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Classic Truck Discussion Forum

1936 international 6 cylinder flat head with 6 volt wiring w

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Siegmund

08-15-2020 13:19:34




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A 1936 international stake bed truck with flat head block and 6 volt electrical won't fire.Has gas, quick start does not help was running ok in years past. Could this be the coil? Does anyone know what coil to use or are they all similar for a 6 volt system?Thanks,Brad




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steve s. in pa

08-16-2020 18:13:08




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 Re: 1936 international 6 cylinder flat head with 6 volt wiri in reply to Siegmund, 08-15-2020 13:19:34  
Yes, it could be the coil, but it could also be a few other things. I would start at the contact points. with the cap and rotor removed, points closed and ignition switch on, take a screwdriver and open the points. You should have a nice little spark when they open. if it is near a ground, your coil wire should have a bigger snap at the same time. If you have no spark at the points, but you are sure there is power to the coil, just take some fine sandpaper (like 400)and clean the points, then try again. Let us know what you find. Steve

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Siegmund

08-17-2020 10:46:18




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 Re: 1936 international 6 cylinder flat head with 6 volt wiri in reply to steve s. in pa, 08-16-2020 18:13:08  
Good spark at points and even better from coil.could it be the condenser?spark plugs don't seem fouled.



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steve s. in pa

08-17-2020 17:42:35




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 Re: 1936 international 6 cylinder flat head with 6 volt wiri in reply to Siegmund, 08-17-2020 10:46:18  
So far so good. I think your condenser is ok. Next step is to check for spark at your plugs, and I will guess that you will also have spark there. If you do, I'd put a spoonful of gas into a couple of cylinders, install the plugs and try again and see if it fires at all. Of course while you had the plugs out would be a good time to make sure you have compression. Just speculating here, but I suspect that there may not be anything wrong with your truck, but rather your problem is that your 6 volt starting system is just not turning your "dry" engine fast enough to get going. If everything else checks out, (spark, compression, fuel), I'd have someone give it a tow and catch it in gear. You might even have to tow it in gear for a ways before it comes to life. That would get the engine spinning a lot faster. In my experience, it takes a lot more to get a long sitting engine to start the first time than it does after it has been run even a little bit. How long has it been since the truck ran? was it sitting inside or outside?

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Siegmund

08-19-2020 05:17:24




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 Re: 1936 international 6 cylinder flat head with 6 volt wiri in reply to steve s. in pa, 08-17-2020 17:42:35  
0ver 1i2 yr this has sat in a non-heated but dry barn. it was running ok before it sat although it was not idling well when I parked it.My problem now is that the ignition wires are mixed upland I don't know which goes where. I have a new set that I want to prepare and install anyhow but I can't figure where to run them. It is a flathead straight 6 engine.the rotor seems to turn counter-clockwise in the distributor.I think the cylinders are 1-2-3-4-5-6 beginning at the firewall with #1? the distributor only seats in on position (has an index tab/slot).but I can't fid any number on the distr. that would ID the positions!?Any thoughts would be appreciated greatly.

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steve s. in pa

08-19-2020 13:36:44




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 Re: 1936 international 6 cylinder flat head with 6 volt wiri in reply to Siegmund, 08-19-2020 05:17:24  
You are correct. your cylinders are 1 to 6, front to back. Your firing order is probably cast into the cylinder head somewhere, but it is 153624. To find number one on your distributor cap, take the spark plug out of number 1 cylinder, place your thumb over the open plug hole, and have a helper turn the engine over( by hand is best, or jack the truck up and turn a back wheel in gear, but you can hit the starter if you have to) until you feel the compression against your thumb. Now look at the position of your distributor rotor. It should be pointing at or close to where your number 1 plug wire should be. Since you already know the direction of the distributor rotation, just install the wires starting at number one, and follow the firing order in the direction of rotation. Steve

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