3C Timing mark

Shamrock

Shamrock

Hero member
Location
Miami, Florida USA
Hey Guys, I'm stumped! I removed all the covers on the 3C to have them polished and now I can't get it to run right.  I tried adjusting the disk and no matter where I tighten the screws the timing marks remain at the same distance.  The 3 dots on the rotor is about an inch off of mark.  What to do?

timing%2Brotor.jpg
 
need to know what system you have, is it Bosch or DMC ?
has to be one of them with the Bosch rotor still installed

if you have a DMC, did you install the two lug ignition rotor on the correct way ?
 
Are you sure it still fires on all 3 pots?
I once had problems with a 3C too.
The ignition was oK and working as long as left alone.
After working on it the 40 year old cables
of a pickup gave up and it fired on 2 pots only.
Worth checking.

Ernesto
 
Ernesto said:
Are you sure it still fires on all 3 pots?
I once had problems with a 3C too.
The ignition was oK and working as long as left alone.
After working on it the 40 year old cables
of a pickup gave up and it fired on 2 pots only.
Worth checking.

Ernesto
Click to expand...

I know for sure it's firing on center and right side.  Will check left this evening.  Thanks
 
When you put the trigger sleeve back in, did it locate correctly? I recently made the mistake of not locating it properly in the slots on *1588* (trying to picture the setup here..) and my timing was out by ~an inch on the rotor.. It actually ran at some ridiculously advanced figure (~80deg): after repositioning the trigger sleeve on the crank correctly the timing returned to where it should be..

HTH

AndyW 8)
 
AndyW said:
When you put the trigger sleeve back in, did it locate correctly? I recently made the mistake of not locating it properly in the slots on *1588* (trying to picture the setup here..) and my timing was out by ~an inch on the rotor.. It actually ran at some ridiculously advanced figure (~80deg): after repositioning the trigger sleeve on the crank correctly the timing returned to where it should be..

HTH

AndyW 8)
Click to expand...

Thanks Andy, I will check it out this afternoon. I thought there was only one position for fitting the trigger sleeve. There's a hole on the crank and the allen screw on the trigger is screwed into this hole on crank.
 
Shamrock said:
Thanks Andy, I will check it out this afternoon. I thought there was only one position for fitting the trigger sleeve. There's a hole on the crank and the allen screw on the trigger is screwed into this hole on crank.
Click to expand...

Andy is talking about a different Bosch set up then what you have Shamrock, all you have to do is as you said, locate the grub screw into the hole in the crank end
early engines as his #1588 had a far different set up


 
redax5 said:
Andy is talking about a different Bosch set up then what you have Shamrock, all you have to do is as you said, locate the grub screw into the hole in the crank end
early engines as his #1588 had a far different set up
Click to expand...

I see.. Thanks for this Red, does that imply the rotors changed at some point as I recall the slots to locate the trigger sleeve were on the boss adjacent to the key way (or thereabouts..).

 
I'd suppose the slot/spring setup disappeared when the grub screw came into play. ;) When changing over to the DMC I had some belt and braces on mine as I do not wanted to grind a nasty hole in my crank journal. Kept the slot/spring to locate the trigger sleeve, grinded of the tip of the grub screw and put some loctite on the grub screw to keep it in place. However, this required to rotate the alternator coil plate (or however this thingy is named in english) to fully retarded position to get the ignition timing back to 32? BTDC.

Shamrock, if I understand it right you checked ignition timing with a stroboscope and it is way off? If so, you might have put the trigger sleeve back on the crank in reversed position (inside out). Or the aternator coil plate sits not in the same position as before and needs therefore adjustment. However, AFAIK the adjustment range of the alternator coil is less than one inch, so maybe a combination of both?
 
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