Thanks for all the responses below, I probably wouldn"t venture into setting timing and adjusting points without the help of this forum, the manuals don"t always explain it simply enough for me to follow. So thanks. Anyway, next question, FO-4 says "Move the stationary contact point as necessary to obtain air gap 0.0024-0.0026 inch", Operator manual says to insert distibuter adjusting wrench No. 12150-A in adjustment openings and turn proper direction to .024-.026. Everywhere else I"ve seen confirms.025 instead of .0025 so I"ll assume the F0-4 is a misprint. But, what exactly am I adjusting to achieve the proper gap and what do I use? Also, FO-4 shows direction of spin CW for the sidemount in Fig. FO86, but the firing order on mine seemed to indicate CCW. Which is correct? BTW, '50 8n side-mount for those who didn't see the earlier post.
- Thread starter Cooter143
- Start date
"what exactly am I adjusting to achieve the proper gap and what do I use"
You are adjusting the gap between the contacts on the end of the points
while the rubbing block is on the high point of the lobes.
It is recommended that you check it on each of the four lobes.
You adjust the gap by moving the lower plate of the points. Leave the mounting
screws slightly loose, and then turn the oblong screw to move the plate until
you get the .025 gap, then tighten the mounting screws and re-check the gap
to make sure it didn't move while tightening.
All you need to do this is a screw driver and a feeler gauge.
When you're done, clean the contacts with electrical contact cleaner or similar
to make sure you didn't get oil on them from the feeler gauge, and all the
shipping oil is removed.
Burnish the contacts with a piece of card stock or brown paper bag.
One last check, make sure the contacts close squarely and line up with
each other. This is a bigger problem with cheap points than it is with good
ones, but it can happen on any of them.
You can bend them slightly to get them lined up good, but if you do
recheck the gap to make sure it didn't change.
You are adjusting the gap between the contacts on the end of the points
while the rubbing block is on the high point of the lobes.
It is recommended that you check it on each of the four lobes.
You adjust the gap by moving the lower plate of the points. Leave the mounting
screws slightly loose, and then turn the oblong screw to move the plate until
you get the .025 gap, then tighten the mounting screws and re-check the gap
to make sure it didn't move while tightening.
All you need to do this is a screw driver and a feeler gauge.
When you're done, clean the contacts with electrical contact cleaner or similar
to make sure you didn't get oil on them from the feeler gauge, and all the
shipping oil is removed.
Burnish the contacts with a piece of card stock or brown paper bag.
One last check, make sure the contacts close squarely and line up with
each other. This is a bigger problem with cheap points than it is with good
ones, but it can happen on any of them.
You can bend them slightly to get them lined up good, but if you do
recheck the gap to make sure it didn't change.
In the front mount distributor on the 9N/2N and early 8N, as in the first pic.
Guess I got a little off topic, hope I didn't confuse anyone too much.
On the later 8N/Jubilee you will just have an opening to insert a screwdriver
and move the points until you reach the proper gap as in the second pic.
Concept is still the same, slightly different adjustment method.
(both pics swiped from YT)
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