Plugs

[les]

I bought some Bosch plugs yesterday, seems China make them, along with everything else. It indicates they are not suitable for light aircraft or powered hang gliders. Maybe they are not too sure of their product?

[bmcecosse]

[SteveClem]

Years ago we trusted brand names.... Now they are meaningless unfortunately.

[simmitc]

Even the latest Champion plugs are made in France - and they've changed the numbering system. I've always said that Champion are the best plugs for a Minor, but (without stereotyping in any way at all ) I don't want the engine smelling of garlic and trying to jump to the wrong side of the road

[les]

I've preferred champion plugs over the years as well, still do but my recent purchase was not for my Minor!

[philthehill]

Does the ignition system have to conform to certain standards/quality control that are set by the governing body (i.e. Civil Aviation Authority) for flying which may be of a standard set higher than that for use in motor vehicle engine?
If a plug fails in the car it is of little consequence but if it fail in a light aircraft or similar it is of no small consequence.
Phil

Note:
Car manufactures used to make their own plugs.
I have in front of me a 18mm spark plug made by Renault FRERES BTES S.G.D.G. BILLANCOURT.
It is unusual in that it has eight spark points set around the central core arcing to the plug body.

[les]

I expect you're right Phil, regarding higher spec for leaving the ground! Which makes me wonder how much a aviation plug would cost!

[philthehill]

http://www.ebay.co.uk/itm/12-Champion-A ... 25a671ac29

£88.29 each!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

http://www.ebay.co.uk/itm/RAF-Aircraft- ... 20e428bfe4

They have the same type of fittings as those fitted to my Ser3 FFR (fitted for radio) Landrover engine i.e. have anti interference HV cable and they cost a fortune to replace.

http://www.ebay.co.uk/itm/GENUINE-CHAMP ... 234e7b6f07

[GBond]

It's 88.29 for the dozen, not that bad actually but it would probably be hard to find the correct thread/heat range.

I've also seen modern cars come with spark plugs with up to four points, but I would still be wary of using those in a Morris since if designed for a modern car I imagine they're probably less resistant to variations in the air/fuel mixture.

[smithskids]

Lodge plugs used to have multi electrodes on them.

[philthehill]

http://www.ebay.co.uk/itm/Golden-Lodge- ... 35d1edf176

[TFM150K]

[TFM150K]

Forgetting about the stickers, we are getting onto dangerous ground here, venturing into the world of "spark plug collectors"!!!!

[mike.perry]

I have a tin of assorted old plugs, Lodge, KLG, multi point, 18mm, D10s on my Vedette marine engine, FFR plugs on my spare ex WD engine etc. I still have not worked out how to get the spark plug out of my lawn mower!

[GBond]

I found this old Bosch plug on a BSA I'm restoring.[frame][/frame]Didn't know Bosch had ever produced plugs in Guatemala, from the looks of it and the bike's history it's probably from the 60's or early 70's. (And still looks like it would work)