« previous next »
Pages: [1]   Go Down

Author Topic: spark plugs  (Read 5806 times)

0 Members and 1 Guest are viewing this topic.

Offline allntexas

  • Turf Warrior
  • **
  • Posts: 111
  • Karma: 0
  • Gender: Male
    • View Profile
spark plugs
« on: March 04, 2006, 09:01:17 pm »
Just installed my new billet flywheel on a 20hp Intek and when test running it, it acts like one of the plugs is firing intermitantly.  Runs smooth for several seconds and then rough for a while and the exhaust sound changes.  It has plugs in it that have the Briggs logo on them and I would like to put in some better ones.  What is a good plug to use in the Inteks?
Logged
Dennis Drake #68
2011,2013,2014 C/P LSMRA Points Champion

Offline George Herrin

  • aka SUPERMAN
  • Superman
  • Highly Mowtivated
  • *
  • Posts: 17732
  • Karma: 102
  • Gender: Male
  • I am going to Race Every Race like its my last one
    • View Profile
    • BTMRA Home/Forum An Independant Club.
spark plugs
« Reply #1 on: March 04, 2006, 10:47:05 pm »
NGK Get a cross over for a Champion RC12YC . I do not know the number off my head but this is what we use in our Briggs OHV. Any of them.
Logged
George Herrin #6
Indian Power.. You gotta Go big to beat em or Go HOME
8 time ARMA National Champion
4 time USLMRA National Champion
Retired from BP
www.herrinmowersports.yolasite.com
www.allamericanmowerchampionships.yolasite.com
My other racer is a 1/5th scale Dirt Late Model!!!!

Offline allntexas

  • Turf Warrior
  • **
  • Posts: 111
  • Karma: 0
  • Gender: Male
    • View Profile
spark plugs
« Reply #2 on: March 05, 2006, 06:27:53 pm »
Installed new platinum plugs and there is no difference.  The only thing I have done to this motor is added the billet flywheel, no internal work at all.  It is acting like maybe the valves are floating at high RPM's.  Are the springs in the 20 HP Intek so week that this could be a possibility?  It reaches higher RPM's now with  the aluminum flywheel.  Or could it be a carburation problem?  There is a noticable difference in  power and in the sound from the exhaust.
Logged
Dennis Drake #68
2011,2013,2014 C/P LSMRA Points Champion

Offline allntexas

  • Turf Warrior
  • **
  • Posts: 111
  • Karma: 0
  • Gender: Male
    • View Profile
spark plugs
« Reply #3 on: March 05, 2006, 06:31:47 pm »
One other thing I did do to it was, I cut off the tip of the plunger on the solonoid on the carb.
Logged
Dennis Drake #68
2011,2013,2014 C/P LSMRA Points Champion

Offline matt25001149

  • Mow-Forum Junkie
  • ***
  • Posts: 1010
  • Karma: -10
  • Gender: Male
    • View Profile
    • http://www.WesternOntarioOutlaws.com
spark plugs
« Reply #4 on: March 05, 2006, 06:44:05 pm »
ya youll probly have the problem of the valves floating because the spirings are not quite strong enough to handle the rpms so they will begin to float arpund 5000 or so so you could get billet valve keepers and double springs
Logged
#87 Outlaw
Western Ontario Outlaws

Offline allntexas

  • Turf Warrior
  • **
  • Posts: 111
  • Karma: 0
  • Gender: Male
    • View Profile
spark plugs
« Reply #5 on: March 06, 2006, 06:27:37 pm »
How exactly do you do double springs?  I have heard that you can use springs from an 8HP Briggs and put them inside the stock Inteck springs.  Do you use intake with intake and exhaust with exhaust, or some other combination?  Will the stock retainers work for this or do I need to get some other retainers?  And what are the specs for gapping the valves on a 20 Hp Intek?  Any help will be appreciated.

Thanks,
Dennis Drake
IMOW, S/P, B/P #168
Logged
Dennis Drake #68
2011,2013,2014 C/P LSMRA Points Champion

Offline henrym1958

  • Newbie
  • *
  • Posts: 4
  • Karma: 0
    • View Profile
spark plugs
« Reply #6 on: March 07, 2006, 08:33:56 am »
Cross over from Champion RC-12YC to NGK is

NGK-5155
Logged
Pages: [1]   Go Up
« previous next »