Author Topic: cooked plugs  (Read 500 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, '76 XT500, '77 AG175 '83 CB1100F, '81 CB900F project.
Australia
Muskys Plunger A7