spark plug gap -- 7000rpm cuts out

[skunk75]

I just read I need to get a cooler plug for the 300hp evo tune on this sled. All I have access to are the stock plugs. What should I gap them at?

The sled rips to 7000 rpm then starts cutting out. Sometimes if I let out and then immediately get back in it will run up to normal rpm.

 

[0neoldfart]

The stockers don't like to be tightened up

The fine electrode on the iridium plug doesn't like to be tightened (you risk breaking the tail off). The NGK CR9EB has a lot more meat on them, and can be gapped tighter. On my Big Chute Kit on 100LL setting, my gap is set to .020"

 

[JustBoostIt]

I'd be very surprised if that had stockers in it. The cr9eb's can get fouled and what not starting and moving sleds around. I changed a set a couple weeks ago on my old sled that were relatively new.