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Hard Starting Super C

A

Anonymous-0

Well-known Member
I have been having trouble getting my SC to start consistently. Once started it runs perfectly normal. I have had this tractor about 15 years and use it year around. It has always been a easy starter. It is converted to 12 volts. About a year ago it would not want to start so I put a tune up kit in it, points, plugs and condenser. It didn't help. Summer came and it was back to easy starting. This winter back to hard starting. It will crank over and hit on one cylinder which is enough to disengage the starter and then die. Today I cranked it over for a few seconds with the ignition switch off, chock on, throttle wide open. I was thinking this would help prime the cylinders with gas. I then turned on the ignition moved the throttle back to 1/3 open and it started right up. Again once started this tractor runs great. Give it 30 seconds to warm up in cold weather and runs like a champ. Any ideas what to look at? I am thinking carburetor but what could be wrong that effects starting but not running? Thanks for the help.
 
check coil wire.

i had c with graphite wires and coil wire burned away from the end. got to where it would not start.
 
Even with 12v it might be time to check the cables and grounds for loose/corroded. To see if it is ignition related, use a different 12 v battery negative to ground, and positive to ignition input (coil if 12v no ballast required, or ballast if so equipped. Don't turn on the key as the ign jumper battery is connected. Spin the starter and if it roars to life, maybe a lesser ohm ballast resistor is needed, or a ignition bypass added. It is easy to do. Jim
 
You need to check your battery voltage during cranking to see how low your battery voltage is. You will need a helper. If your battery cables
are cracked, I would replace them. Clean all connections until they're shiny and includes where your battery is grounded. Hal
 
Could be spark or fuel problems but only you can find out.
Check your spark first. Make sure it is a good blue/white and will jump at least 1/4 inch gap at ALL 4 plug wires.
Next pull the carb drain plug and make sure you have a good steady flow of gas out of the carb for a few minutes. Catch the gas to look at it for water/dirt etc.
Plus in the winter and the cold it needs a bit more gas to start so if it has an adjustable main jet you might try opening it up a bit
 
I'd do a full tuneup including adjusting valves. I had an A that always started hard since I got it. It had the wrong plugs in it.

It sounds like it is not wanting to draw in fuel. Clean the carb out good.
 
I agree with gmitch . make sure all of the intake bolts are tight and the bolts that hold the carb to the intake.If it starts good in warm weather the steel will tend to swell and all the gaskets are tight. In the cold the steel will tend to shrink and the gaskets can leak causing the engine to suck air instead of fuel.This may not be the problem but it is a good thing to check. Hope this helps.
 
You ever remove the hose to air cleaner and see if the choke closes or if the plate fell out? If you crank that engine over a couple times with the choke on and it don't start gas should be running out the bottom of the carb.
 
Hold your hand over the throat of the carburetor while a helper makes an attempt to start the engine. See if there's good suction on your hand.
When cars had mechanical fuel pumps that's how we determine if the fuel pump was shot. Poor suction means low intake manifold vacuum. Hal
 
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