305 380 #1 Posted February 24, 2021 it seams to me that some Kohler engine used a Champion H10....? what about a H11...? Share this post Link to post Share on other sites
squonk 43,714 #2 Posted February 24, 2021 I ran an H-12 in a K301 that was fouling plugs. Share this post Link to post Share on other sites
Achto 29,351 #3 Posted February 24, 2021 20 minutes ago, 305 said: Champion H10....? what about a H11...? H11 would be a little hotter, not sure if you would notice the difference much. https://www.ngk.com/heat-range-conversion-chart-2 Share this post Link to post Share on other sites
305 380 #4 Posted February 24, 2021 good to know..thanks for the info! in my cleaning out the shed and garage of years of accumulation i found 5 Champion H10's and 6 H11's. they are new in an individual package with the clear plastic...remember that? i have no need for them , but thought maybe be wanted by someone. 1 Share this post Link to post Share on other sites
Achto 29,351 #5 Posted February 24, 2021 (edited) 39 minutes ago, 305 said: 6 H11's A full set for a flat head Studebaker or a Hudson Hornet. Champion H11's seem to have been discontinued. Edited February 24, 2021 by Achto 1 Share this post Link to post Share on other sites
squonk 43,714 #6 Posted February 24, 2021 Yes no H11. I had to buy the 12 when I was trying to get that 301 to run longer than 10 minutes. Share this post Link to post Share on other sites
RJ Hamner 1,025 #7 Posted February 24, 2021 Haven't had a whole lot of luck with Champions as of late. Switched over to NGK B-4L's and haven't had a problem (your mileage may vary) Share this post Link to post Share on other sites
305 380 #8 Posted February 24, 2021 These are really old NOS plugs......maybe 30-40 years old, so I’m sure they are ok Share this post Link to post Share on other sites
Stepney 2,354 #9 Posted February 24, 2021 If nobody else has piped up first, I for one would be interested depending what you wanted for them. My luck with current Champion is rather poor but I like the authentic older looking Champ's in my restored show engines. 2 Share this post Link to post Share on other sites
lynnmor 7,788 #10 Posted February 25, 2021 It would be good to see a side by side photo of the old and new Champions. I have a number of new Champions and they look like they were threaded in a third world country. Those rough threads can't be good for aluminum heads. 1 Share this post Link to post Share on other sites
tom2p 2,394 #11 Posted February 25, 2021 11 hours ago, lynnmor said: It would be good to see a side by side photo of the old and new Champions. I have a number of new Champions and they look like they were threaded in a third world country. Those rough threads can't be good for aluminum heads. I have some old and new Champion plugs - I'll try to get a pic this weekend (if I can get into my parts supply) I might have old / made in USA - and some old made in Mexico - and some current (made in Mexico ?) ... not sure - I pitched a bunch of plugs this past summer I was never a fan of Champion plugs - but the current plugs look even worse (than the old plugs) NGK and ND threads look much better - appear to be rolled (?) - and the Champion threads appear to be ... cut ... machined ... ? ... bad ... lol Share this post Link to post Share on other sites
richmondred01 2,307 #12 Posted March 4, 2021 I like the autolite plugs. Share this post Link to post Share on other sites
