The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Lucas, Ignition, Charging, Electrical => Topic started by: dave st cleer on 29.08. 2013 22:08

Title: cooked plugs
Post by: dave st cleer 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?

Title: Re: cooked plugs
Post by: a10 gf on 29.08. 2013 23:22

101% Sure the timing is correct ? Or is it running lean ?

Title: Re: cooked plugs
Post by: renos-a10 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.

Title: Re: cooked plugs
Post by: muskrat 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