This is a first...

trooney · Apr 16, 2019

Duane(Pa) said:
Gotta ask, where were these plugs made? Doubt it says 0n the plug, but the box might have it on.

I'll check tonight, still have 1 left over from the pack it came in. I've got alot of NGK's left, so more saws are going out the door with NGK. Might just try Denso @Wolverine , how long have you been using em?

Wolverine · Apr 16, 2019

A little over 3 years, so not really that long. I've averaged about 12 cord per season and milled a chit ton of ash, apple and maple.

I didn't have an issue with NGK, but after the Champion problem, I bought a 10 pack and never looked back.

FergusonTO35 · Apr 16, 2019

I use Denso in everything, even Ford and Mopar. Autolite makes a good plug for four strokes, certainly no worse than Champion. I bought a bunch of the J17LM equivalent for like .50 cents each awhile back and they've worked well in my side valve B&S.

Larry B · Apr 16, 2019

Has anyone ever tried to figure out why a plug "failed"? All the no start issues caused by plugs I have seen on OPE is from fouling. I have had people bring me equipment that won't start and you can pull the plug and ground it and see it spark it not work in the equipment. If I clean the plug in the sand blast cleaner it works. The plugs are carbon fouled and arcing up the insulator. Usually people don't run the equipment hard enough to get the plug hot enough to get it in the self cleaning range and the plug fouls fairly quickly. They think they are being nice to the equipment being easy on it not running full throttle.

RD35 · Apr 16, 2019

I had an 036pro quit on me once while in the cut...was working it real hard when it died. Would not restart. Sat it back on the truck and grabbed another saw. 30 minutes later picked it up again and it started. Began cutting with it and in about 30 seconds it quit like I hit the kill switch. No restart! This pattern continued for a couple more tries! Each time it would cool down and restart only to die about 20-30 seconds later in mid cut. Plug was not all carboned up. But it had developed a crack in the electrode porcelain that would open up when hot and close when it cooled. New plug fixed it!

trooney · Apr 16, 2019

RD35 said:
I had an 036pro quit on me once while in the cut...was working it real hard when it died. Would not restart. Sat it back on the truck and grabbed another saw. 30 minutes later picked it up again and it started. Began cutting with it and in about 30 seconds it quit like I hit the kill switch. No restart! This pattern continued for a couple more tries! Each time it would cool down and restart only to die about 20-30 seconds later in mid cut. Plug was not all carboned up. But it had developed a crack in the electrode porcelain that would open up when hot and close when it cooled. New plug fixed it!

That sounds like my problem because by the time I got back to the garage it had a little time to cool down. But it ran like crap when it started. The thing about it is it was running hard and just stopped all of a sudden.The plug was fine, tannish color, not all carboned up. I'm not the easiest on my equipment either, but do maintain it.

redline4 · Apr 16, 2019

Given the fact that they fire every crankshaft revolution and cost as little as they do, because we know the manufacturers are still making a profit, it's actually quite impressive they last as long as they do.
That's a lot of spark in 1 cord of wood.
And lasts longer than a Harbor Freight screwdriver.

huskyboy · Apr 16, 2019

Larry B said:
Has anyone ever tried to figure out why a plug "failed"? All the no start issues caused by plugs I have seen on OPE is from fouling. I have had people bring me equipment that won't start and you can pull the plug and ground it and see it spark it not work in the equipment. If I clean the plug in the sand blast cleaner it works. The plugs are carbon fouled and arcing up the insulator. Usually people don't run the equipment hard enough to get the plug hot enough to get it in the self cleaning range and the plug fouls fairly quickly. They think they are being nice to the equipment being easy on it not running full throttle.

I agree, chainsaws are made to run at full throttle balls to the wall. Only time I don’t is if I’m warming it up, cool down after a long cut or easing up on throttle finishing a cut.

~WBF · Apr 16, 2019

Larry B said:
Has anyone ever tried to figure out why a plug "failed"?

They are $3.29 and accessible under a snap cap. I have the bar wrench and spares on me.
Not much to think about there. No.. I get what you are saying and agree. Not a lot of things are what they used to be either. Yeah I usually experience them failing under compression or intermittent issues with heat (as mentioned above) possibly more common than having one not fire these days? Experience through saws I have ran, the on/off switches are the same,
intermittent or running 'halfway'. Quality has gone down. A lot has changed in the last 13-14 yrs. I didn't learn hardly anything about saws in the first 18 yrs. I never had any saw troubles to speak of.
I went through four 262 XP for thinning from '92 - '96. You just learnt to trend the common issues with each model. 266 was good. I coil would go in someone's saw now and then or a mount.
You could get away with one 262 or 266 if you had the right parts on hand.
For my walkerized 262's I always had to have a spare clutch drum. I broke three of them as I would always cut bush with 5 flat strokes off the rakers right out of the box. Recoil spring, gas & oil caps. Plug, drum bearing, You had to blue silicone around all the metal prong and lead connector of the coil or they quit in wet days. And 24 hour JB Weld + 10 min two part putty in you pocket for the tank to fix mid day.
My first one the screw in the butterfly wore finger loose and was seconds from falling in the carb. Unbelievably lucky to have looked at that time. So I would have the mechanic loctite new saws They shouldn't come out but they pounded the ground. About 150 days per saw life
I never really got practice at saw behaviors until I become a crash test dummy for a Certified Marine/small engines mechanics reconditioned saws with AM, BB builds and unknown to man AM accessories.

