NGK Spark Plugs

[just-pinch-it]

The projected tip keeps the electrode clean at low loads(hotter acting) when combustion temps are lower, and then at higher load it transferes more heat to the water jacket(cooler acting). It's the longer exposed length of the insulator nose from the metal jacket that gives it these features.

 

[Ironmanstl]

2012/2013 plugs

Picked up some plugs the other day for my 12 pro rmk
Didn't seem to be the same part number as I remember
Polaris parts catalog lists:

2012 pro rmk NGK GR9A EG
2013 pro rmk NGK BPR 9ES

Is the 13 plug the same as the 12 and can it be used in the 11-13 pro?
Physically it looks identical

Thanks

 

[tek9tim]

Yup, that's what's on the 12. I hadn't compared them to the plugs for the 13 (same as my leftover spares for my old xp), nor looked at the ngk number reference, but I'd be interested to know what the difference is.

 

[Oregonsledder]

Yup, that's what's on the 12. I hadn't compared them to the plugs for the 13 (same as my leftover spares for my old xp), nor looked at the ngk number reference, but I'd be interested to know what the difference is.

The 12 plug is more foul resistant and the 13 plug. Both work fine.

 

[tek9tim]

Thanks MH (I'm assuming) for mashing the 2 threads together. I must have missed the earlier thread somehow, good info!

 

[v8lover]

Im still head scratching I had BPR9ES in my 11' sba, PA head, hps can sled ran fine, then decided to install BPR9EIX, ran great all weekend loaded sled up, got home ran like crap. checked the plugs both fouled out, took it to the dealer thinking maybe injectors, or Tps, they checked for codes-none, replaced the plugs to BPR9ES and they ran the sled around for awhile sled runs fine, I went to start it after sitting there for the day and had to pull it over 5 times to get it started. I'm not convinced.