Sparkplug Gap

[Cid6.7]

I've been searching the forum I just got new NGK plugs & saw the gap should be from .20 to .24 for my 97 Challenger 1800 Twin..
I know .04 isnt very much but what is the manufacture specs? Or "preferred" gap

Thank You

 

[kustomkarl]

Spark Plugs 2 stroke ALL of them NGK BR8ES Gap/ 0.5-0.6mm or .020-.024in.

Karl

 

[Cid6.7]

Thanks again karl
Ok did a compression test on both engines 150 straight across both engines woot..! New plugs all around gapped to .022 ( split the difference ) lol

But now my idle is way high @ 3000rpm as soon as they fire up..
Shall I just turn idle screw down so idle around 1000rpm? Should this be done in water or on trailer..

Thanks again :cheers:

 

[glenwhitt]

3,000 on trailer is 1,500 in water, and thats good

 

[Cid6.7]

3,000 on trailer is 1,500 in water, and thats good

Wow then my idle was way borked with them fouled up plugs..lol :rofl:

Were both @ 1200rpm on trailer..lol

Thanks glen

 

[glenwhitt]

ya. 1200 on trailer is like stall out in the water