FergusonTO35 · Apr 16, 2019

I've had a few crack the insulator and leak to ground. Actually seen more of that in auto plugs, come to think of it.

ABarrick · Apr 16, 2019

Denso ftw. I’m an NGK fan and use a ton of them in my shop. Knock on wood, never any dead out of the box. I do prefer denso but NGK is far easier/quicker to get locally. I will vouch for denso being the longest lasting plugs I have ever seen. On many occasions I’ve removed oem denso plugs from Toyota and Honda vehicles with 200k miles on them that you wouldn’t be ashamed to put back in and keep going.

Pretty recently I had an interesting one that proved it for me. 2011 Tacoma came in for 100k service. First time for plugs in this truck. 4.0 v6 engine. From new, it had NGK on the drivers side bank and Denso in the passenger side bank. The denso plugs had little signs of wear. The NGKs had noticeable errosion on the electrode. Truck ran fine, no misses or poor drivability, just scheduled maintenance. Made me laugh though when I pulled them.

usmcbuckwild · Apr 16, 2019

I had some of the bad Bosch plugs years ago and went to NGK. Haven’t had much issue with them at all. I remember the old Toyota 22re engines ran absolute best with NGK plugs. Champions were the way to go for years but I had bad luck with them in vehicles and in mowers/lawn tractors. My Duster absolutely ran like dog crap on Champion plugs. I ran Denso in that, never had any more issues but they were quite pricey.

Wagnerwerks · Apr 16, 2019

In the past year I have fixed 5 or 6 ( I'd have to check my records but im pretty sure it was 6) cars that had odd drivability issues by replacing autolite or champion plugs with ngk or densos. I know 3 sets had less than 100 miles on them.

Billy Currie · Apr 16, 2019

I have always liked Bosch, NGK and Denso over Champion in outdoor power equipment. I always thought they had a higher resistance to fouling. Then when I got in to aviation I saw Champion dominates the market......geez people leave the ground with this crap? LOL

FergusonTO35 · Apr 16, 2019

ABarrick said:
Denso ftw. I’m an NGK fan and use a ton of them in my shop. Knock on wood, never any dead out of the box. I do prefer denso but NGK is far easier/quicker to get locally. I will vouch for denso being the longest lasting plugs I have ever seen. On many occasions I’ve removed oem denso plugs from Toyota and Honda vehicles with 200k miles on them that you wouldn’t be ashamed to put back in and keep going.

Pretty recently I had an interesting one that proved it for me. 2011 Tacoma came in for 100k service. First time for plugs in this truck. 4.0 v6 engine. From new, it had NGK on the drivers side bank and Denso in the passenger side bank. The denso plugs had little signs of wear. The NGKs had noticeable errosion on the electrode. Truck ran fine, no misses or poor drivability, just scheduled maintenance. Made me laugh though when I pulled them.

You a Toyota tech bro?

MustangMike · Apr 16, 2019

I have not had any issues with NGK plugs in saws. I am bias against Champion because I had trouble with them in cars a long, long time ago, likely not relevant any more (plugs then were only expected to last 15,000 miles, but the didn't).

I also have several saws running Farmtech plugs w/o any issues, so go figure.

However, I totally agree with the premise of this thread, always check the easy stuff first (air filter, fuel filter, plug and electrical connections).

When someone brings me a saw that does not run right the first thing I do is ask if they have replaced those items. Then I ask about the fuel ...

ABarrick · Apr 17, 2019

FergusonTO35 said:
You a Toyota tech bro?

Self proclaimed lol. I’m an independent shop/inspection station. I’ll work on just about anything, but I have an affliction for rusty Toyota trucks.

Wagnerwerks · Apr 17, 2019

ABarrick said:
Self proclaimed lol. I’m an independent shop/inspection station. I’ll work on just about anything, but I have an affliction for rusty Toyota trucks.

What other kind is there?

shadco · Apr 17, 2019

Ran Lodge’s for years, not sure they are a thing anymore.

.

PA Dan · Apr 17, 2019

Stump Shot said:
These were replaced with new NGK, not a problem one.
All rebuilt saws leave with a fresh NGK plug in them.
Oregon makes a great replacement plug as well.
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