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Platinum or Iridium Plugs for OPE? #4697774
03/17/18 04:19 PM
03/17/18 04:19 PM
Joined: Jul 2015
Posts: 523
Pennsylvania
Astro_Guy Offline OP
Astro_Guy  Offline OP
Joined: Jul 2015
Posts: 523
Pennsylvania
Somewhere within the next 4-5 weeks all of the lawn toys are going to come out of hibernation. Four machines haven't seen a new spark plug in three or more years, including two Honda GCV-160, one Chonda in the generator, and a 22 HP Briggs V-Twin in the lawn tractor. Given that the difference in spark plug prices is not that much and the time to replace them is the same, are there any strong reasons for or against upgrading the plugs? Is there any reason not to throw a couple of extra bucks at these plugs?

Re: Platinum or Iridium Plugs for OPE? [Re: Astro_Guy] #4697780
03/17/18 04:25 PM
03/17/18 04:25 PM
Joined: May 2010
Posts: 9,453
out there
spasm3 Online content
spasm3  Online Content
Joined: May 2010
Posts: 9,453
out there
My zero turn kawasaki engine hit 100 hours, so i bought replacement spark plugs. When i took the old ones out , the looked unworn. I put them back in.

I'm not sure about 2 cycle, but i'm not sure you need anything more than standard non platinum plugs.


13 elantra 72k 5w30 QSUD
03 chevy avalanche 80k synpwr 5w30
17 mazda cx-5 7300 miles m1 0w30
Re: Platinum or Iridium Plugs for OPE? [Re: Astro_Guy] #4697781
03/17/18 04:26 PM
03/17/18 04:26 PM
Joined: Dec 2017
Posts: 2,966
SE British Columbia, Canada
Snagglefoot Online content
Snagglefoot  Online Content
Joined: Dec 2017
Posts: 2,966
SE British Columbia, Canada
How old are you? If you put in platinums that might be the last change you ever have to do. Iridium would be way over the top. Hey, but we’re all OCD on this forum.

Last edited by Snagglefoot; 03/17/18 04:28 PM.

If you want the job done right......do it yourself.
Re: Platinum or Iridium Plugs for OPE? [Re: spasm3] #4697785
03/17/18 04:29 PM
03/17/18 04:29 PM
Joined: Jul 2015
Posts: 523
Pennsylvania
Astro_Guy Offline OP
Astro_Guy  Offline OP
Joined: Jul 2015
Posts: 523
Pennsylvania
Originally Posted By: spasm3
My zero turn kawasaki engine hit 100 hours, so i bought replacement spark plugs. When i took the old ones out , the looked unworn. I put them back in.

I'm not sure about 2 cycle, but i'm not sure you need anything more than standard non platinum plugs.

Thanks spasm3! That was my suspicion as well, but I am tempted to try this in at least one machine, possibly the one with the V-Twin. OTOH, the generator with the Chonda motor is the one that I really care about starting when needed.

Re: Platinum or Iridium Plugs for OPE? [Re: Astro_Guy] #4697797
03/17/18 04:52 PM
03/17/18 04:52 PM
Joined: Nov 2006
Posts: 20,559
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,559
MA, Mittelfranken.de
I switched everything to iridium except the lawnmower and that small plug is a B&S platinum.
I have some observations that may help you decide, nothing scientific.

My wife could not start the lawnmower ever, I had to start it. With the platinum plug she can start it first pull, same mower, same oil only the plug being different. The precious metal plugs require much lower voltage to fire, that the explanation.

The snowblower does exactly the same route every storm, again same oil (changed yearly) nothing else different. For the first 8 yrs in a storm 4 inches or more I had to refill the tank about 3/4 through, it could never finish the job without.
With the iridium it completes the job easily even in a 20+ inch storm and is still not empty. If I had to guess its doing at least 30% better on fuel (I am not saying the results in a car engine will be the same).

This thing with its algore carb runs pig rich, if you idle it for a minute and throttle back up it blew lack smoke out, now it doesn't, it idles fine. I can only attribute this again to the lower firing voltage requirement of the plug with a magneto ignition. It always started first pull and never needed the 12V electric starter.

