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Spark Plug Change Interval #4707782
03/26/18 06:51 PM
03/26/18 06:51 PM
Joined: Jul 2015
Posts: 571
Pennsylvania
Astro_Guy Offline OP
Astro_Guy  Offline OP

Joined: Jul 2015
Posts: 571
Pennsylvania
Some OPE, particularly B&S powered, call for a 50 hour spark plug change. Others suggest clean and gap at 100 hours, with no specific change interval. What's up with that? 50 hours seems ridiculous. Your opinions please.

Re: Spark Plug Change Interval [Re: Astro_Guy] #4707785
03/26/18 06:56 PM
03/26/18 06:56 PM
Joined: Apr 2016
Posts: 1,202
Campbellsville, KY
Alex_V Offline
Alex_V  Offline

Joined: Apr 2016
Posts: 1,202
Campbellsville, KY
Whenever it shows wear or affects performance.


To quote a friend, "Synthetics, man."

'85 GMC C3500, 454, 132K
'82 Mercedes 300CD, OM617 turbo, 173K (totaled 2018, in rehab)
'85 Mercedes 300TD, OM617 turbo, 217K (wife's)
'67 Suburban, 350, 331K
Re: Spark Plug Change Interval [Re: Astro_Guy] #4707802
03/26/18 07:23 PM
03/26/18 07:23 PM
Joined: Sep 2005
Posts: 6,194
MIchigan
Warstud Offline
Warstud  Offline

Joined: Sep 2005
Posts: 6,194
MIchigan
Keep a spare on hand in case you start to have issues. Then put in the new one and if that doesn't solve the issue put the old one back in.

Re: Spark Plug Change Interval [Re: Astro_Guy] #4707838
03/26/18 07:54 PM
03/26/18 07:54 PM
Joined: May 2010
Posts: 9,868
out there
spasm3 Offline
spasm3  Offline

Joined: May 2010
Posts: 9,868
out there
I bought plugs for my kawsaki fr651v engine as the manual said clean and regap at 100 hours. Though i would just replace. When i pulled them the gap was between .030 and .40. Ground and center electrode hardly worn, so i put them back in. They look like they can easily go another 100hrs.


13 elantra 75k 5w30 QSUD
03 chevy avalanche 80k synpwr 5w30
17 mazda cx-5 9500 miles m1 0w30
Re: Spark Plug Change Interval [Re: Astro_Guy] #4707894
03/26/18 08:36 PM
03/26/18 08:36 PM
Joined: Dec 2016
Posts: 8,046
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 8,046
Waco, TX
Clean and regap every 100 hours.

it is a RARE event I change a spark plug 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: Spark Plug Change Interval [Re: Astro_Guy] #4707918
03/26/18 09:06 PM
03/26/18 09:06 PM
Joined: Apr 2017
Posts: 443
TN USA
Crispysea Offline
Crispysea  Offline

Joined: Apr 2017
Posts: 443
TN USA
I almost never change plugs on my OPE. I just changed it on my trimmer after almost ten years! It was getting hard to start. It probably had 100 hours on it.

Re: Spark Plug Change Interval [Re: Astro_Guy] #4707985
03/26/18 10:17 PM
03/26/18 10:17 PM
Joined: Jan 2011
Posts: 1,084
Columbus Nebraska
old1 Offline
old1  Offline

Joined: Jan 2011
Posts: 1,084
Columbus Nebraska
I have never seen a plug on OPE actually WORN out. Not working, yes, but not wore out. I have seen plugs many many years old and working perfect, and ones practically new go bad.


2017 Nissan Frontier 4.0 5w30
1965 Mustang 200 c/4 10w30 QS defy
1964 Ford Ranchero 302 c/4 15/40 Delo
1929 ford model A No filters, and 15/40 oil
Re: Spark Plug Change Interval [Re: Astro_Guy] #4708479
03/27/18 12:54 PM
03/27/18 12:54 PM
Joined: Apr 2009
Posts: 2,933
Canada
boraticus Offline
boraticus  Offline

Joined: Apr 2009
Posts: 2,933
Canada
I pull the plugs on OPE once ever couple years or so to see how the fuel is burning. Then I clean & gap them and put them back. Some have over 1000 hours on them and I suspect will have well over twice that before I replace them. A plug usually has to fail before I'll change it. I keep spares on hand just to be on the safe side.

Manufacturers always tell you to replace parts for one primary reason: TO SELL PARTS!


