Setting the timing on a distributor equipped 13B.
08-03-17, 04:35 AM
#1
Full Member
Thread Starter
Setting the timing on a distributor equipped 13B.
Apologies if this has been answered before, I've had a good search, but I can't find anything specific to the FC, and I don't know if Mazda adjusted anything between the FB and FC.
I'm going through the process of a major 'tune up' on my FC (NA), and I want to check the timing, unfortunately all the books and manuals describe checking it with a crank angle sensor, but we have a distributor on the UK models.
All I can work out from reading the manuals I have is that before doing it I need to bridge the green initial set coupler.
If anyone can give any advice on what I'm setting the timing to, do I use the light on the leading (I assume leading, but I don't know for sure) or trailing coil, and anything else I need to do, it'd be a great help!
Its the first time I've ever set the timing on a car so I'd rather not muddle through.
I'm going through the process of a major 'tune up' on my FC (NA), and I want to check the timing, unfortunately all the books and manuals describe checking it with a crank angle sensor, but we have a distributor on the UK models.
All I can work out from reading the manuals I have is that before doing it I need to bridge the green initial set coupler.
If anyone can give any advice on what I'm setting the timing to, do I use the light on the leading (I assume leading, but I don't know for sure) or trailing coil, and anything else I need to do, it'd be a great help!
Its the first time I've ever set the timing on a car so I'd rather not muddle through.
08-03-17, 08:26 AM
#2
Smells like 2 stroke.
A similar question was asked a while back. IIRC, the UK FC does not have an initial set coupler because it doesn't have electronic spark advance.
There should be two marks on the eccentric shaft pulley used to set the ignition timing. Originally they are yellow (leading, 5 degrees ATDC) and red (trailing, 20 degrees ATDC) for the front rotor. The marks might be hard to see, and the paint might be worn away or covered by dirt. Make sure the engine is at operating temperature and idling around 750rpm before you set the ignition timing.
Edit: Put your timing light pickup coil on the front rotor's leading spark plug wire, preferably as close to the spark plug boot as possible. If you set the leading timing off that wire, the trailing timing should automatically be set correctly unless the distributor has been modified internally.
There should be two marks on the eccentric shaft pulley used to set the ignition timing. Originally they are yellow (leading, 5 degrees ATDC) and red (trailing, 20 degrees ATDC) for the front rotor. The marks might be hard to see, and the paint might be worn away or covered by dirt. Make sure the engine is at operating temperature and idling around 750rpm before you set the ignition timing.
Edit: Put your timing light pickup coil on the front rotor's leading spark plug wire, preferably as close to the spark plug boot as possible. If you set the leading timing off that wire, the trailing timing should automatically be set correctly unless the distributor has been modified internally.
Last edited by DaBrkddy; 08-03-17 at 08:30 AM.
08-03-17, 03:20 PM
#3
Full Member
Thread Starter
A similar question was asked a while back. IIRC, the UK FC does not have an initial set coupler because it doesn't have electronic spark advance.
There should be two marks on the eccentric shaft pulley used to set the ignition timing. Originally they are yellow (leading, 5 degrees ATDC) and red (trailing, 20 degrees ATDC) for the front rotor. The marks might be hard to see, and the paint might be worn away or covered by dirt. Make sure the engine is at operating temperature and idling around 750rpm before you set the ignition timing.
Edit: Put your timing light pickup coil on the front rotor's leading spark plug wire, preferably as close to the spark plug boot as possible. If you set the leading timing off that wire, the trailing timing should automatically be set correctly unless the distributor has been modified internally.
There should be two marks on the eccentric shaft pulley used to set the ignition timing. Originally they are yellow (leading, 5 degrees ATDC) and red (trailing, 20 degrees ATDC) for the front rotor. The marks might be hard to see, and the paint might be worn away or covered by dirt. Make sure the engine is at operating temperature and idling around 750rpm before you set the ignition timing.
Edit: Put your timing light pickup coil on the front rotor's leading spark plug wire, preferably as close to the spark plug boot as possible. If you set the leading timing off that wire, the trailing timing should automatically be set correctly unless the distributor has been modified internally.
Thanks man. I'll let you know how I get on.
