spark plug for a WF

Patrick Hubbell · Posted: Wed Dec 30, 2009 10:56 am Post subject: spark plug for a WF

what brand and plug number do you use in a briggs world formula engine?
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Patrick Hubbell

michael schorn · Posted: Wed Dec 30, 2009 12:53 pm Post subject:

Patrick
Stock Champion RG4HC copper core. $3-5 each
I have been using the NGK CR9EIX or CR10EIX Irridium you will need to buy the terminal caps for these. $7-10 each
Serveral guys are using the ND 24ESR, ND27ESR or ND31ESR I believe you need to buy the terminal cap for these also. $5-10 each

All of the plugs work well and last a good long time since the switch to the PVL ignition.

Almost all of the manufactures now make 10mm copper core plugs too which I have used some of the Autolite 4302 and 4303 you will need to buy the terminal caps for these also. $2-4 each

Hope this helps
Mike
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Steve Nieto · Posted: Wed Dec 30, 2009 5:45 pm Post subject:

NGK CR7, 8 or 9 depending on the the air temp and fuel. $ 2.99 at the Honda MC shop.