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I have a load of those relays in my "workshop" , mostly made by Davall. they are probably still available from RS or CPC/Farnell The code on the yellow coil wrapper should give a clue to the configuration of the contacts. 185 is the resistance in ohms, 12 is the working voltage. I don't think I have...

Did you measure the resistance both ways round, just to make sure it isn't a diode?
I'd love to know.

And getting the decimal point one or two places out!!
All too easy - a picture's worth a thousand words, etc.

Great photos, wish I had the drive to do it..

Nomograms, don't you just love 'em...
I had to get the book out; the one I'm looking at relates torque factor to airscrew diameter to engine speed - perhaps I could fit a model aero-engine in front of the carb and get some boost that way..
Merry Christmas to all our readers (as they say).

A smear of UHU glue on the spigot?

Hi Alex,
If you've looked at last year's pictures you'll see our blue Sabre Six and I have to say that it qualifies as a well-used" example, nowhere near as clean as some (actually all) of the others on the Stand. Looks OK from a distance though!

As I understand it...I think the pre-load refers to the shims under the other two small bevel gears (Sun & planet?) which engage with the bevel gears on the inner ends of the half-shafts. If both sets of bevel gears were pre-loaded things could seize up. Also the half-shaft inner ends being splined ...

Rather than change to an electronic system I'd try to get things working "as is". If the points aren't pulling the coil -ve to ground when closed, you are almost there! If you measure between the spring blade on the points and any earth point and it always stays at 12v whether the points are open or...

I think the mechanical fuel pump relies on back-pressure to lift the lever off the cam, so if the fuel needle valve in the carb isn't seating properly you might be over-fuelling.

Nice result; well done.

Depends on how much clearance you have, but...
Could you use a small G Clamp to get behind it and squeeze it out by putting a tube on this side and a bit of turned-down rod on the other to locate in the roll-pin?
It only needs to push out enough to get a grip on?

Well, knock me over with a prickly cactus!!!
Looking again at the picture it looks nothing like a Sabra...

It might be that the +12v that goes to the points on a solder tag under the screw on the springy side of the points is in the wrong place and is not connecting to the springy bit. If I remember correctly, there's an insulated washer and possibly a nylon nut involved and two tag washers, one for the ...

We also say "a lot of play in the valve guides".
I think usual the solution is to fit new valve guides in the head and ream the holes to size. A better expert will be along shortly to explain why your machine shop man says it isn't possible.
Good luck.