P Mag with Autoplugs?

Selmax · #1 10-13-2012, 12:56 AM

What type of auto spark plugs are you guys using ?
I am preparing the installation of dual Pmags on my O320 (RV9a). I followed the recommendation to buy the Pmags with a set of autoplug adapters but have no clue which plugs to buy. Thanks for you advice

Pit

SmilingJack · #2 10-13-2012, 06:38 AM

I have an IO360 and went with the recommended. Some people are using a hotter plug.

NGK
BR8EIX-6747 Iridium
BR8ES-3961 REG

Both of those plugs have the solid top, non screw on.

Walt · #3 10-13-2012, 07:41 AM

Denso also make excellent plugs, the IK27 (5312) iridium works very well with my lightspeed.

tommylewis · #4 10-13-2012, 08:18 AM

I have used NGK BR8ES auto plugs in my RV7a with dual PMAGs for the last 5 years and 1005 hours. I change them every annual condition inspection. Last ones purchased for $2.49 each

Ironflight · #5 10-13-2012, 03:06 PM

BR8ES's in our two P-Mag airplanes - if you can, get the ones with the solid ends, rather than the screw-on ends. I forget the model number (for the solid ends) right now, but Roackauto.com has had the best prices.

Paul

Mile High Relic · #6 10-13-2012, 04:43 PM

The solid top BR8ES are part # 3961, as John M noted. I just picked up 8 at Advance Auto Parts for $2 each. They list at $2.49, but if order on-line you can get 20% off using a discount code (P20). In store pick up was easy, and I needed to get a headlamp for my car anyway.

I noticed though that there is a picture on the spark plug box. It is tiny, and it took me awhile to figure out what it was showing. I finally realized it is a picture of an airplane and an ultralight with a red "X" through it.

Selmax · #7 10-14-2012, 06:05 AM

Thanks! Most (?) of you are flying 360's. Does a BR8ES-3961 work in a O320 D1A (160HP) ?
Pit

Ironflight · #8 10-14-2012, 06:30 AM

Quote:

Originally Posted by Selmax

Thanks! Most (?) of you are flying 360's. Does a BR8ES-3961 work in a O320 D1A (160HP) ?
Pit

We are using them in our TMX-IO-320 (160 HP) with no issues.

penguin · #9 10-14-2012, 04:18 PM

Quote:

Originally Posted by Selmax

Thanks! Most (?) of you are flying 360's. Does a BR8ES-3961 work in a O320 D1A (160HP) ?
Pit

Works fine in my O-320-E2D with 160hp cylinders

Pete

N941WR · #10 10-14-2012, 08:03 PM

Pit,

Try using the search function. This question comes up regularly.

I use the regular BR8ES?s and replace them every annual, total cost is under $17 USD.
Follow the instructions in the Emag manual for installing the plugs. Use high quality anti-seize compound on both the plug and the adapters.

Quote:

Originally Posted by Emag Manual

First, install adapters with the supplied gasket on
the spark plugs finger tight. Then, insert the combined
assembly (plug with adapter) in the engine and tighten to
18 ft/lb (standard auto plug torque).