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This VAC is driving me nuts.

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old
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Joined: 12 Mar 2000
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Location: Lake of the Ozarks area of MO

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PostPosted: Fri May 07, 2021 12:25 pm    Post subject: This VAC is driving me nuts. Reply to specific post Reply with quote

Been trying to get this 1949 VAC back up and running and it is fighting me hard then I am fight it. It will hit and kick the start out and maybe run 2 or 3 seconds then die. Thought it might be the carb so I took the carb off another one I have that runs fine and that didn't help. I'd try pull starting it but that is hard to do your self. I've tried to adjust the timing and that doesn't do it either. Has new points in it gaped at 0.020.

What am I missing??
 
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chuck machinist
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Location: chesapeake va.

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PostPosted: Fri May 07, 2021 2:26 pm    Post subject: Re: This VAC is driving me nuts. Reply to specific post Reply with quote

I fought a similar issue with the DC . You have one or two issues that you overlooked on the carb. A passage obstructed, or a float not set just right, or a needle not seating completely. One by one , replace , or reset each component. to factory setting. A good drawing of the carb helps . My email is open. I feel your pain. By the way, I replaced the bottom half of my Zenith with a known good one, and the old girl came to life!. I pitched the old one to the trash.Take a breath, and walk away for a day. It will come to you! CM

 
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old
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PostPosted: Fri May 07, 2021 2:49 pm    Post subject: Re: This VAC is driving me nuts. Reply to specific post Reply with quote

I've switched carbs for another VAC I have and the one I switched with runs just fine with either carb so pretty sure it is not either one of the carbs.
 
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LPakiz
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PostPosted: Fri May 07, 2021 3:44 pm    Post subject: Re: This VAC is driving me nuts. Reply to specific post Reply with quote

Old,
Couple months ago, my son couldnt make the SC run for more than a few seconds. Seems it would run as long as he held the starter button down, and let the starter whirl. Soon as he let off the starter button, it would quit.
After changing the starter push button, he had wired the the ignition onto the starter side of the starter button, instead of the supply side from the on-off switch. As long as tge starter was energized, so was the coil. Switched the wire, fired right up.
Have you (or a previous owner) moved any wires around lately?
 
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J Hamilton
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PostPosted: Fri May 07, 2021 4:11 pm    Post subject: Re: This VAC is driving me nuts. Reply to specific post Reply with quote

Have you tried a different condenser? A known good one, we all know the problems newer ones are. Or swap the distributor out from the other one that runs to see if that's the problem
 
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RJKeith
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PostPosted: Fri May 07, 2021 4:18 pm    Post subject: Re: This VAC is driving me nuts. Reply to specific post Reply with quote

Have you pulled the fuel line to make sure you are getting good fuel flow? Had a 300 that had sat a year or so and all sorts of stuff in the tank, fuel cut off, and line kept clogging things up.
 
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old
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PostPosted: Fri May 07, 2021 4:19 pm    Post subject: Re: This VAC is driving me nuts. Reply to specific post Reply with quote

The condenser is who knows how old as in I have not changed it. I have a good spark that jumps a 1/4 inch gap or more. This has sat a long time as in at least 2 years since I got it and when I got it it had sat a long time.
 
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old
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PostPosted: Fri May 07, 2021 4:22 pm    Post subject: Re: This VAC is driving me nuts. Reply to specific post Reply with quote

I have this one hot wired since the wiring is a mess and once I have it running I'll do the wiring but till it runs I am just using as little as needed to make it run
 
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PostPosted: Fri May 07, 2021 4:25 pm    Post subject: Re: This VAC is driving me nuts. Reply to specific post Reply with quote

I've been using my 1 quart starter tank since this is a VAC I got a few years back and it had sat and when the rear tire almost got me I had not done anything with it up till now. Good spark tried 2 carbs, and good compression as in around 120 in each cylinder
 
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DKase
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PostPosted: Fri May 07, 2021 7:31 pm    Post subject: Re: This VAC is driving me nuts. Reply to specific post Reply with quote

Belt it up to another tractor. Works very well when alone.
 
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old
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PostPosted: Fri May 07, 2021 7:40 pm    Post subject: Re: This VAC is driving me nuts. Reply to specific post Reply with quote

It doesn't have a belt pulley plus I don't have a belt that would be likely to hold up. Funny thing is I had it running the other day but could not let it run long since it didn't have any coolant in it. It now has a full radiator all be it only water but full and I cannot get it to start and run again
 
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John Saeli
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PostPosted: Sat May 08, 2021 8:41 am    Post subject: Re: This VAC is driving me nuts. Reply to specific post Reply with quote

It really sounds like timing. However, have you established you have good fuel flow to the carb? Or, is it running the few seconds and flooding?
 
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PostPosted: Sat May 08, 2021 9:49 am    Post subject: Re: This VAC is driving me nuts. Reply to specific post Reply with quote

It fired and dies pretty quick. Kicks the starter out at times. Carb that is on it right now is off another VAC I have and it runs well with either carb. But I do get black smoke when it is trying to run so maybe a bit rich. This thing has sat for years. I did have it running the other day but could not let it run long since the cooling system didn't have anything in it due to a bad lower hose. Got the hose fixed but now it will not start again
 
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John Saeli
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PostPosted: Sat May 08, 2021 10:17 am    Post subject: Re: This VAC is driving me nuts. Reply to specific post Reply with quote

Are you getting good gas flow to the carb?
 
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PostPosted: Sat May 08, 2021 10:21 am    Post subject: Re: This VAC is driving me nuts. Reply to specific post Reply with quote

Yes has good gas flow to the carb and the open end of the carb at times shows to much gas. No air cleaner at this time. What gets me is I had it running the other day then fixed the hoses and now will not start again. Have a new cap and rotor I will be putting on when I get back to it
 
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