$txt['youtube'] = 'YouTube'; $txt['youtube_invalid'] = '#Invalid YouTube Link#'; spark plug upgrade

Author Topic: spark plug upgrade  (Read 11222 times)

0 Members and 1 Guest are viewing this topic.

Offline SgtBadBob

  • Full Member
  • ***
  • Posts: 136
  • Age: 58
  • Location: Gold Bar Washington
  • Cool Points: 3
  • NRA.org Spread the news
  • Engine: Kx-21
  • Model Year: Nov 2015
Re: spark plug upgrade
« Reply #15 on: May 30, 2014, 02:56:31 PM »
Tried puting this plug in the head to see.  It sticks in about .215 in to far. It hits the piston on the KX21!
Boeing over head crane operator [It has its ups and downs].
2015 Camo Eskape, Kx-21. ACR lightened con rod, Ceramic bearings in motor, Water cooled engine base, Port matched intake, Mini Tack, Electronic rpm limiter. Dragon Fly GPS sounder.

Offline Painlesstom

  • Painless Tom
  • Administrator
  • Mokai Maniac Member
  • *******
  • Posts: 5805
  • Age: 45
  • Location: Georgia
  • Cool Points: 59
  • Making Your Mokai... A Better Mokai!
    • Painless Products
  • Engine: EX21 w/17 head - ES
  • Model Year: 2003 / 2011 / 2015
Re: spark plug upgrade
« Reply #16 on: May 30, 2014, 04:45:29 PM »
You can get some indexing shims, use as many as needed to move the plug back. Or just use the correct plug for the head. Spark plug selection is one of those areas that some people think some huge performance gain will be noticed from some new design. Honestly, I haven't noticed any difference between plugs if I had to think back to all the times I've played with them. Gap makes a difference, but the electrode profile and material is really about longevity. Platinum and Iridium plugs will last forever, they just won't wear out in one of these motors. Now if you want to play with a  high compression small block v8 and all the go fast goodies, then you might see a difference in performance by using a different plug style, but you really aren't going to tell the difference in a low compression, single cylinder, lawn mower engine. That's my $.02 at least.  ;D
Tom

  >:D    

_________________________

www.PainlessClutch.com

Offline Odie

  • Mokai Maniac Member
  • ******
  • Posts: 958
  • Location: NC
  • Cool Points: 17
  • Engine: RS
  • Model Year: 2008
Re: spark plug upgrade
« Reply #17 on: May 30, 2014, 10:00:42 PM »
Dangerous plug to use if piston contact occurs with the kx. Way too close. The ex 21 has the same bore and stroke.  The higher compression results from a smaller chamber, not from decking which would cause chain slap and Tom is bingo, plugs are no magic wand. But if the plugs did clear and if they did perform better in a hot engine the kx would suit them nicely?  ??? 
Toss those plugs as far as you can.

p.s. I may be wrong, I have never measured the difference between the heads. Maybe the kx head is shaved? I presume way too much.
« Last Edit: May 30, 2014, 10:10:30 PM by Odie »

Offline Larry

  • Mokai Hero Member
  • ****
  • Posts: 302
  • Location: Maryland
  • Cool Points: 24
  • Engine: Honda GC190
  • Model Year: 2007/2007
Re: spark plug upgrade
« Reply #18 on: August 06, 2015, 02:17:58 PM »
Would the Autolite AR3910X spark plug work with the Honda GC190 ?

Offline Painlesstom

  • Painless Tom
  • Administrator
  • Mokai Maniac Member
  • *******
  • Posts: 5805
  • Age: 45
  • Location: Georgia
  • Cool Points: 59
  • Making Your Mokai... A Better Mokai!
    • Painless Products
  • Engine: EX21 w/17 head - ES
  • Model Year: 2003 / 2011 / 2015
Re: spark plug upgrade
« Reply #19 on: August 06, 2015, 02:22:40 PM »
Just use the stock plug Larry, nothing will work better in those motors than what came with it.
Tom

  >:D    

_________________________

www.PainlessClutch.com

Offline Painlesstom

  • Painless Tom
  • Administrator
  • Mokai Maniac Member
  • *******
  • Posts: 5805
  • Age: 45
  • Location: Georgia
  • Cool Points: 59
  • Making Your Mokai... A Better Mokai!
    • Painless Products
  • Engine: EX21 w/17 head - ES
  • Model Year: 2003 / 2011 / 2015
Re: spark plug upgrade
« Reply #20 on: March 06, 2018, 08:23:05 PM »
From a longevity standpoint, I am moving to Iridium plugs in my motors. For those who would like to do the same the NGK plug number is BR6HIX.  \./8
Tom

  >:D    

_________________________

www.PainlessClutch.com

Offline The Man

  • Mokai Maniac Member
  • ******
  • Posts: 880
  • Location: Georgia
  • Cool Points: 43
Re: spark plug upgrade
« Reply #21 on: March 07, 2018, 06:46:36 PM »
Did you find a good price online, or did you order locally?

