The Marston Sunbeam Club & Register Forum

General Category => Technical Discussion Forum => Topic started by: Thomas on April 15, 2020, 02:52:36 PM

Title: Spark plug thread
Post by: Thomas on April 15, 2020, 02:52:36 PM
Hi all!

I just discovered that my B7HS spark plug has a much shorter thread than my cylinder head. I wonder if B7ES (E = long thread) is the correct choice. And are these plugs non-resistor plugs?

Cheers, Thomas
Title: Re: Spark plug thread
Post by: phutton on April 16, 2020, 12:26:47 PM
A lot of members do use the longer-nose plug - give it a try!

P.
Title: Re: Spark plug thread
Post by: Thomas on April 22, 2020, 05:53:20 PM
Today I got the new NGK plug B7ES. Was a bit of work to get rid of the old burned stuff at the lower threads but it's now a big improvement. Idle is significantly more stable than before.
Cheers, Thomas