NC Bill Posted February 15, 2011 Report Share Posted February 15, 2011 I see in my log book that the Rotax uses a DCPR8E plug gaped .028. Does that sound right? Where's the best place to get them? Link to comment Share on other sites More sharing options...
coppercity Posted February 15, 2011 Report Share Posted February 15, 2011 Hi Bill, I get mine at Aircraft Spruce and change them every 75hrs. You can go longer on them, but at the price I just throw them them away at 75hrs. I use my airplane for rental and instruction though and want to make sure my clients don't have any trouble. You can also gap them a little tighter especially for cold weather starting. Link to comment Share on other sites More sharing options...
NC Bill Posted February 15, 2011 Author Report Share Posted February 15, 2011 Thanks Eric. Just looked at their website. Seems the DCPR8E comes in 2 flavors: solid terminal nut and removable terminal nut. Which one works best in our planes? Link to comment Share on other sites More sharing options...
FastEddieB Posted February 15, 2011 Report Share Posted February 15, 2011 My ROTAX absolutely requires the removable terminal nut - but check to see what kind of caps you have. BTW, my local Advance Auto parts got me the plugs for about $2 each, though on the first try they got the welded terminal nut and I had to have them reorder, Link to comment Share on other sites More sharing options...
Tom Baker Posted February 15, 2011 Report Share Posted February 15, 2011 NGK stock number 4339. I get mine from NAPA for around $3.00 each. I let mine run longer than 75 hours, and have never had any trouble, knock on wood. If you are going to change them make sure you get some heat compound paste. all you will need is a small tube. Tom Link to comment Share on other sites More sharing options...
coppercity Posted February 15, 2011 Report Share Posted February 15, 2011 Good point on the heat paste. As Roger L. Tells me all the time...use it sparingly and don't get any on the electrodes, the heat of combustion won't burn it off!. Link to comment Share on other sites More sharing options...
Jacques Posted February 16, 2011 Report Share Posted February 16, 2011 I see in my log book that the Rotax uses a DCPR8E plug gaped .028. Does that sound right? Hi right number but wrong gap.. It ''used to be'' .028'' recommneded but now it is .023/.027'' section 14.2.2) of Line Maintenance Manual even down to .020'' for better cold starting . Link to comment Share on other sites More sharing options...
NC Bill Posted February 16, 2011 Author Report Share Posted February 16, 2011 I notice you fly an 80hp ROTAX so not sure if there's a difference between that and the 912-ULS 100hp ROTAX. Went to the ROTAX website and looked at the MX Manuals for the 912 and I can't find any mention anywhere of the gap tolerance on any manuals or revisions. Can someone chime in. Link to comment Share on other sites More sharing options...
Tom Baker Posted February 16, 2011 Report Share Posted February 16, 2011 I notice you fly an 80hp ROTAX so not sure if there's a difference between that and the 912-ULS 100hp ROTAX. Went to the ROTAX website and looked at the MX Manuals for the 912 and I can't find any mention anywhere of the gap tolerance on any manuals or revisions. Can someone chime in. Check out page 64 in the Line Maintenance manual .023-.027 for the gap. Link to comment Share on other sites More sharing options...
Runtoeat Posted February 17, 2011 Report Share Posted February 17, 2011 Good info on the spark plugs for both source and electrode gap. I'll have to see if my Advance Auto Parts or my NAPA stores can get these. Looks like asking for NGK stock #4339 that Tom supplied is what we're shooting for. I know that just asking for the DCPR8E won't insure that one will get the plugs with removable nut. Hopefully, this stock numbers will result in getting the plugs with removable electrode nut. Fast Eddie, do you have the stock number that the Advance Auto store used for the plugs with the removable nuts? Link to comment Share on other sites More sharing options...
Roger Lee Posted February 17, 2011 Report Share Posted February 17, 2011 Just get them from CPS. No muss, no fuss. Link to comment Share on other sites More sharing options...
NC Bill Posted February 20, 2011 Author Report Share Posted February 20, 2011 Who is CPS? Link to comment Share on other sites More sharing options...
Roger Lee Posted February 20, 2011 Report Share Posted February 20, 2011 CPS is California Power Systems in San Leandro, CA. Next to San Francisco. They are a Rotax distributor. Here is their web site: http://www.800-airwolf.com/ You can have them send you a catalog or go right there on line and order. If you have any questions about parts or Tech issues you can talk to Jeremy. The catalog is nice because it has blow up engine diagrams so it makes it easy to order parts by the correct Rotax part number. Jeremy has this hose replacement parts list, too. Link to comment Share on other sites More sharing options...
Flying Bozo Posted February 13, 2012 Report Share Posted February 13, 2012 Spark plugs 912ULS what is the correct plug, Spruce list 2 of them: 08-01228 NGK DCPR8E SPARK PLUG $3.35 08-07044 DCPR8E NGK SOLID RESISTOR PLUG $2.90 I think the first on is the correct one but don't know. Can anyone tell me? Thanks, Larry Link to comment Share on other sites More sharing options...
Roger Lee Posted February 13, 2012 Report Share Posted February 13, 2012 Hi larry, It is the NGK DCPR8E, your first choice. Link to comment Share on other sites More sharing options...
Flying Bozo Posted February 13, 2012 Report Share Posted February 13, 2012 OK thanks Roger. Larry CTSW 255CT Link to comment Share on other sites More sharing options...
westcoastoz Posted March 1, 2012 Report Share Posted March 1, 2012 I am interested to know at what intervals most people change their spark plugs. I have been changing mine at around 75 hours....is this more or less than the average? Any input appreciated. Dave Link to comment Share on other sites More sharing options...
Roger Lee Posted March 2, 2012 Report Share Posted March 2, 2012 Hi Dave, Your good at 75 hrs. Some push it up to 100. Link to comment Share on other sites More sharing options...
Jim Posted March 2, 2012 Report Share Posted March 2, 2012 I used to change my oil and plugs at 50 hours until someone made a stink about owners not being approved to do that. Now they get changed at 100 hours. Still look great. Link to comment Share on other sites More sharing options...
Safety Officer Posted March 2, 2012 Report Share Posted March 2, 2012 You are allowed to do preventative maint or maint approved for the owner by the aircraft MFG which usually follows the FAR's and is described in the FAR's. Link to comment Share on other sites More sharing options...
Mac Bowden Posted March 2, 2012 Report Share Posted March 2, 2012 50 hours oil and filter, 100 hours for plugs..... no issues. Link to comment Share on other sites More sharing options...
bitten192 Posted March 3, 2012 Report Share Posted March 3, 2012 Same for me Ernie N192RA Link to comment Share on other sites More sharing options...
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