960 electrical update

WayneIA

Well-known Member
10 days -two week ago I posted about a distributor problem on a 960. The distributor is junk! Why? I have not ideal why electricity will not Go through the cap to the plugs setting on this particular distributor casting with shaft. My 641 stood up well as a "test tube baby" LOL. I do know that a dab of gun grease on the end of the dist shaft will hold the oil pump drive shaft in place, The timing marks on the fly wheel show up with number 4 cylinder at top dead center, And the plastic parts on the top of the distributor generally don't fit with out swear words. LOL. Imported junk!!!I have blown enough steam.. Have a Happy New Year everyome
 
You have my sympathies, Wayne.

I avoid aftermarket parts like the plague.

BTDT.

Dean
 
The timing marks on the fly wheel show up with number 4 cylinder at top dead center

Shouldn't they show up when the number 1 cylinder is at top dead center, not when the number 4 cylinder is? Are you sure it was on the compression stroke of number 4, not the exhaust stroke?
 
(quoted from post at 09:27:41 01/01/17)
The timing marks on the fly wheel show up with number 4 cylinder at top dead center

Shouldn't they show up when the number 1 cylinder is at top dead center, not when the number 4 cylinder is? Are you sure it was on the compression stroke of number 4, not the exhaust stroke?

Isn't #1 on TDC at the same time???? Now . . . if he's saying #4 is at TDC at the end of the compression stroke . . . then he's got problems!
 
Happy New Year ti you too, Wayne!
Did you ever go back and examing for the breaker cam not being properly timed/aligned with the rotor?...and the possibility of CCW vs CW advave assembly?
What Soundguy & my self were getting at, is that if you have a distributor post at 12, 3, 6, 9 o'clock positions & due to a mechanical alignment problem, the points open/coil fires all just fine, but rotor is at 1:30, 4:30, 7:30, or 10:30, there is a very good chance that the spark will not make it from rotor to post.....just too big a gap to jump. Often when bench testing a distributor & the person for whatever reason is turning the distributor in the wrong direction, he will complain that no spark is making it to the plug posts. When turning in wrong direction, the points are opening away from intended position by the amount of the dwell, or with rotor about 35 degrees away from a post! The cam, advance mechanism assembly & relationship to shaft can be wrong, have slipped at a crimped joint, be assembly of wrong parts, etc. and be the cause of points opening in wrong relationship to the rotor position. You should see how badly wrong some of these Chi-com advance assemblies have been made & sold!
Given all that Wayne has swapped & not swapped and the fact that it has no known history of running with 'bad' distributor, I expect that someone installed the wrong advance mechanism in that distributor. That is, one intended for CCW rotation instead of CW rotation, thus (as I explained above) will result in firing somewhere between two cap plug towers. Relatively certain that the 8N adv mechanism installed in his distributor will achieve this undesirable result.
A visual will verify or dispel my idea (weights turn in direction to "dig" vs "flow").
http://s192.photobucket.com/user/JMOR_photo/media/Ign/distr_advance_weights.jpg.html
 

Isn't the firing order 1,2,4,3? Then 1 and 4 might be the same. I've forgotten most of what I once knew about gas motors. To complicated.
 
(quoted from post at 12:06:52 01/01/17)
Isn't the firing order 1,2,4,3?[ Then 1 and 4 might be the same./quote]

Yes, but the procedure calls for setting number 1 at TDC of compression stroke. He just said that number 4 was at TDC, but not which stroke, so I was asking to be sure.
 
If I remember right #1 and #4 will both be at TDC at the same time but #4 on exhaust and #1 on the fire timing.
 
Sometimes in situations like this, I wander if I actually did what I thought I did. During 59 years of marriage to the same gal, I have been right a "couple" of times, Thus I just went and looked, and yes the cam and weight assembly is the right one.. I have dealt with that situation twice. Once I created myself( never install points with a timing light) and the second I found.(experienced now).LOL But they both did run. The timing marks on a 100 series flywheel appear in the window with Number 4 cylinder on compression stroke TDC. "don't argue" LOL Don't know if I will actually find the exact problem. There are several other thing that need attention on this tractor. "Coarse I guess I got all winter. We shall see!!!
 
The above statement should say "never install points without a timing light". Light will show spark retarding with wrong cam and weight assy
 
(quoted from post at 16:55:35 01/01/17) The timing marks on a 100 series flywheel appear in the window with Number 4 cylinder on compression stroke TDC. "don't argue" LOL

Hmm. I would not have thought there'd been a running change, I've timed my late '62 4000 with a light on #1. Marks were right where they should be on it.
 
(quoted from post at 21:04:24 01/01/17)
(quoted from post at 16:55:35 01/01/17) The timing marks on a 100 series flywheel appear in the window with Number 4 cylinder on compression stroke TDC. "don't argue" LOL

Hmm. I would not have thought there'd been a running change, I've timed my late '62 4000 with a light on #1. Marks were right where they should be on it.
hink about it, the timing marks will appear in the window when #1 TDC_COMPRESSION, #1 TDC-Exhaust, #4, TDC-compression, #4, TDC-exhaust.
 
(quoted from post at 18:18:25 01/02/17)
(quoted from post at 21:04:24 01/01/17)
(quoted from post at 16:55:35 01/01/17) The timing marks on a 100 series flywheel appear in the window with Number 4 cylinder on compression stroke TDC. "don't argue" LOL

Hmm. I would not have thought there'd been a running change, I've timed my late '62 4000 with a light on #1. Marks were right where they should be on it.
hink about it, the timing marks will appear in the window when #1 TDC_COMPRESSION, #1 TDC-Exhaust, #4, TDC-compression, #4, TDC-exhaust.

By golly! Hadn't thought that out, had I?
 
When the timing marks on the cam gear and crank gear are lined up it will be on compression stroke TDC at NO 4. Right? Probably been 5 your 6 years since I have been there. Getting too deeply involved with is thing. And yes, TDC at the timing hole can be with NO1 or NO4. Spark plug wiring doesn't care how it looks.
 

The only four cylinder engine I've seen that timed on #4 cylinder was in a IH Scout.
My shop manual says to set the dist in with #1 piston at TDC on the compression stroke, if you've got it set on #4 TDC compression stroke it's 180 out.
 
So what position should the distributor rotor be pointing, cap setting,or wires running? The distributor with cap will rotate 360 degrees, excluding the wire limitation. I chose to put the distributor in with the rotor pointing at the post with the wire running to NO 4 cylinder on compression stroke TDC I'm thinking that's the way you would find the crank when aligning the crankshaft and camshaft marks behind the timing cover. I might be wrong on this. I have 3 distributors. 2 of them run it, one doesn't. I probably will never will find out why. Anybody want to play with a distributor?
 

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