Bosch R6 Spark Plug

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Boog

Minister of Fire
Oct 31, 2012
593
NE Ohio
Does anyone know what would be the equivilant plug for a Bosch R6 spark plug. A guy that I got one of my "ammo" saws from recently gave me two new ones that he had bought for it. They look like WSR6F / R10 size plugs, but I can not find any reference to R6 plugs like them online. The only R6 I come up with is a longer micro R6 plug for motorcycles. I don't want to use them until I can verify what they are for sure. He had the usual RCJ6Y Champ in the saw.

While we're on the subject, anyone have a preference for Bosch vs Champion vs NGK vs others for chainsaw use?
 
P

Pallet Pete

Guest
I dont care for Bosch personally Campion and NKG both work well for me. Bosch just seems to stop working quicker and I tend to get spark issues within a few months so I stopped using them all together. Champion and NKG seem about equal to me.

Pete
 
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MasterMech

Guest
NGK/Bosch is the OEM plug and has worked well for me. Most non 4-mix Stihl stuff is the Bosch WSR6F plug, NGK BMR7A or Champion CJ6Y I believe. I have had good luck with the Bosch and usually stock it.

I've also been throwing away defective Champion RC12YC plugs left and right.
 

Boog

Minister of Fire
Oct 31, 2012
593
NE Ohio
Thanks guys, these R6 plugs are brand new but probably best that I just toss them into the recycling bin. The various saws I have are pretty evenly mixed between Bosch, Champs, and NGK (and one Autolite 2984). Haven't seen any difference to date.
 

Boog

Minister of Fire
Oct 31, 2012
593
NE Ohio
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Boog

Minister of Fire
Oct 31, 2012
593
NE Ohio
Ah, found it, R6 is the same as WSR6F. I forgot with spark plugs that its not as important as what's written on the upper ceramic insulator, as what's "written/stamped" on the metal lower nut. R6 ceramic labeled plugs say "WSR6F-China" on the metal part.................... R10 ceramic labeled plugs say "WSR6F-Brasil" on them................. that's right, Brasil, not Brazil. That confused me too, had to look up Brasil, it is actually the correct spelling of the country, only us anglos spell it Brazil. Learned a couple of new things this fine New Years morning! :cool: I'm going to stick that Chinese made WSR6F plug in my new "old" 036 and go cut some wood!

Hey Pete, maybe that's why you have been having trouble with Bosch plugs ........................... maybe the country of origin has something to do with it? R6 and R10 "WSR6F" plugs may have significantly different performance based on possible inferior manufacturing?
 

greg13

Minister of Fire
Jan 5, 2012
903
CNY
NGK/Bosch is the OEM plug and has worked well for me. Most non 4-mix Stihl stuff is the Bosch WSR6F plug, NGK BMR7A or Champion CJ6Y I believe. I have had good luck with the Bosch and usually stock it.

I've also been throwing away defective Champion RC12YC plugs left and right.
Funny how some things never change. Years ago (early 80's) I did a full blown tune up on one of the Tree trucks. Plugs, Points, condenser, cap, rotor & Wires. It WOULD NOT RUN!!! After checking all the obvious things to screw up it came down to the new Champions. Pulled them out and put the old Autolites back in and it ran like a top. I have run very few champs since then.
 

Boog

Minister of Fire
Oct 31, 2012
593
NE Ohio
hello,i am new here
Hi there Everyday, welcome to the forum, this looks like your first post here! Just jump in anywhere you have a comment or question!
 
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