1942 9n crank no start

Ben Da Hater

New User
I have a 1942 9n that died on me doing yard work. It has a month old brand new carburetor and all new plugs, cap, rotor, and condenser. All 4 plugs have good spark. The engine is getting a steady amount of fuel and air. I got it to start for a quick second and it was spewing oil out of the exhaust. After that it wouldnt even consider trying to start, just cranking and nothing. I tried spraying starting fluid in the carb and even took the carb off to see if I sprayed directly into the intake if anything would happen. Nothing. Just cranked and did absolute nothing else. I dont have access to a compression tester at the moment but thinking this is a internal engine issue.
 
I dont have access to a compression tester at the moment

Save yourself some time & money. Get one. Most parts stores 'rent' them.

If indeed that is oil coming out of the exhaust pipe, you do have an internal engine problem.
75 Tips
 
Ben,For now just take all plugs out and put your finger over the hole ,turn it over and see if you can feel compression.IS ANY PLUGS SOAKED WITH OIL But from your explanation it sounds like it could be a broken fiber cam shaft gear.
Does it crank over faster than normal?

This post was edited by Den N Ms on 08/15/2021 at 01:13 pm.
 
(quoted from post at 13:08:42 08/15/21) Ben,For now just take all plugs out and put your finger over the hole ,turn it over and see if you can feel compression.IS ANY PLUGS SOAKED WITH OIL But from your explanation it sounds like it could be a broken fiber cam shaft gear.
Does it crank over faster than normal?

This post was edited by Den N Ms on 08/15/2021 at 01:13 pm.

I took all spark plugs out, none soaked with oil, looked like maybe a little in the treads of it. None on the end of the plugs. I did feel compression on all 4. While cranking with the plugs out it cranked much faster than normal.
 
Ben ,Ok good,now do you have spark on all 4 that will jump a 1/4" gap? You need an adjustable spark tester,or open a old plug up to 1/4"gap,or take a Phillips screw driver stuck in the plug wire connection and held 1/4" away from a head bolt.
 
(quoted from post at 21:18:54 08/15/21) Ben ,Ok good,now do you have spark on all 4 that will jump a 1/4" gap? You need an adjustable spark tester,or open a old plug up to 1/4"gap,or take a Phillips screw driver stuck in the plug wire connection and held 1/4" away from a head bolt.

Yes all 4 will spark a 1/4 gap, not as strong of a spark as like 1/8 but all 4 spark with a 1/4 gap.
 
Ben ,Drain out all the fuel,sediment bowl and carburetor bowl also and replace it with some new clean gas.I think that you could have had water in the gas. Buy a new set of NGK plugs... NGK 3112 gap.025 and install them.

This post was edited by Den N Ms on 08/16/2021 at 08:45 pm.
 

Havent put new plugs in it yet, but I was able to do a compression test. Going in order from cylinder one the numbers went like this: 75 psi, 60 psi, 85 psi, 60 psi. I would assume that it should still fire with these numbers.
 
Ben, you said, It has a month old brand new carburetor and all new plugs, cap, rotor, and condenser. Assuming you also put in new points and forgot to mention them, how was it running before you replaced all those parts. A little history might help.
 
(quoted from post at 09:43:37 08/18/21) Ben, you said, It has a month old brand new carburetor and all new plugs, cap, rotor, and condenser. Assuming you also put in new points and forgot to mention them, how was it running before you replaced all those parts. A little history might help.

Correct new points as well. Before I did most of the work it ran really bad, wouldnt even make it into 3rd low and could do any gears in high. The exhaust was popping a lot and also the oil pressure would drop as the oil got warmer. It had very bad misfires and carb was way out of adjustment. After I did all the repairs it ran way better, would go into any gear you wanted to high or low and overall just sounded much healthier. And before it died it was running really great. Maybe an hour or so before it died it did seem to be picking up just a little bit more white smoke from the exhaust, more than normal. Not a lot but just enough to notice a difference.
 
Okay, Den N said to try draining the gas and putting in fresh. I think he was thinking the oil you saw coming out of the exhaust could have been sooty water, that and the white smoke you saw could have also been water. So I would give that a try at least to eliminate it.
Also you might want to read the post down a few from yours, titled, 48 8N severe engine miss by LloydY. You might find that interesting.

This post was edited by Jim L WA on 08/18/2021 at 04:47 pm.
 
Ben,Yeh,drain all the gas out,sediment bowl and carburetor bottom bowl.That use to be one of the cheapest repairs was fresh clean gas,but not any more with the price of good clean gasoline. :lol: LoL I believe that is your problem with the white smoke and water it's not oil dripping out the exhaust pipe,missing engine ,popping and dyeing.Water in gas is a lot more problem with ethanol in the gas now days,condensation and separation.So the water goes to the bottom of the tank,fills the sediment bowl ,and carburetor bowl.Water also causes spark plugs to short out and continue to stay that way sometimes even after they are dried out .That is why you have to replace them.
 
Spark plugs did it, started right up after I installed the new plugs. Thank you for the help with trying to figure out this issue. Im glad I got this resolved.
 

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