What spark plugs do you like

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Cracked insulators shorting out ,packing failing allowing the insulator to rattle about within the metal body NEW plugs out of the box that did not work.Never had these problems with any other brand. However its been so long since I have used them perhaps they have solved their issues,but they lost me 20 years ago!
 
Cracked insulators shorting out ,packing failing allowing the insulator to rattle about within the metal body NEW plugs out of the box that did not work.Never had these problems with any other brand. However its been so long since I have used them perhaps they have solved their issues,but they lost me 20 years ago!

Ditto
 
Sparkies

Well, in my years of running 2 and 4 stroke Jap bikes, I settled in on NDs with NGK as a close second. In my years running German and Japanese sports cars, I used NGK and Bosch. In my years of running American muscle cars, I used Champions and Autolite. In my crazy Land Rover-Joe Lucas (Price of Darkness) days, I used Bosch. Now in my Toyota Tundra PU truck days, I use NGK platinum plugs. They last about 50k miles.

In the 2-stroke Stihl and Echo tools we have on the farm here the plug is:

NGK: BPM7A (or BPMR7A)
Bosch: WS6F (or WSR6F)
Champion: CJ6Y (or RCJ6Y)
Autolite: 2974
Nippon Denso: W22MP-U

Right now I am partial to NGK's and have them in all the Stihl tools. There is a Bosch in the Homelite blower, and a Champion in the Echo chainsaw. I think I will buy a box of 10 NGKs on Ebay and be done with getting sparkplugs at the shop. Our Olympyk saw takes a BPM6A plug... the oddball saw that I rarely use (has different premix gas/oil ratio as well, everything else here uses 50:1).

Now, the issue of slightly hotter or colder plug... in 2-strokes if they are fouling out, I tend toward a hotter plug. Note that in the list above, the Bosch has the narrowest heat range, and a Champion CJ6Y overlaps a Bosch WS5F through WS7F. The R in the above list is for resistor type plugs, and Stihl calls for them over the standard plugs.

Then there are the new coated electrode plugs. And odd shaped plugs. I like the NGK platinum plugs in my 4-strokes as they last longer. In all the baby 2-strokes I am still using standard plugs, and change 'em out more often. Bosch has Cromium Nickle plated plugs out now. Never tried them. I do not think that U shapes, v-shapes or split-fire electrodes do anything more than a standard electrode. Actually I think that they are harder to gap.
 
I'm sure if you read the other post on the spark plug topic, you saw where I recommended switching to and using the E3 plugs and some benefits of doing so. Well I stumbled across something of interrest today that goes to further show the benefits of using this plug and even though it has nothing to do with chainsaws it does help to show the benefits of one make of plug over another. Here's the link to the site I'm talking about ---

http://www.dodgedakotas.com/boards/v6/14623.html
 
E3 Iridium plugs

I'm sure if you read the other post on the spark plug topic, you saw where I recommended switching to and using the E3 plugs and some benefits of doing so.

Well, I do not know much about E3 plugs, but they main equivalent type for all Stihl and Echo, most Husky and Dolmar etc. saws is the E3.12 plug. They are also really expensive: $7 bucks a pop at JC Whitney and Amazon.com.

E3's are iridium plugs, and iridium is supposed to have and keep a better edge for sparking and allow for using cooler plugs while not fowling. Is it worth 2 gallons in gas over a std. plug? I dunno...
 
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I bought mine (E3.12's) for $6 a piece at Lowes in their small engine / gardening section.

I agree they are a little pricy, but it has always been my experiance that you "usually" get what you pay for and the absolute worst thing that I have ever hated is getting out in the woods (a good distance from the house) and a saw dies or won't start from a bad plug or out on a job site, being paid to do something and you have to tell the person your working for that you have to go back to the house, because your saw or equipment won't run anymore because a plug clunked out on you. I've personally had very lightly used NGK's (1 or 2 hours of use) go bad and cause this, but most of the time it was because of a Champion plug is why I will no longer use Champions in any engine unless this is just the rare engine that you absolutely have to use a Champion plug in.

Dunno, guess it's just up to a persons personal experiances. I personally like them and will continue to use them until they start letting my down. So far so good with no problems.

Guess it just depends on whether or not your willing to spend $4 more over your standard plug or not.
 
Plugs failing

Well, none of the saws/2-stroke tools here never broke down on me becasue of bad plugs. I had a leaky gas line in the 290 a while back that casued problems, and I had to raise the idle on it a while back to keep it from stalling out. I had to lower the idle on the Echo too. The carb settings seem to creep around on buzz saws. Clogged air filters seem to be a far bigger problem for me on all the 2-strokes. Also keeping chains sharp, spooling on more trimmer line, and remembering to bring enough mixed gas and bar oil are bigger show-stoppers for us out in the woods.

For me the secret with plugs is using good gas and oil to mix it with. I use premium fresh gas and Castrol, Homelite, Echo or Stihl orange bottle 50:1 oil mixed to about 45:1. No outboard motor stuff or cheap generic blue goo. Then there is keeping the mixture right with the carbs, and um, that's about it. :blob2:
 
I use what the guy across the counter sells me. If I pick, I will usually ask for Bosch, NGK, or NipponDenso. I've never really had plug problems, per se, they work, and I'll often replace them before they really even show wear. They are cheap, and not a problem I want to deal with.

Mark
 
Keep using Champion, learn the hard way, I did

Electrode came off, wiped out my Old Sl14. Electrode came off damage dirt bike engine badly. No to Champion. Running all NGK.
 
Stihl plugs

so what is the ngk # for saws???

does BPM7A = ws6f???

NGK: BPM7A (or BPMR7A)
Bosch: WS6F (or WSR6F)
Champion: CJ6Y (or RCJ6Y)
Autolite: 2974
Nippon Denso: W22MP-U

Stihls use the resistor type plug, with the R in them. These plugs are all pretty much the same heat range, and they are the plug for pretty much all the Stihl saws out there.
 
Does NGK make an iridium plug for saws? My quad came stock with NGK iridium and I Haven't had a problem with them and I have abused the wee out of the thing.

The only plug problems I have had were with champions in a ford truck. I have heard that fords and champions don't mix but I duno weather that is true or not.
 
Does NGK make an iridium plug for saws? My quad came stock with NGK iridium and I Haven't had a problem with them and I have abused the wee out of the thing.

The only plug problems I have had were with champions in a ford truck. I have heard that fords and champions don't mix but I duno weather that is true or not.

Not sure about the Champions, I wont run them unless I have no other choice. I do know Fords and Bosch DO NOT MIX!!! My F-150 pucked and gagged on every set I tried, got a set of Autolite's, and the world is fine again!
 

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