ignition timing

laxy · Post by **laxy** » Fri Aug 13, 2010 10:52 pm

AS 1608 says valve timing doesnt alter but if you are going to check anyway be aware that the dot on the small timing pinion is obscured by its stepped washer.The nut is usually tight and involves removing the clutch plates and locking the clutch with a home made tool constructed from an old plate in order to undo it

iandusud · Post by **iandusud** » Thu Dec 02, 2010 8:58 pm

Out of interest why should the timing be set for the r/h cylinder and not l/h?

Ian

Malleon · Post by **Malleon** » Thu Dec 02, 2010 9:09 pm

quote:
Out of interest why should the timing be set for the r/h cylinder and not l/h?

Ian

Probably because the right hand cylinder is 'leading', as on 2-cyl. steam locos.
Eric will know !!
Best regards.

1608 · Post by **1608** » Thu Dec 02, 2010 9:45 pm

There are two lobes on the cam ring in the Mag. I BELIEVE that the Mag is 'timed' so that the lower of the two lobes relates to the r/h cylinder. It therefore follows that the top lobe relates to the l/h cylinder, but I don't see any reason why the proceedure for setting the timing can't be done by using top lobe and l/h cyl.
By the way, did you sort out the rough running ?

alanjennings · Post by **alanjennings** » Fri Dec 03, 2010 5:56 pm

In my limited experience of mags. you can time the b====y things on either cam-but they are never the same no. of degrees! You have to compromise, like most things in life!

wilko · Post by **wilko** » Fri Dec 03, 2010 6:57 pm

While you have the timing cover off you can entertain yourself by watching the oil sneak out around the oil pump spindles! Although you might have to run your motor first with that cold spell over there.