No spark on cub where to start

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Whitecub50
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No spark on cub where to start

Postby Whitecub50 » Sun Oct 18, 2020 9:25 pm

I have a 1976 international cub Loboy 185. I just replaced the coil, points, distributor cap, condenser, rotor, set points to .020 as it calls for and I have no spark? When I put my voltmeter on the coil I have no voltage. I tried with the key on the key off and still no voltage the tractor ran just fine before this I’m not sure what it could be I checked my battery cables the positive cable coming to the starter generator it has 12 V but for some reason I have no spark. Could something be grounded out causing there to be no voltage to the coil?

BigBill
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Re: No spark on cub where to start

Postby BigBill » Sun Oct 18, 2020 9:57 pm

Fuse on the dash board? Not sure but it’s left out.
I'm technically misunderstood at times i guess its been this way my whole life so why should it change now.

Eugene
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Re: No spark on cub where to start

Postby Eugene » Sun Oct 18, 2020 10:00 pm

There is a solenoid, oil pressure start switch, ignition switch, and possibly a clutch safety switch in the start circuit.
Whitecub50 wrote: I checked my battery cables the positive cable coming to the starter generator it has 12 V but for some reason I have no spark. Could something be grounded out causing there to be no voltage to the coil?
Perhaps something open.

Or the oil pressure start switch not opening up when oil pressure is up. The oil pressure switch grounds out the ignition circuit until oil pressure is up enough to open the switch.

Does the engine crank over?
I have an excuse. CRS.

outdoors4evr
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Re: No spark on cub where to start

Postby outdoors4evr » Mon Oct 19, 2020 6:08 am

I would start following the wires back to their source. Look for bare wires, cracked insulation, or broken connections.
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade

Whitecub50
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Joined: Wed Mar 04, 2020 4:12 am
Zip Code: 46360

Re: No spark on cub where to start

Postby Whitecub50 » Mon Oct 19, 2020 8:56 am

The engine cranks over like crazy, just dosent have spark

Whitecub50
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Zip Code: 46360

Re: No spark on cub where to start

Postby Whitecub50 » Mon Oct 19, 2020 8:58 am

The tractor ran great the engine has been overhauled everything is brand new the points just needed to be changed so I did an ignition tuneup points condenser rotor new And now no spark won’t start but like I said the engine cranks over

Eugene
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Re: No spark on cub where to start

Postby Eugene » Mon Oct 19, 2020 12:11 pm

Disconnect the electrical wire from the oil pressure switch. Cover the end of the disconnected wire - so that it is doesn't ground or short out. Located on the side of the oil filter housing.

See if the tractor starts.

No start. Check you igniton points installation. Points could be shorted out where the condenser and points spring attach to the insulation block on the side of the distributor.
I have an excuse. CRS.

Whitecub50
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Joined: Wed Mar 04, 2020 4:12 am
Zip Code: 46360

Re: No spark on cub where to start

Postby Whitecub50 » Mon Oct 19, 2020 6:08 pm

Ok I’m gonna check the oil pressure switch wire, I have electronic ignition now from petronix so no points etc...

Whitecub50
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Re: No spark on cub where to start

Postby Whitecub50 » Mon Oct 19, 2020 6:18 pm

Ok so I pulled the oil pressure switch wire off put my voltmeter on it and I have 12 V on the wire hook the wire back up to the oil pressure switch put my voltmeter on it and I’ve only got a half a all does that mean oil pressure switch is bad ground it out or whatever???

Whitecub50
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Zip Code: 46360

Re: No spark on cub where to start

Postby Whitecub50 » Mon Oct 19, 2020 6:18 pm

Half a volt is all I have at oil pressure switch

Whitecub50
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Re: No spark on cub where to start

Postby Whitecub50 » Mon Oct 19, 2020 6:27 pm

So when I unhook the oil pressure switch wire and turn the key on I have 12 V at my coil now as to where before I didn’t what the tractor still won’t start with the oil pressure switch disconnected even though I have voltage at the coil and distributor what could it possibly be now???

Eugene
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Re: No spark on cub where to start

Postby Eugene » Mon Oct 19, 2020 6:54 pm

We are gaining on it.

Leave the oil pressure switch disconnected.

Remove the coil wire from the distributor. Place the bare end of the wire about 1/8" from engine block. Crank the engine over, checking for spark.

Spark, check the ignition timing.

No spark, something, problem, in the interior of distributor.

Wait on the oil pressure switch until you solve the start problem.

Did you remove the distributor to replace the ignition points?
I have an excuse. CRS.

outdoors4evr
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Re: No spark on cub where to start

Postby outdoors4evr » Tue Oct 20, 2020 5:30 am

Like a cub, Prime the oil pump before starting!
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade

Eugene
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Re: No spark on cub where to start

Postby Eugene » Tue Oct 20, 2020 7:37 pm

Whitecub50 wrote:Ok I’m gonna check the oil pressure switch wire, I have electronic ignition now from petronix so no points etc...
Remove the Petronix and reinstall the points ignition.

Did you install the Petronix with a no start situation?
I have an excuse. CRS.

Whitecub50
Posts: 46
Joined: Wed Mar 04, 2020 4:12 am
Zip Code: 46360

Re: No spark on cub where to start

Postby Whitecub50 » Thu Oct 22, 2020 11:25 pm

Wow! Figured it out, the distributor was 180 out after installing electronic ignition. They said you would have to adjust timing but not 180 degrees. Runs like a champ! Idols smooth and has a load of power. Thanks for all the insight, much appreciated


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