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9n engine restarting when it's warmed up

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BB

07-30-2000 16:40:16




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my 9n was runnign good. started alaways with the turn of the key and a little choke. all of a sudden, it started doing this. i ran it for 15 minutes, and then i shut it down...and then it wouldn't start. i pulled the choke out as usual gave it some throttle, but it wouldnn't catch fire. it was turning over, but i smelled gas and it seemed flooded. i rolled it down hill trying to pop the clutch and tried to pop the clucth in 2nd but same thin..it sounded like it wanted to start but it was like bogged down. i let it sit for a a couple minutes, and then it started right up, but with a big cloud of smoke. i then ran it for 10 minutes in 3rd and it seemed like it was like sputtering or misfiring a little bit. i then put it in neutral and smoke was coming out of the exhuast pipe bluish and mostly black. it never did this before at all. I shut it down, and now it won't start. i may give it a few more minutes to sit, but i smell gas too. can you tell me what may be wrong? it has new spark plugs.

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Fred OH

07-31-2000 08:12:39




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 Re: 9n engine restarting when it's warmed up in reply to BB, 07-30-2000 16:40:16  
BB, After running these things for years and trying to keep on top of them, I think I can say this and get agreements from other knowledgeable users. As an engine and its associated parts get used and worn, they become less efficient. Starters become draggy and use more current when they are hot than when they are cold. More current is then used when starting and guess what it does to the voltage going to the coil to fire the engine? You're right, it pulls it down a little-maybe down to a critical point where it isn't enough to fire the engine. There are some secrets to learning an engines ways. The guys are right about choking a hot engine, (most of the time this is true) If it's a hard starter and it misses starting the first time, you might have to choke it a little to get it to take. Another thing when its hot and you have the starter whirling and it isn't starting, purposefully let off of the starter and a lot of times it will take right off. "Why"? You let off of the big current user and put more voltage to the coil. It kinda tells you the condition of your electrical system if this works. The six volt systems were kinda weak to begin with and the twelve volt systems took care of this. Learn your engine hot and cold, winter and summer by remembering each situation. I have found that on a decent running engine, just a little throttle seems to be the best when starting it. There are other ways of helping these situations, a little WD-40 or ether in the carb intake will get you going in the stubborn times. Also the "be careful" jump from twelve volts. You gotta get smarter than the metal. This board is a good place to do that. L8R----Fred

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BB

07-30-2000 17:10:12




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 Re: 9n engine restarting when it's warmed up in reply to BB, 07-30-2000 16:40:16  
maybe i should tell you that my friend who works in a mechiancs shop and cleanes engine heads told me to put a quart can of marvel mystery oil in with a full tank of gas to help my compression and he put a new haed gasket in about 3 weeks ago because of some green antifeeze in a cylinder. it was running great too he cleaned up the top of the head and cleaned the vavles but he said there was not a lot of carbon on them. i used 89 gas instead of the 87 i made the mistake of pumping the worng gas. and i put the quart of marvel in it before to make sure it was mixed. did he give me good advice and would that cause it to burn black smoke? it a big cloud of black and bluis wihite smoke that lingered when it finally restarted. am i in trouble with an expensive repair?

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norm-wy

07-30-2000 20:14:51




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 Re: Re: 9n engine restarting when it's warmed up in reply to BB, 07-30-2000 17:10:12  
BB
Your trouble may just have started with the choking when the engine was warm. My 8N doesn't like any choke after its been running enough to warm it up. Then with the real rich dose of Marvel's mystery oil you may have fouled the plugs. A quart of MMO in 10 gals is a 40:1 mix like you use in a chain saw etc. I have use MMO for lots of things but never that rich a mixture. Too much of a good thing??? Follow the advice in the previous posts and good luck.
FWIW

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BB

07-30-2000 16:56:02




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 Re: 9n engine restarting when it's warmed up in reply to BB, 07-30-2000 16:40:16  
it's been sitting for 30 minutes and it won't start at all now. it's cranking over just fine but it doesn't start up at all. this afternnon and for the past years it was just a slight turn of the key and it would fire right up each time. tank is half ull and its getting gas. should i pull a spark plug? but what should that tell me. i need my tractor tomorrow to brush hog the field and move some dirt with my scoop i am depeneding on it. this is a good forum and i need your help thank to you.

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Brian

07-30-2000 18:54:08




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 Re: Re: 9n engine restarting when it's warmed up in reply to BB, 07-30-2000 16:56:02  
A tractor that starts fine when it is cold but not hot is almost always the coil. Of course with yours not starting at all now it might not be it. If it was me I would put in a new coil and if it doesn't start just keep the old one as you will need it sooner or later. Also put new plugs in again. I have had plugs foul and then they don't work right again. Not trying to cost you money but if it isn't these parts they aren't real expensive and you will need them sooner or later.
Good Luck
PS: I keep an extra coil, plugs, distributor cap, points, and rotor on the shelf as it seems these always go on a Sunday morning with no place open to get new ones. Tractor luck i guess. :)

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tom 8N396936

07-30-2000 17:44:48




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 Re: Re: 9n engine restarting when it's warmed up in reply to BB, 07-30-2000 16:56:02  
BB,pull the plugs and see if they are fouled. If they are, clean them / replace them then drain the tank and refill with no mystery oil.
Hope this helps

tom



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