Before I got a gas fueled generator I noticed significant improvements in fuel economy with the gasoline powered one.


ASE L1, Master. Deutsch Meisterbrief.
Re: Platinum or Iridium Plugs for OPE? [Re: Astro_Guy] #4697843
03/17/18 05:31 PM
03/17/18 05:31 PM
Joined: Feb 2015
Posts: 2,357
Slovenia EU
Kamele0N Offline
Kamele0N  Offline
Joined: Feb 2015
Posts: 2,357
Slovenia EU
I wonder how/where do you find (proper) Iridium sparkplugs for OPE?

You can match/crossreference them from automotive use.....but then heat range is not right...

champion RJ19LM....no way that you get that as iridium smile


2008 Toyota Yaris 1ND-TV 1.4 D4-D Elf FullTech FE 5w30
1997 Toyota Landcruiser KZJ95 3.0 TD Shell Rimula R6M 10w40
Re: Platinum or Iridium Plugs for OPE? [Re: Astro_Guy] #4697891
03/17/18 06:05 PM
03/17/18 06:05 PM
Joined: May 2016
Posts: 718
Canada
i_hate_autofraud Offline
i_hate_autofraud  Offline
Joined: May 2016
Posts: 718
Canada

The only reason platinum and iridium spark plugs are made is for vehicle engines that run hotter, leaner fuel mixtures
to meet emissions control requirements AND have a long service life while doing it!

Garden equipment applications simply can't push conventional plugs hard enough to make a difference!

Re: Platinum or Iridium Plugs for OPE? [Re: spasm3] #4697925
03/17/18 06:28 PM
03/17/18 06:28 PM
Joined: Dec 2016
Posts: 7,109
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,109
Waco, TX
Originally Posted By: spasm3
......... I bought replacement spark plugs.
When I took the old ones out, they looked unworn. I put them back in.


I never seem to wear out spark plugs in any OPE, either.

I have fouled a few in chainsaws over many years (27?) but never worn one out.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Platinum or Iridium Plugs for OPE? [Re: Astro_Guy] #4698130
03/17/18 09:30 PM
03/17/18 09:30 PM
Joined: May 2012
Posts: 953
Rio Rancho, NM
Pajero Offline
Pajero  Offline
Joined: May 2012
Posts: 953
Rio Rancho, NM
Iridium and forget about it!



Respectfully,

Pajero!


Always remember "Planned obsolescence."

1994 Montero SR 3.5 DOHC, 133,xxx
Fram Ultra/ Snorkel with Pre-filter
K-9-Co-pilot
Re: Platinum or Iridium Plugs for OPE? [Re: Astro_Guy] #4698174
03/17/18 10:28 PM
03/17/18 10:28 PM
Joined: May 2006
Posts: 4,045
Central Wisconsin
dwendt44 Offline
dwendt44  Offline
Joined: May 2006
Posts: 4,045
Central Wisconsin
Quote:
"I wonder how/where do you find (proper) Iridium sparkplugs for OPE?"


I tried to find a Iridium plug a couple of years ago and couldn't.
Found a similar number for an auto but the standard gap was .060 or
some such.
I ended up adjusting it down to what Briggs called for and it worked and
continues to work fine for several years now. Starts good runs good.

My 2˘


There's no such thing as:
Too big of a battery,
Too large of a gas tank,
or too loud of a horn,
or too bright headlights.
Re: Platinum or Iridium Plugs for OPE? [Re: Astro_Guy] #4698195
03/17/18 11:04 PM
03/17/18 11:04 PM
Joined: Oct 2014
Posts: 2,532
San Antonio, TX
Nyogtha Offline
Nyogtha  Offline
Joined: Oct 2014
Posts: 2,532
San Antonio, TX
I find mine on eBay. Autolite Extreme Start.

http://www.autolite.com/products/lawn-and-garden.aspx

Last edited by Nyogtha; 03/17/18 11:06 PM.

