8N WONT START

[TERRY47]

MY 1947 8N HAS ALWAYS STARTED UP NEARLY ON CONTACT WITH THE STARTER SWITCH. YESTERDAY I STRTED IT DROVE ABOUT 100 FEET, TURNED IT OFF TO GREASE MY MOWER AND NOW THE TRACTOR WILL NOT START. THERE IS SPARK AT THE PLUGS, BUT THE ENGINE DOES NOT FIRE IT JUST TURNS OVER EASILY. THE PLUGS WERE DRY SO I PULLED THE CARB, THERE WAS GAS IN IT AND IT IS PRETTY CLEAN INSIDE, I STUCK MY FINGER UP INSIDE THE INTAKE MANIFOLD AND IT WAS DAMP FROM GAS. THERE DOES NOT SEEM TO BE FUEL GETTING ALL THE WAY TO THE PLUGS. DOES ANYONE HAVE ANY SUGGESTIONS?
THANKS, TERRY47

 

[mostly_gas]

Did you check for water in the gas? Try a SMALL amount of gas (drops) into a couple of the cylinders and you should at least some firing. If not check compression.

 

[TERRY47]

Did you check for water in the gas? Try a SMALL amount of gas (drops) into a couple of the cylinders and you should at least some firing. If not check compression.

THANKS, I WILL TRY BOTH AND WILL ADVISE. TERRY47

 

[LD1]

Is it 6v or 12v converted?

You said it didnt start but just turns over easy. That would worry me if 6v. I wouldnt descrive a 6v system with a good engine in proper order as "turning over easy". 12v would be a different story.

Also, was the spark a good hot blue spark? thats a must.

Try the gas trick. Or even a spray bottle with gas sprayed into the intake. If spark is good, you should get something.

 

[8N Ren]

First thing, can you please take your caps lock off lol.
I'm going to suggest easily overlooked things which I have done myself a time or two.

Enough gas in the tank? You could have a gallon of gas in there but if the bulb isn't turned on enough you won't get flow to the carb. s Make sure the sediment bulb in turned on (2 full turns).

All of your fuel screens clean?
Carb float stuck? Wrap the side of the bowl with a hammer handle or whatever you have nearby. Go easy that puppy is cast!
Water in the tank?
How long were you cranking it? Plugs are probably wet now and covered in spark robbing deposits. Pull em out and clean em, wave a propane torch over em to burn off the crap, but not longer then 2-3 seconds, then re-gap and install.
Make sure your points have their proper gap/camlube.

Good luck and post back with your findings.

 

[Soundguy]

I'm with mostlygas and ld1

Try some starter fluid or mist of fuel sprayed into carb while cranking over.

IF there is good spark, and all else is good. that should start it even with no gas in the tank.

Now.. something LD touched on.

turning over REAL easy?

If she don't start on the above test. pull the plugs and do a quicky compression test using your thumb on the plug hole. STUCK VALVES are not uncommon and do happen time to time.

post back... oh.. and DO double check that spark. it's the easiest thing to fix without your hands smelling like gasoline!

 

[TERRY47]

IT IS 12V AND HAS ALWAYS TURNED OVER PRETTY FAST. I TRIED SQUIRTING A LITTLE BIT OF GAS INTO THE CYLINERS. I AM GOING TO CHECK COMPRESSION AND GO FROM THERE. THANKS TO ALL YOU GUYS FOR YOUR RESPONSES AND SUGGESTIONS.

 

[Goaliedavid]

Terry it is not compression, "it started right up you drove it 100 feet and shut it off now it won't start, have spark but plug are dry" You are not getting fuel. Start by opening fuel shut off with fuel line removed are you getting good flow from tank to carb? if so float is likely stuck.

 

[Soundguy]

Terry it is not compression, "it started right up you drove it 100 feet and shut it off now it won't start, have spark but plug are dry" You are not getting fuel. Start by opening fuel shut off with fuel line removed are you getting good flow from tank to carb? if so float is likely stuck.

So.... can't possibly be compression.. right?

you must have never seen stuck valves ever ever before.

if it has spark, turns over and won't pop off on gas squirted in a cyl.. there is something other than a fuel stoppage.

 

[Goaliedavid]

So.... can't possibly be compression.. right?

you must have never seen stuck valves ever ever before.

if it has spark, turns over and won't pop off on gas squirted in a cyl.. there is something other than a fuel stoppage.

Your right it started fine you drove it 100 feet and shut it off and like magic all the valves stuck. Why ask for help if you know it already? hope it works out OK for you sorry to waste your time with my advice