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Old 10-31-2017, 07:12 PM   #1
ShawnQ
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Join Date: Jul 2016
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Default G2 intermittently won't start, cranks but no fire. Runs great when running

My G2 has been having an intermittent problem where it will run great and then just die. It will crank and crank and never fire.

It has fuel, and when I checked for spark I saw spark...but have no way to gauge if it's enough spark.

All filters, carb, and pump are new. Fuel is not the problem.
Spark plug is new.


When it's running, it runs great.

I'm assuming intermittent coil, cdi/igniter, or wiring issue.

Is there a sequence recommended in checking these? What's the best way to diagnose this?

Thanks

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Old 10-31-2017, 07:36 PM   #2
justwondering
A Gal with a Cart!
Yamaha
 
Join Date: Aug 2015
Location: Northeast in the Republic of Texas
Posts: 462
Default Re: G2 intermittently won't start, cranks but no fire. Runs great when running

I'm assuming you made sure your starter/generator belt was tight and that the tensioner bolts are tight?
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Old 10-31-2017, 07:48 PM   #3
justwondering
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Yamaha
 
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Location: Northeast in the Republic of Texas
Posts: 462
Default Re: G2 intermittently won't start, cranks but no fire. Runs great when running

Sorry for the delay, I was looking for the thread I used to help me:

http://www.buggiesgonewild.com/gas-y...n-nothing.html

Gives you some testing procedures
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Old 10-31-2017, 09:06 PM   #4
Spicyunicorn
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Yamaha
 
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Location: NW Iowa
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Default Re: G2 intermittently won't start, cranks but no fire. Runs great when running

Pull the connector out of cdi box make sure none of the spades corroded
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Old 10-31-2017, 11:32 PM   #5
cfherrman
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Default Re: G2 intermittently won't start, cranks but no fire. Runs great when running

Pull tci box apart and check for corrosion and clean up.

What quality is the new parts

My orange wire on the coil likes to fall off.

The g2 is tci btw and not cdi
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Old 11-01-2017, 09:57 AM   #6
Spicyunicorn
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Default Re: G2 intermittently won't start, cranks but no fire. Runs great when running

Quote:
Originally Posted by cfherrman View Post
Pull tci box apart and check for corrosion and clean up.

What quality is the new parts

My orange wire on the coil likes to fall off.

The g2 is tci btw and not cdi
You're correct I named it wrong
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Old 11-01-2017, 06:27 PM   #7
justwondering
A Gal with a Cart!
Yamaha
 
Join Date: Aug 2015
Location: Northeast in the Republic of Texas
Posts: 462
Default Re: G2 intermittently won't start, cranks but no fire. Runs great when running

x2 on the orange wire.

The coil has two different sizes of connectors but my spade connectors are both the same size.
I used a pair of pliers and crimped the connector tighter before I put it back on the coil and it has stayed on much better.
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