Offline Painlesstom

  • Painless Tom
  • Administrator
  • Mokai Maniac Member
  • *******
  • Posts: 5805
  • Age: 45
  • Location: Georgia
  • Cool Points: 59
  • Making Your Mokai... A Better Mokai!
    • Painless Products
  • Engine: EX21 w/17 head - ES
  • Model Year: 2003 / 2011 / 2015
Tom

  >:D    

_________________________

www.PainlessClutch.com

Offline The Man

  • Mokai Maniac Member
  • ******
  • Posts: 880
  • Location: Georgia
  • Cool Points: 43
Re: spark plug upgrade
« Reply #23 on: March 07, 2018, 09:50:11 PM »
Thanks, found this video of it being energized.

https://youtu.be/8o00v_Rggt8

Offline Painlesstom

  • Painless Tom
  • Administrator
  • Mokai Maniac Member
  • *******
  • Posts: 5805
  • Age: 45
  • Location: Georgia
  • Cool Points: 59
  • Making Your Mokai... A Better Mokai!
    • Painless Products
  • Engine: EX21 w/17 head - ES
  • Model Year: 2003 / 2011 / 2015
Re: spark plug upgrade
« Reply #24 on: March 07, 2018, 10:59:25 PM »
It's neat to see, but I wouldn't buy into the gimmick of the pulse plug brand. lol Iridium isn't about adding performance, it's about longevity as the electrode will not wear out like conventional plugs. No erosion also means plug gap is maintained. It would literally be the last plug the motor would ever need. Chevy has been using Iridium for years, have seen several vehicles with over 100k miles and the plugs still looked new. Pretty impressive stuff.  ;D
Tom

  >:D    

_________________________

www.PainlessClutch.com

Offline Larry

  • Mokai Hero Member
  • ****
  • Posts: 302
  • Location: Maryland
  • Cool Points: 24
  • Engine: Honda GC190
  • Model Year: 2007/2007
Re: spark plug upgrade
« Reply #25 on: March 08, 2018, 07:36:19 AM »
Tom, what is the Gap Size ?

Offline Painlesstom

  • Painless Tom
  • Administrator
  • Mokai Maniac Member
  • *******
  • Posts: 5805
  • Age: 45
  • Location: Georgia
  • Cool Points: 59
  • Making Your Mokai... A Better Mokai!
    • Painless Products
  • Engine: EX21 w/17 head - ES
  • Model Year: 2003 / 2011 / 2015
Re: spark plug upgrade
« Reply #26 on: March 08, 2018, 07:41:11 AM »
Standard plug gap is .025, Iridium .040.  ;)
Tom

  >:D    

_________________________

www.PainlessClutch.com

Offline OutdoorAdv

  • Jr. Member
  • **
  • Posts: 95
  • Cool Points: 10
  • Engine: EX21
  • Model Year: 2015
Re: spark plug upgrade
« Reply #27 on: March 08, 2018, 08:09:46 AM »
It's neat to see, but I wouldn't buy into the gimmick of the pulse plug brand. lol Iridium isn't about adding performance, it's about longevity as the electrode will not wear out like conventional plugs. No erosion also means plug gap is maintained. It would literally be the last plug the motor would ever need. Chevy has been using Iridium for years, have seen several vehicles with over 100k miles and the plugs still looked new. Pretty impressive stuff.  ;D

It is impressive!  I just replaced the stock iridium plugs in one of my vehicles I bought new.  The book said replace at 60k, I had 90k on it.  I wish I pulled a plug before buying new ones... I would have left those stock plugs in for another 30k!  They were in great condition and I kept them just in case I need them later on. 

Now I'll need to pick up a BR6HIX for my Mokai.  Something I noticed on eBay and a heads up.  The plugs are BR6HIX and 3419.  Ones a SKU# and ones an Item#.  I saw an eBay listing titled "NGK 3410 Spark Plugs BR6HIX" for $4.99... umm.. that's two different plugs... the 3410 is the B4LM plug.  Obviously a listing error and who knows if you'd get a BR6HIX or B4LM plug if you ordered that.  So just make sure its 3419 and BR6HIX