Re: Spark Plug Change Interval [Re: boraticus] #4708741
03/27/18 06:00 PM
03/27/18 06:00 PM
Joined: Jul 2015
Posts: 571
Pennsylvania
Astro_Guy Offline OP
Astro_Guy  Offline OP

Joined: Jul 2015
Posts: 571
Pennsylvania
Originally Posted By: boraticus
Manufacturers always tell you to replace parts for one primary reason: TO SELL PARTS!

Yeah - echo that. I ordered a couple of NGK Iridium plugs to keep on hand. The Honda push mower refused to start last weekend, so I will try one in that machine. That one has the original plug with several hundred hours on it. I've never cleaned or gapped it. It looks like the perfect candidate for testing a new plug.

Re: Spark Plug Change Interval [Re: Astro_Guy] #4708841
03/27/18 07:36 PM
03/27/18 07:36 PM
Joined: Sep 2003
Posts: 5,834
Waterloo, ON
Bluestream Offline
Bluestream  Offline

Joined: Sep 2003
Posts: 5,834
Waterloo, ON
My Honda OPE is over 30 years old, original plugs in all. Just file and gap when they get worn

Last edited by Bluestream; 03/27/18 07:38 PM.

2000 VW Beetle 1.8T M5
2006 Pathfinder 4X4
1991 BMW 735iL
"A fool and his money are soon parted" - Thomas Tusser
Re: Spark Plug Change Interval [Re: Astro_Guy] #4708918
03/27/18 08:51 PM
03/27/18 08:51 PM
Joined: Mar 2008
Posts: 6,086
South Florida
bubbatime Offline
bubbatime  Offline

Joined: Mar 2008
Posts: 6,086
South Florida
I used to change em every two or three years, just to have a shiny new pug in there. Now I just leave them alone. If it starts and runs, that's good enough for me. I might re-gap it every half decade. Maybe.


17 Chrysler Pacifica Edge Syn 5W30
13 Yamaha XT250 Valv MC 10W40
10 Acura TSX 2.4 SuperTech Syn 5W20
06 GMC Sierra SuperTech 10W30


Re: Spark Plug Change Interval [Re: Astro_Guy] #4710806
03/29/18 06:53 PM
03/29/18 06:53 PM
Joined: Jan 2017
Posts: 436
NJ
JLawrence08648 Offline
JLawrence08648  Offline

Joined: Jan 2017
Posts: 436
NJ
I wish on snowblowers and mowers, repair and sale of used. Never replace a spark plug unless it doesn't work which is years and years.

Re: Spark Plug Change Interval [Re: Astro_Guy] #4711232
03/30/18 08:41 AM
03/30/18 08:41 AM
Joined: Jun 2011
Posts: 205
MN
Tundragod Offline
Tundragod  Offline

Joined: Jun 2011
Posts: 205
MN
My troy Bilt snow blow says "Service the Spark Plug After every season or 100 Hours". Seems excessive but a plug is only about $2.......


12 Highlander limited, 08 Accord EXL 4, 04 MDX Tour, 02 CRV EX, 1995 Virago.
Re: Spark Plug Change Interval [Re: Astro_Guy] #4711305
03/30/18 09:34 AM
03/30/18 09:34 AM
Joined: Dec 2003
Posts: 10,092
Florida, Cape Coral
Eddie Offline
Eddie  Offline

Joined: Dec 2003
Posts: 10,092
Florida, Cape Coral
My B&S 20HP twin says 50 hours on spark plugs. I pull them at 50 and they look very good. I clean with a fiber brush, check gap and reinstall. ed


CX5 Touring 2.5L :-)
Re: Spark Plug Change Interval [Re: JLawrence08648] #4711369
03/30/18 10:11 AM
03/30/18 10:11 AM
Joined: Apr 2009
Posts: 2,933
Canada
boraticus Offline
boraticus  Offline

Joined: Apr 2009
Posts: 2,933
Canada
Originally Posted By: JLawrence08648
I wish on snowblowers and mowers, repair and sale of used. Never replace a spark plug unless it doesn't work which is years and years.

https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4700105/2/Generator_Maintenancerous


If all you own is a single cylinder lawn mower, the cost is insignificant. When a person has numerous machines with multiple plugs, the cost becomes a factor.

Not sure what plugs you're buying for $2.00. We pay over $5.00 for an NGK up here.

Regardless of the cost, why would anyone want to throw out a perfectly functioning part simply because the "manual says to"? Does that make any sense whatsoever?

Manufacturers love people who follow instructions without thinking about what they're doing.

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