Morris Minor Owners Club

Mine uses N11yc

That's a VERY soft plug..... N9Y is the normal plug for standard engines.

ive never had any trouble with champion n9yc plugs

Currently using NGK BP8ES on a very well modified 1380, and no problems with them at all. Was on BP7ES and during the well-documented local overheating on No1 cylinder after the by-pass hose was removed (and subsequently restored!), we did have a couple of them burn out, but in retrospect this was nothing to do with the plugs at all.

What is very interesting in this post is the reference to BPR6ES. My elder son has recently bought an MGB GT, which when purchased had a known problem with the gearbox, so we could not drive it. The engine seemed to run very well, quiet, good oil pressure cold and hot etc. etc. After sorting out the gearbox (was empty of oil!!) and getting an MOT after being off the road with the PO for almost 2 years, he now finds that it will not pull past about 4,500 rpm. Carbs and ignition both checked and OK, and we noticed that it has BPR6ES plugs fitted with standard leads, and didn't know they were 'resistive', until now! So he has double resistance and probably not a lot of spark! He is off to get new plugs at lunchtime!!

Thanks for the new knowledge!

Yes - the double resistive is a real spark killer.

I've used both the Champion and NKG plugs mentioned on my Minors for years with no problems with either. It is only the occasional failed coil and the dodgy Mexican "Chilli-con-densers" that have given me problems! (The Mexican points didn't even fit !).

As many will be expecting..... It's 'never' the coil.........

Update on the 'B'. Julian has fitted NGK BP6ES and now it starts instantly and runs as it should! He was very disappointed with it after its MOT.

any one using N5 CHAMPION?

Can one still BUY N5s...? The long-nose plug proved to be so much more resistant to fouling - that it pretty much replaced the N5 type plugs 'overnight'

BMC you can buy the modern RN5C

this is one source

http://www.championsparkplugs.com/resul ... sWarning=1

Oh dear - why would you?

plus £17 a set on ebay

plus one of my books says N5 =NORMAL

N8 HOTTER and N3 COOLER

depending on type of driving

The 'projected core nose' plugs were developed in the late 60's as an improvement on the older designs. Of course you could use the original N5, but the later N9Y is a much better plug that works very well in a wider range of operating comditions.

I use Champion N5s and have had no trouble with them.I have about sixty that I bought from a boot sale a few years ago for a tenner.

I bought 4 NOS unused Champ N9Y plugs at a flea market for 25p each - happy day!

Hahahaha - ^^^^^^ that's my kind of deal!

short arms

Bit late to this topic.
I’m a little confused after reading all of the above. I’m hoping my issue is just down to the sparks…
I have only just found out that 3 sparks were NGK BP6ES and one of the sparks was NGK B6ES. (No P in it), they’re clearly different as the BP6ES protrude longer.
I found a spark plug conversion website, and the B6ES is the same as the Champion NA8 which is listed in the original Morris
Minor manual as being the plug to use.

So I guess I’m asking is, what do I use?

Champion N9Y spark plugs or equivalent should be used. Originally Champion N5 were used. Both set to 0.025" gap.
The type and heat range of plug used may be varied to suit the engine i.e. one cylinder is burning oil and fouling a N5 plug so a extended nose plug is used for that cylinder so that the nose of the plug is kept clean by burning off the oil resulting in a better sparking. All four plugs do not have to be the same grade and heat range.
Just be thankful that you do not run a BRM H16 which was started on cold plugs and went though several changes of plugs before it got to those used for the actual race.