"No matter how paranoid you are you're not paranoid enough. Tell the truth. Reach as many people as you can with it. That's your weapon." - Susanne Modeski, aka "Holly" to The Lone Gunmen
Re: Platinum or Iridium Plugs for OPE? [Re: Trav] #4698493
03/18/18 09:35 AM
03/18/18 09:35 AM
Joined: Dec 2006
Posts: 969
Sweden
lars11 Offline
lars11  Offline
Joined: Dec 2006
Posts: 969
Sweden
I have not tried iridium plugs on ope but you are stating that the plug change somehow improves fuel consumption in a snow blower. Since you are running it att full throttle and there is no feedback or connection between the ignition and carb that is simply impossible unless the plugs allows you to run it at lower RPM (which I doubt, did you reduce throttle?) The carb will feed exactly the same amount of fuel to the engine at a certain rpm regardless of plug. Unless you snowblower is equipped with a full ECM this is unreasonable and more likely a seat of the pants situation. Sorry, but that is likely it.
About the tarting though, that's interesting! MAybe I will try those plugs to ease starting!

Originally Posted By: Trav
I switched everything to iridium except the lawnmower and that small plug is a B&S platinum.
I have some observations that may help you decide, nothing scientific.

My wife could not start the lawnmower ever, I had to start it. With the platinum plug she can start it first pull, same mower, same oil only the plug being different. The precious metal plugs require much lower voltage to fire, that the explanation.

The snowblower does exactly the same route every storm, again same oil (changed yearly) nothing else different. For the first 8 yrs in a storm 4 inches or more I had to refill the tank about 3/4 through, it could never finish the job without.
With the iridium it completes the job easily even in a 20+ inch storm and is still not empty. If I had to guess its doing at least 30% better on fuel (I am not saying the results in a car engine will be the same).

This thing with its algore carb runs pig rich, if you idle it for a minute and throttle back up it blew lack smoke out, now it doesn't, it idles fine. I can only attribute this again to the lower firing voltage requirement of the plug with a magneto ignition. It always started first pull and never needed the 12V electric starter.

Before I got a gas fueled generator I noticed significant improvements in fuel economy with the gasoline powered one.

Last edited by lars11; 03/18/18 09:53 AM.
Re: Platinum or Iridium Plugs for OPE? [Re: Kamele0N] #4700494
03/20/18 08:29 AM
03/20/18 08:29 AM
Joined: Feb 2008
Posts: 392
USA
smithph Offline
smithph  Offline
Joined: Feb 2008
Posts: 392
USA
Originally Posted By: Kamele0N
I wonder how/where do you find (proper) Iridium sparkplugs for OPE?

You can match/crossreference them from automotive use.....but then heat range is not right...

champion RJ19LM....no way that you get that as iridium smile


Actually the Autolite XST458DP Xtreme Start Iridium Spark Plug is a cross to the champion RJ19LM


Fear, uncertainty and doubt are excuses to do nothing!
Re: Platinum or Iridium Plugs for OPE? [Re: Trav] #4700924
03/20/18 03:46 PM
03/20/18 03:46 PM
Joined: Sep 2005
Posts: 5,907
MIchigan
Warstud Online content
Warstud  Online Content
Joined: Sep 2005
Posts: 5,907
MIchigan
Originally Posted By: Trav
My wife could not start the lawnmower ever, I had to start it. With the platinum plug she can start it first pull, same mower, same oil only the plug being different.


Thank you for that bit of info...now I'm thinking about getting one for my hard to start lawnmower that has no choke and seems to burn alot of gas. What brand of plug is it?

Re: Platinum or Iridium Plugs for OPE? [Re: smithph] #4701506
03/21/18 06:16 AM
03/21/18 06:16 AM
Joined: Feb 2015
Posts: 2,357
Slovenia EU
Kamele0N Offline
Kamele0N  Offline
Joined: Feb 2015
Posts: 2,357
Slovenia EU
Originally Posted By: smithph

Actually the Autolite XST458DP Xtreme Start Iridium Spark Plug is a cross to the champion RJ19LM


No way that I can buy that in any OPE shop/service smile But tnx anyway...will look at ebay...internet etc...

Last edited by Kamele0N; 03/21/18 06:16 AM.

2008 Toyota Yaris 1ND-TV 1.4 D4-D Elf FullTech FE 5w30
1997 Toyota Landcruiser KZJ95 3.0 TD Shell Rimula R6M 10w40
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