8n runs 45 min quits

trying2mow · May 10, 2016

My 8N runs 30-45 min then acts like it has run out of gas. The cap is ventedm,plenty of gas, good battery. Next morning it starts and does same thing. Gas runs freely out of carb plug with no apparent fuel blocks??? HELP!!!!!!!!!

DetailDave · May 10, 2016

I had a welder with continental f162? Engine. When warm would not start at all. Cool cranked(by hand) easily, coil
broke down when hot. Good luck.

Dean · May 10, 2016

If you have the common type of aftermarket replacement ignition switch, change it.

Alternatively, short it out with a jumper wire.

Difficult to diagnose and explain but common issue.

Dean

Andy Martin · May 10, 2016

Of course you need to see whether you have spark after it dies. If you don't have spark, check the condenser or coil. either one can fail after they get hot and take some time to cool down. Usually will run five to fifteen minutes before failing but 45 minutes is not out of reason. Until you check spark you don't know if it's spark or fuel.

old · May 10, 2016

Helps us help you if you tell us if it is a front mount distributor or side mount and if 6 or 12 volts. If front mount good chance the coil is going bad since they heat up and in 30-45-60 minutes if the time frame that they start to loose spark. The mount it does that check your spark and make sure you have a good blue/white that jumps a 1/4 inch gap at all 4 plugs

Dell (WA) · May 10, 2016

try........8N's came with 2-different kinda ignition systems. 4-nipple front mount and 5-nipple side mount. The 4-nipple front mount coil is temperature sensitive. And will run fer 30-45 mins just as you complain and QUITS 'cuz it overheats. Once it cools off, guess what? It'll run again until it overheats. Since I'm an electronic engr, I know how to cool things of with a finned heat sink. Got one off'n old TV set about 4-inches square and plastic tie-wrapped it to the HOT ignition coil. Worked like a charm. Me? I'd make a wind blocker outta cardboard to keep the HOT radiator wind off'n yer melty coil, might work. (at least its cheep) It is good you checked fer ventilated gas cap 'cuz mud-daubers like to clog the domed vent at the front of the gastank where you kent gitt to itt and gravity doesn't like a vacuum.........HTH, the amazed Dell

rrlund · May 11, 2016

Take the inline gas filter off,throw it as far as you can hurl it and splice the gas line back together.

DMP62 · May 11, 2016

Had one do the same thing, it was the coil. This was on a stock 6 volt set up.

If the tractor has been converted to 12 volt make sure it's not running 12 volts to a 6 volt coil, should have a resistor in place.

Ken(Ark) · May 11, 2016

(quoted from post at 09:02:34 05/11/16) Take the inline gas filter off,throw it as far as you can hurl it and splice the gas line back together.

If you have a clogged filter then you have avoided a clogged carburetor . Filters are great if you are smart enough to use them to your advantage . Eliminating filtering is a poor choice .

I have installed an inline glass filter from Mr gasket just above the carb . I used the one that has threaded ends so I did not need any rubber fuel line . I can visually see if the fuel is flowing .

I also converted to a round metal coil and the system is virtually problem free .

trying2mow · May 11, 2016

Thank you sooo much

trying2mow · May 11, 2016

Thank you a lot!!

trying2mow · May 11, 2016

Thank you very much

trying2mow · May 11, 2016

Thank you!!!!!

trying2mow · May 11, 2016

thanx!!!!

trying2mow · May 11, 2016

Thanx I will do that....I always thought the on-off switch either worked or it did not. I am just using a single pole single throw Radio Shack switch??

rrlund · May 11, 2016

They should just have a sediment bowl. If the old one leaks,then it needs a new one. It's vapor locking when it gets hot with that inline filter on it.

tracto-man · May 11, 2016

Lemme guess, you have a part rubber fuel line? What happens when that gets hot or ends up touching the exhaust manifold and catches on fire? The N's already have 3
filters. One in the tank, sediment bowl screen, and carburetor elbow where the fuel line enters. If ya don't have those parts, they work better then an inline fuel
filter.

Dean · May 11, 2016

If you are not using the common aftermarket key switch sold for vintage Ford tractors, look elsewhere for your problem.

Dean

old · May 11, 2016

While some in line filters work okay many do not due to the fact they are made for a system wit ha fuel pump. I have had many calls where a guy has a tractor tht will not run long if at all and had an in line filter on them. I removed them made sure the sediment bowl had the screen in it like ti should and that tractor has then run just fine ever since

8n runs 45 min quits

trying2mow

Member

DetailDave

New User

Dean

Well-known Member

Andy Martin

Well-known Member

old

Well-known Member

Dell (WA)

Well-known Member

rrlund

Well-known Member

DMP62

Member

Ken(Ark)

Well-known Member

trying2mow

Member

trying2mow

Member

trying2mow

Member

trying2mow

Member

trying2mow

Member

trying2mow

Member

rrlund

Well-known Member

tracto-man

Member

Dean

Well-known Member

old

Well-known Member

Similar threads