Suzuki ATV Master!
Join Date: May 2014
Location: Middle of Alaska
What year is this Quad?
Spark plug wet or dry?
My bet that it isn't getting enough fuel.
However, I just did battle with a snowmachine that would basically do the same thing. Fire and then die. Pull the plug and check for spark and it was a nice blue spark. Put it back in and try it, pop pop, die.
I happened to have a new CDI and coil for it so I replaced it all. Verified that I was getting voltage out of the CDI to the coil. Put the spark plug in and pop pop die.
Replace the spark plug with another one and same thing. I tried 3-4 different spark plugs and the only one that would give me a blue spark was the one I pulled out. The rest of them were dead. I pulled a spark plug out of another machine and put in this machine and it fired right up. Found out the original spark plug was failing as soon as it fired up. The others should have been compatible, but evidently were not.
technical: Machine calls for a BR9ES. Other spark plugs were BR9EYA and the Autolite equivalent. BR9EYA is nearly identical except for a groove in the anode. They should be 100% compatible. I use the BR9EYA in most of my other machines. In fact, one machine that calls for BR9ES runs better/longer with the BR9EYA's.
Anyway, the bottom line of this long-winded post is that your spark plug may work outside of the motor, but may be failing once under compression.
2013 Suzuki King Quad 500 AXi w/EPS
1990 Suzuki LT-4WD 250
and lots of snowmachines