Author Topic: cooked plugs  (Read 523 times)

Offline dave st cleer

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cooked plugs
« on: 29.08. 2013 22:08 »
Hi everybody any sugestions appreciated ,having problems with an old 1959 Norton Dominator now fitted with 12 volt boyer electronic ignition that keeps cooking up NGKBP6ES plugs. Can anybody recommend a change to rectify this problem?

Offline a10gf

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Re: cooked plugs
« Reply #1 on: 29.08. 2013 23:22 »
101% Sure the timing is correct ? Or is it running lean ?

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Offline renos-a10

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Re: cooked plugs
« Reply #2 on: 30.08. 2013 07:24 »
Hi Dave,
 
 I agreed with A10f .... is it running lean? Check it and my opinion is to charge plug BP8ES.Maybe is the weather the problem.
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Online muskrat

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Re: cooked plugs
« Reply #3 on: 30.08. 2013 14:57 »
G'day Dave.
The std plug for it is a B6ES so is not protracted. Explain how they look or post a picture of them.
A colder plug B7 or B8 might help. Also the Boyer needs 12 volts or more. I know they say it will run down to 8 volts but I've found any less than 12 it starts to advance the timing.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7