40+ won't start

[headdownarseup]

I'd almost be half tempted to put that flywheel back onto a known working baseplate and try it out.
See if the magnetism improves at all after a few minutes of running!

Going by the pics it definitely looks like a seagull flywheel to me.
As said before, in my experience the magnetism is normally very good with most of these, it's the cam that can wear out leading to all sorts of trouble when trying to re-gap the points.

March 1959 as a date. (do you see how easy it is to pick out the date now)
R82 A80 seem to be a generic Villiers number.

George
This 40 plus of yours, is it an SJP by any chance?

Jon

[Charles uk]

How many magnets do yours have Jon?

This could this be a 4 stroke flywheel.

[ingram19582002]

Yes Jon its number is " sjp 18274 " and ive spun it with a drill and left a very very strong magnet on it overnight still no joy, its up to the experts now, ps it looks identical to the 2 that Tam gave me...

[tambikerboy]

Have you had a good look at the inside particularly at magnets. ....looks different to me china

[Collector Inspector]

Perhaps check the polarity of the small magnet?

They can be removed............

Just a thort aye.

BnC

[headdownarseup]

How many magnets?

3

1 Larger one
2 smaller ones

Identical in the older flattop flywheels too.

Is there a better close up pic of the cam?

Yes, the magnets are removeable provided you can release the screws. As Bruce has pointed out it's possible the polarity might have been reversed.
I'd need a closer look at this to say yes or no.

Jon

[Charles uk]

Reversing the magnet polarity doesn't make any difference on this style magneto it only causes problems on a CDI.

Flywheels are balanced, removing a magnet might not be a clever idea!

[headdownarseup]

Removing magnets from a flywheel is not a good idea, you're right Chas.

But there are people out there that do it all the same!
WHY





Jon

[tambikerboy]

Flywheel knackered lost its magnetism spun up ok though 3 times around my head then let go. An archeologist might find it in years to come should keep him busy

[ingram19582002]

well Tam i was out all day on my dinghy I on theTay with you're flywheel on the 40 + and it went great, not a problem all day. Used almost a whole tank of fuel. On the fishing front It was the same old story though " the one that got away" Thanks again to all on the forum. cheers ,George.

[headdownarseup]

Nice to know the problem is finally sorted.

That's a new one with me, flywheels losing magnetism. I suppose it can happen though.

Jon