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9n Won't start

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Petersen

01-06-2008 12:35:25




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I have a 9n that I bought a few months ago. Engine was stuck, no rust in cylinders just rings stuck. Unstuck engine cleaned carb ran good and started within two cranks everytime. Now the problem:

I go to start it yesterday starts for a second or two and dies. Will no start again. checked spark, good clean blue spark. Cleaned carb nothing noticible found. With the air cleaner hose off there is good suction into the carb. Gas is leaking out of the air cleaner hose connection but the plugs are dry. Starting fluid would not help. Any help would be appreciated. I did have it started for a minute and died wouldn't start again. Again plugs dry, strong spark.

could there be something with the manifold that is causing air to be forced backwards? Valves? Not sure it just stopped working

Thanks for you help

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Den N Ms

01-06-2008 15:40:34




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 Re: 9n Won't start in reply to Petersen, 01-06-2008 12:35:25  
Petersen,You said,I have a 9n that I bought a few months ago. Engine was stuck, no rust in cylinders just rings stuck. I think your rings may still be stuck in the ring groves of the piston causing low compression.Remove your spark plugs and add two teaspoons of ATF in each cylinder,replace your plugs and try starting it again.If it starts you need to get a can of PB Blaster ,remove the plugs and divide the can between all 4 cylinders.Replace the plugs Finger tight and let it set 2 or more days.Remove plugs and spin the engine over clearing the cylinders out replace the plugs then start it up

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david heath

01-06-2008 14:12:31




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 Re: 9n Won't start in reply to Petersen, 01-06-2008 12:35:25  
same thing happened to me after putting new carb on gas running out of choke on floor, replaced plugs with next heat range up,points condencer, wires, all napa parts. starts every time now no matter how cold out.



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Dell (WA)

01-06-2008 13:46:34




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 Re: 9n Won't start in reply to Petersen, 01-06-2008 12:35:25  
Pete..... ..you write..... ."could there be something with the manifold that is causing air to be forced backwards?..... ..giggle, giggle, snort, ahrummp, koff, koff..... .sorry.....Unless your starter motor suddenly gott an internal re-wire job, yer engine will ALWAYS TURN CLOCKWIZE.

It ain'chur carb and it ain'chur valves, its yer sparkies. PROVE yer sparkies will jump a 3/16" gap with bluesnott authority. Take enny ol'sparkie and bend the side electrode out for a full 3/16" for a precision sparkie tester. Clamp the metal shell to enny convenient bracket and plug enny sparkie wire to top of tester. With ignition ON, crank yer starter motor and watch yer sparkie gap. My eazy starting 6-volt 8N will jump a full 3/8" gap.

Iff'n I hadda guess, I'd guess yer frontmount points have SLIPPED (gap = 0.015") or the points have INVISIBLE contaminates and need to be polished with strip of brown paper grocery bag ...or... dollar bill pulled between the closed points. New points, $5 (cheap). SHORT 3/16-32 points screw with invisible wear. $0.50 (cheap)

Now REPLACE yer FLOODED sparkies with NEW DRY sparkies. AutoLite 437's are recommended. (gap = 0.025") Why? Ennytime yer engine don't start and you start crankin, even thought you think yer sparkies are dry, you done FLOODED them with INVISIBLE no-lead contaminates. And the ONLY WAY to gitt'chure lazy sparkies to jump the gap is by replacing them with CLEAN DRY sparkies.

NO, you don't throw yer dirty flooded sparkies out. After your engine is running good, you replace flooded sparkies one-atta-time in HOT ENGINE to clean and dry and SAVE for the NEXT time yer engine don't start..... ....Dell, yer self-appointed sparkie-meister

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Petersen

01-06-2008 14:25:31




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 Re: 9n Won't start in reply to Dell (WA), 01-06-2008 13:46:34  
Dell -

Thanks for the help. I have new spark plugs Autolite 437's I'll replace them tomorrow. What I was referring to with the manifold is could there be a hole(rusted) from the exhaust to the intake? I don't feel and exhaust pressure at the carb but was just thinking of all the possibilities

Thanks



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Gaspump

01-06-2008 15:32:29




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 Re: 9n Won't start in reply to Petersen, 01-06-2008 14:25:31  
Yes there could be a hole between the exhaust and intake portions of the manifold, not a rarity at all. However if it ran well recently the manifold is most likely OK. If you have an original manifold with a test port and can remove the plug a vacuum guage test will quickly show a bad manifold and/or sticking valves. The Sparkie Meister seems a little over testy this evening, has some vague input, don't worry he'll get over it. Yes, gas fouled plugs can be cleaned and they will work well, new ones are the easiest method of cleaning.

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Bruce (VA)

01-06-2008 12:55:34




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 Re: 9n Won't start in reply to Petersen, 01-06-2008 12:35:25  
The valves didn't stick over night. As a good rule of thumb, a 1 - 2 minute run times is usually the condenser, ballast resistor, or vacuum lock....or, failure to turn the gas on. A 5 minute run time is usually fuel screens. A 15 minute run time is usually the ignition switch. A one hour run time & then restarts after it cools down is usually the coil. So, check for fuel. Remove the bolt in the bottom of the carb; as long as the fuel is turned on, you should see gas flowing out of the carb.

And, lastly, if gas is dripping out of the carb throat, you are probably using way too much choke.

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W Almond

01-06-2008 13:47:33




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 Re: 9n Won't start in reply to Bruce (VA), 01-06-2008 12:55:34  
I am having the exact same problem, will run for a second at most then quit and won't start again. Also same is god sparl, cood vacume at carb, good compression, with choke on fule will collect at intake throat but plugs are dry. I have new plugs, new wires, new distriutor, new rotor, new points, new petcock/floatbowl, new coil. I have gone through it all and can't seem to figure it out. I have also doubble checked to make sure that I have spark after a time to rule out an intermitent ploblem, and starting fluid did not work for me either. I am no slouch at trouble shooting engines I have been wrenching on different things for years so I know what I;m doing this problem is not a duh fix it's somthing else.

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Den N Ms

01-06-2008 14:42:35




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 Re: 9n Won't start in reply to W Almond, 01-06-2008 13:47:33  
W Almond,Check your firing order again ,after changing your wires you may not have it right.Firing order is 1243 CCW at the distributor.Guess what,Spark at the correct time,fuel,compression=RUN!



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Petersen

01-06-2008 13:38:50




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 Re: 9n Won't start in reply to Bruce (VA), 01-06-2008 12:55:34  
If the condenser or ballast resistor was the problem would I still have spark? When I did get it to run for a little a few minutes it didn't want to idle. Telling me mabye there was not enough vacuum to pull the fuel up to the cylinders. Although when I am cranking and holding my hand over the carb it sucks pretty hard. Ignition switch and coil are new. Fuel runs out of the bottom drain at a constant flow don't think there is a problem between the tank and the carb. Even when there is gas dripping out of the carb the plugs are still dry. Kinda lost here.

Thanks

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Joe)NYC)

01-06-2008 19:59:00




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 Re: 9n Won't start in reply to Petersen, 01-06-2008 13:38:50  
Petersen,
You did not mention anything about the carburator innards. Have you done anything to the inside of the carb? You may have blocked jets and all the vacuum in the world at the carb mouth may not get any gas into the chamber. First you might want to check your carb adjustments. They may be all out of whack. Check the archives for carb adjust procedures.



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