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Hard starting 12v 240

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240 blues

01-17-2000 08:13:40




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I recently converted my 240 utility to 12 volt using a 12v generator, new regulator, 12v coil, 12v battery, and installed a resistor(chrysler type) between the coil and the distributor. The conversion worked excellent while in my shop (50-60 degrees) but now that it sits outside (0 degrrees this morning) It doesn't want to start very good. The battery turns the starter very well, but the tractor seems to fire only if the throttle is set at an idle. At this setting it will fire a couple of times but will not catch and stay running. I can't make it fire at any other throttle setting. This is upsetting becaucse it is my snowplowing tractor, and my driveway is much too long to shovel! Can the coil be bad? It is a coil that I took off a 656(which was working fine) to install one with a built in resistor to attempt to make my planter monitor work better (it didn't make the monitor work any better). It had a complete tune-up not long ago. Can the starter be turning so fast the tractor has a hard time starting? Please help, the snow is getting deep!

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bill

01-18-2000 05:32:05




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 Re: hard starting 12v 240 in reply to 240 blues, 01-17-2000 08:13:40  

i think you have water in the air cleaner that gets very hard when outside. like ice!



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TWOPOP

01-17-2000 08:28:02




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 Re: hard starting 12v 240 in reply to 240 blues, 01-17-2000 08:13:40  
IS THE COIL YOU ARE USING ONE WITH A BUILT IN RESISTER ? if so remove the chrysler type and do not use. also you said you installed the resister between the coil and distributer. the resister goes between the ingition and the + side of the coil



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240 blues

01-17-2000 08:39:30




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 Re: Re: hard starting 12v 240 in reply to TWOPOP, 01-17-2000 08:28:02  
I don't know if the coil is the resistor kind or not. Is there any way to check it? The resistor is wired to the + side (wouldn't run at all if it wasn't?) the system is set up as negative ground now. Thanks for the info.



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ltf in nc

01-17-2000 11:49:29




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 Re: Re: Re: hard starting 12v 240 in reply to 240 blues, 01-17-2000 08:39:30  
As TWOPOP stated you have things wired incorrect. With a system with a negative ground, you need to go from the ignition switch through a resistor to the + terminal on a 12 volt coil w/o internal resistor. (You are not using the original 6 volt coil are you?) From the - terminal on the coil go to the distributor. With this arrangement you can try the bypass referred to in the post by JK MN. If JK MNs suggestion helps, repost and I will tell you how to accomplish this by modifying the ignition switch.

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JK MN

01-17-2000 09:13:11




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 Re: Re: Re: hard starting 12v 240 in reply to 240 blues, 01-17-2000 08:39:30  
240 blues, Try using a jumper wire around the resister while trying to start. If it starts, remove the jumper wire, and the engine should still run. If it dies, use the jumper just long enough to warm the engine until it will run without the jumper. Using a jumper wire will put a full 12v to the coil for a stronger spark. I had a 404, that sometimes would not start when outside damp and cold, and the jumper did the trick. You may also want to check the condition of the points and cap and rotor. Some of the later 12v tractors had an ignition bypass wire that attached from the solenoid directly to the coil, and energized only when the starter was engaged, thus putting extra voltage to the coil during the starter use. good luck jk

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