Spark Plugs

[NC Bill]

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?

[coppercity]

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.

[NC Bill]

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?

[FastEddieB]

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,

[Tom Baker]

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

[coppercity]

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!.

[Jacques]

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 .

[NC Bill]

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.

[Tom Baker]

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.

[Runtoeat]

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?

[NC Bill]

Who is CPS?

[Flying Bozo]

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

[Flying Bozo]

OK thanks Roger.

Larry CTSW 255CT

[westcoastoz]

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

[Jim]

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.

[Mac Bowden]

50 hours oil and filter, 100 hours for plugs..... no issues.

[bitten192]

Same for me

 

Ernie

 

N192RA