide to double check everything.

Will the ignitor being wired improperly cause my issues?

I'll update if something changes
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Old 06-27-2020, 03:34 PM   #3
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Taylor-Dunn
 
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Default Re: Taylor-Dunn no start

I may have found it, or at least one of the issues.

The primary coil winding is only showing between 1.6 ~ 1.8 ohms of resistance. The G9 service manual states 3.57 ~ 4.83 ohms of resistance..


The secondary winding in the coil shows 10.13 ohms whereas the manual states 11.2 ~ 15.2 ohms as spec.

This leads me to believe that while i show spark when i pull the plug, it is most probably weak and possibly intermittent under real starting conditions.

I'm also thinking that the low resistance may also causing the "pre-ignition" resulting in the popping back through the carb..
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Old 07-06-2020, 10:32 PM   #4
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Taylor-Dunn
 
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Default Re: Taylor-Dunn no start

I figured it out.

A previous owner was into the wiring harness and when they repaired the leads from the pickup coil to the CDI they reversed the white/red and the white/black. Once I fixed this the cart fired right up..

Tomorrow I have to reattach the coil, recheck the valves and maybe adjust the carb a little to get her all fine tuned.
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Old 08-14-2020, 07:15 AM   #5
Divedigger
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Default Re: Taylor-Dunn no start

Hey TD , I'm looking at a Taylor Dunn right now that has sat for a while , overall are the parts standard or property to Taylor Dunn? Any other thought on them would be appreacited also. One other thing if it has a metal cab is everything else fiberglass ? 2002 yr Thanks divedigger
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Old 08-21-2020, 09:42 PM   #6
TD-Bryan
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Default Re: Taylor-Dunn no start

Quote:
Originally Posted by Divedigger View Post
Hey TD , I'm looking at a Taylor Dunn right now that has sat for a while , overall are the parts standard or property to Taylor Dunn? Any other thought on them would be appreacited also. One other thing if it has a metal cab is everything else fiberglass ? 2002 yr Thanks divedigger
My Taylor-Dunn has a factory yamaha drive train.. I was told by one of the local places here that Yamaha did buy Taylor-Dunn a while back. Finding parts hasn't been too much of a problem. First thing to do is figure out what exactly it is.
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