WHNerd 8 #1 Posted July 26, 2021 Looking for the best spark plug for a Kohler K321 engine. Thanks Share this post Link to post Share on other sites
953 nut 55,316 #2 Posted July 26, 2021 (edited) Champion H-10 will do the job. Edited July 26, 2021 by 953 nut 4 Share this post Link to post Share on other sites
WHX?? 48,828 #3 Posted July 26, 2021 Now Richard you know how some of the fellas feel about Chumponions. ... unfortunately I don't know the cross to others......Auto lite 36????? ..CRS..... 2 Share this post Link to post Share on other sites
roadapples 6,983 #4 Posted July 26, 2021 I was thinking 16 ???? 1 Share this post Link to post Share on other sites
tom2p 2,394 #5 Posted July 26, 2021 NGK is a top quality plug many prefer NGK over Champion - going back years and even more currently (MIM Champion quality has dropped ?) NGK threads are better - NGK rolled vs Champion machined (and too often poorly machined) NGK insulator and electrode are also better I believe the NGK equiv to a Champion H-10 is NGK B-6L (but please verify) 2 Share this post Link to post Share on other sites
WHX?? 48,828 #6 Posted July 26, 2021 (edited) 24 minutes ago, roadapples said: I was thinking 16 ???? Nawww you got CRS too 'Apples...... old as a goat you are..... it's a 1234 Squonky knows but where in the he double hockey's sticks is he when we need him? Mikey the chickens are fake they don't need feeding....... help this guy out! Edited July 26, 2021 by WHX24 2 6 Share this post Link to post Share on other sites
squonk 41,153 #7 Posted July 27, 2021 Autolite 216 4 2 Share this post Link to post Share on other sites
roadapples 6,983 #8 Posted July 27, 2021 Yup, that's what I meant... 3 3 Share this post Link to post Share on other sites
WHX?? 48,828 #9 Posted July 27, 2021 Yah.... & yer turn to eat mac & cheese off the dog spoon Jay.... 1 3 Share this post Link to post Share on other sites
953 nut 55,316 #10 Posted July 27, 2021 (edited) 12 hours ago, WHX24 said: Now Richard you know how some of the fellas feel about Chumponions. ... unfortunately I don't know the cross to others......Auto lite 36????? ..CRS..... Granted, this subject has been covered before (3,700 times) but why not sit down and hash it over again? https://www.wheelhorseforum.com/search/?q=spark plug&updated_after=any&sortby=relevancy&search_and_or=and Edited July 27, 2021 by 953 nut 2 1 Share this post Link to post Share on other sites
WHX?? 48,828 #11 Posted July 27, 2021 Here we go....not sure if this is right? Note how they cover their rears..... Spark plug cross reference (sparkplug-crossreference.com) 1 1 Share this post Link to post Share on other sites
WHNerd 8 #12 Posted July 27, 2021 Thank you all for the prompt response!!! 1 Share this post Link to post Share on other sites
WHX?? 48,828 #13 Posted July 27, 2021 Your Nerd...anytime... not often I get to on both Squonky and 'Apples in the same thread! 1 2 Share this post Link to post Share on other sites
clueless 3,004 #14 Posted July 27, 2021 1 hour ago, WHX24 said: Here we go....not sure if this is right? Note how they cover their rears..... Spark plug cross reference (sparkplug-crossreference.com) We will be waiting on tenterhooks till you let us know which one you go with . 2 Share this post Link to post Share on other sites
Crazyredhorse 295 #15 Posted July 27, 2021 Run these in harley good crack with throttle.they have iridium's good plug too.pricey though 2 Share this post Link to post Share on other sites
953 nut 55,316 #16 Posted July 27, 2021 11 hours ago, WHX24 said: ...not sure if this is right? Note how they cover their rears... The strange part is if you go to the application chart for each manufacturer of spark plugs for this same engine they seldom mtch the conversion charts. 1 Share this post Link to post Share on other sites
WHX?? 48,828 #17 Posted July 28, 2021 I agree Richard ... you thumb thru those books in the spark plug aisle it's like looking for a needle in a haystack and if you do luck out and find the correct one is it correct? We could go nuts here taking about heat ranges and electrode styles but most if not all of my big blocks have an H-10 and the smalls a CJ-8 with no issues. Heck a couple I even think I am running those cheapys they throw in with a gasket set. Those are good plugs Crazy... had some in a dual plugged shovel head once. Thing rocked but the other motor mods helped! 2 Share this post Link to post Share on other sites
squonk 41,153 #18 Posted July 28, 2021 As the make up of gasoline has changed over the years, The heat range recommendation for some engines have changed also. Depending on when a particular spark plug chart was printed when Jimbo was standing in the DIY'r at Quick Trip as compared to the chart "apples was looking at at Keystone Auto Parts, account for some of the discrepancy. 5 Share this post Link to post Share on other sites
WHNerd 8 #19 Posted August 3, 2021 Thanks again everyone, I went with the NGK's. Share this post Link to post Share on other sites
