[Jim Silverheels]

Check the rotor to see if the magnets are strong. This was the cause for us on several engines. Why they lost their magnetism I don’t know but this WAS THE CULPRIT.

[oldmeatwad]

Thanks Jim will do. Additionally, I emailed PRD to see if they can provide voltage and ohm specs for the CDI module. If the voltage coming from the CDI is wrong, then I know we have another bum module and/or something is killing the module. I say this as the Kart did start on its own within 2 seconds before we shut it off and then encountered the no start condition.

 

LINK TO PHOTOS OF EASYSTART PIN-OUT THAT I NEED SPECS FOR:  pics

[Lawrence Doty]

Will it start with an external starter?

What carb are you using?

Can you see fuel moving in the line while cranking?

Reason’s my PRD didn’t start….

1) Wire connections at starter loose. The crimps looked tight but they weren’t…

2) Wire rubbed against chassis and grounded.

3) Air filter boot torn.

4) carb settings too lean.

[James Churchill]

I would love to know the outcome of this for general knowledge when dealing with my PRD Fireball.

[oldmeatwad]

OUTCOME –

The Coil was bad and fried the CDI. This made perfect sense as the CDI I replaced lasted for 1 start and then was toast. With the new coil and CDI it literally starts in 5 seconds on first button push.

 

That aside – HUGE PROPS to Art and Rod at RLV (http://www.rlv.com/). These guys were nothing but pros all the way. Lots of same day emails, extremely responsive and even brought in a test kart to confirm what the readings should have been. In the end I shipped them our entire Easystart system that they diagnosed the same day it arrived in cali. I cant say enough about the service I received and how happy I am to have these guys backing us up.

 

Concerning the technicals – here it is.

FACTORY = Known good easystart system

ME = the readings from our kart before the repair. You can see readings off the relay were definitely not right and our CDI was .11V off.

 

——————————————–

BATTERY

 

FACTORY:  12.7v / 10.4v on crank

ME: 12.58v / 10.55v on crank

 

RELAY GREEN WIRE

 

FACTORY: .63v

ME: .19v

 

RELAY WHITE WIRE

 

FACTORY: 9v

ME: 9.9v

 

BLACK & YELLOW TO COIL FROM CDI:

 

FACTORY: .43

ME: .32 on crank

 

RED & WHITE/GREEN CDI

 

FACTORY:  9.23 ohmns

ME:  9.23 ohmns

 

TRIGGER ON STATOR WHITE/RED

 

FACTORY:   .12 ohms with switch off

ME:  .12

 

FACTORY:  .17 ohms with switch on

ME: .12

 

FACTORY:  .4 volts cranking

ME: .3

————————–

 

I hope this helps others in the future. I will carry these readings in my box from this day forward.

 

 

 

 

 

[Author]

Posts