Pollack Pete 2,273 #1 Posted August 27, 2010 Trying to get my D-160 with 16 horse Onan twin to run a little better.Pulled the plugs.It had one Autolite and one Champion installed.I looked in my old Champion book but couldn't find what the correct plug is.Any ideas anyone?I went to our local Advance Auto.The kid there looked at me like I was from Mars.Thanks for any info. Share this post Link to post Share on other sites
TT-(Moderator) 1,129 #2 Posted August 27, 2010 The Autolite isn't by chance a #437, is it? I think I remember that from my Gravely days. :) Share this post Link to post Share on other sites
WH Raider10 17 #3 Posted August 27, 2010 I think you should be good to go with two Champion H10C spark plugs. Share this post Link to post Share on other sites
TT-(Moderator) 1,129 #4 Posted August 27, 2010 If you choose to use Champion plugs, the correct number for the B series Onan twins should be RH18Y H10s are for the Kohler (non-KT) twins. Share this post Link to post Share on other sites
bowtieguy 334 #5 Posted August 28, 2010 Last year I bought a couple plugs for my O-twin at the local parts store....just checked the box and they are Autolite 105.....not to say that they are the correct plug but that is what Napa's book called for....(thanks for reminding me to change them!!!) Share this post Link to post Share on other sites
wh79d160 52 #6 Posted August 28, 2010 I use NGK B-6L gap .025. I'm not a champion fan. I couldn't find the # listed for champion in my manual. Share this post Link to post Share on other sites
TT-(Moderator) 1,129 #7 Posted August 28, 2010 just checked the box and they are Autolite 105 For a P series Onan? (a 106 is supposed to be the RS17YX equivalent) Share this post Link to post Share on other sites
linen beige 14 #8 Posted August 29, 2010 just checked the box and they are Autolite 105 For a P series Onan? (a 106 is supposed to be the RS17YX equivalent) The D-160 with an Onan should be a B43G. My "D" manual calls for Champion plug type H-8 (Wheel Horse part #201336) and a gap of .25". Another thing to remember is the recommended point gap for this engine is .23" NOT .20". (cold timing of 25 deg. BTDC. Share this post Link to post Share on other sites
slufoot733 70 #9 Posted August 29, 2010 Anything but CHAMPIAN! I've had nothing but problems with them. Go with AC Delco, Autolite, or whatever. Share this post Link to post Share on other sites
linen beige 14 #10 Posted August 31, 2010 My "D" manual calls for Champion plug type H-8 (Wheel Horse part #201336) and a gap of .25". Another thing to remember is the recommended point gap for this engine is .23" NOT .20". (cold timing of 25 deg. BTDC. OOPS! The plug gap should be .025 and the points .023. It would take a whale of a coil to spark across a quarter inch plug gap! :USA: Share this post Link to post Share on other sites
