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Need C-123 help guys!!!!

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Patrick Martin

03-03-2008 11:35:02




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Now I have another issue. I was cutting yesterday and verything was going just fine. I may have been cutting for maybe three or four hours, engine running perfect, govenor working perfect, etc.
I stop to disengage the PTO then as I release the clutch to move forward it died. I cranked and used the choke, etc, nothing.
Wait for a few minutes and the she fires up. hop on, put it in gear then let off the clutch and just as you heard the engine take the load it died.
I've got fire, I've got gas, I'm getting air..... ...what the heck????
Checked the valves, I'm still at .014" so thats good.
I checked to see if the timing looked right, rotated number 1 up to TDC on compression stroke, popped the cap, rotor is pointing to #1. Can't be timing I'd think, besides its a gear drive, I would have heard something before it konked out.
I pulled my distributor because I noticed about 3/8" rotational play back and forth. Looks like the pin that holds the gear has a little slack, not sheared but a little wiggle. I dont know if this is an issue but if so please let me know.
Could it be the valves not seating????? ? I'm thinking of pulling the head and re-lapping the valves. Its a fresh head rebuilt by myself. All new valves and hardened seats. I'm thinking that maybe I didn't lap them well enough?????
This is on my 100

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Patrick Martin

03-09-2008 17:54:54




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 Re: Need C-123 help guys!!!! in reply to Patrick Martin, 03-03-2008 11:35:02  
Well here is what I found out on the coil.

At some point the innermost set of windings must have suffered an impact or something. The wire was broken but still allowed some contact, thus giving me an OK reading.
As you can see in the above link, problem resolved :)

Link

Link

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Patrick Martin

03-08-2008 17:38:24




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 Re: Need C-123 help guys!!!! in reply to Patrick Martin, 03-03-2008 11:35:02  
Link



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Patrick Martin

03-08-2008 17:36:20




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 Re: Need C-123 help guys!!!! in reply to Patrick Martin, 03-03-2008 11:35:02  
Hey guys, I have a video of the lil squirt running now. Just figured out how to do it today so I hope you like it. I got allot of feedback in the sound for some strange reason so dont mistake it for a choppy exhaust or funky timing.
The problem was the coil. It tested perfect and was brand new but something failed. Good thing about it all is that I went ahead and installed a new set of points and condenser plus rotor and cap.

I still cant figure out how the dang coil shorted out. I'm doing surgery and taking a cutoff wheel tomorrow to it and have a look inside so I'll post some pics tomorrow of that. Maybe something interesting went on inside there that we could all see?
http://smg.photobucket.com/albums/v425/EZFEED/?action=view&current=EZFEED009.flv

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achodges1

03-03-2008 19:30:03




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 Re: Need C-123 help guys!!!! in reply to Patrick Martin, 03-03-2008 11:35:02  
Check the condition of the wire from the coil to the distributer point terminal. Had one once where the wire looked good but only made connection sometimes. When I checked the fire it was good, start it up and the vibration would break the connection and it would die.



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Don L C

03-03-2008 18:12:33




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 Re: Need C-123 help guys!!!! in reply to Patrick Martin, 03-03-2008 11:35:02  
Re-torque the intake manafold.....sounds like you have a vacuum leak ..... .



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El Toro

03-03-2008 17:25:17




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 Re: Need C-123 help guys!!!! in reply to Patrick Martin, 03-03-2008 11:35:02  
I would change the condenser. Never pull the head
when an engine quits, you need to use the process of elemination until you find the problem.
It could be stuck in 2 gears that's been mentioned. Did you have fire when it quit. You may have a weak coil. Pull a plug wire ASAP when it quits and check for fire to the plugs. If you have good fire you can rule out the coil. I don't think they even lap valves anymore at most auto machine shops. Hal

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gene bender

03-03-2008 16:57:30




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 Re: Need C-123 help guys!!!! in reply to Patrick Martin, 03-03-2008 11:35:02  
Are you sure your tranny isnt locked in two gearss cause you say it starts when you try to move it dies your shift lever mite be putting it in two gears. I would see if it backs up then dies. Those shift lever can easy get the tranny locked. Next time start and put in reverse and see if it backs up without killing the engine.



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Hugh MacKay

03-03-2008 16:49:47




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 Re: Need C-123 help guys!!!! in reply to Patrick Martin, 03-03-2008 11:35:02  
Patrick: Carburator or gas flow. Either you've got a gas flow restriction from tank or going into the carb. Could be the float or needle valve sticking. Can you save it from stalling with choke? I may not be right but those are worth checking.

Definitely not valves or coil. Valves wouldn't changes in a few min. Coil would be 30-45 min before it would fire up again. Could be points and condencer, they will sometimes act that way. Either that or gas flow.

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mkirsch

03-03-2008 16:11:54




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 Re: Need C-123 help guys!!!! in reply to Andrew Z, 03-03-2008 11:35:02  
Why is it that people jump right to the most invasive and least likely solution when something like this comes up?

Patrick, if it were the valves, it'd be clanking and clattering, whooshing and sucking, something like that. Check the simple stuff first. If it starts and runs, it ain't the valves.
The coil could have failed.

It could be a governor problem.



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