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WH1618speed

‘74 C-160 not turning engine over fast enough.

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WH1618speed

Hey everyone. I picked up a non running C-160 8-speed. A few wires at the ignition switch were frayed and a new connector made it turn over. It will not turn over fast enough though. It acts like the battery is half dead even when jumped. I have also transplanted another C160 ignition system that I know works on this. Still the same issue. The negative cable was frayed… replaced it. Nothing different. I transplanted all the ignition wires as well. The engine spins freely when the spark plug is removed so it is not seized. It has good compression. I am stumped. Please help!

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squonk

Either too much voltage drop to the starter or bad starter itself. Make sure the mounting of the starter to block is clean from rust

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ineedanother
11 minutes ago, WH1618speed said:

Hey everyone. I picked up a non running C-160 8-speed. A few wires at the ignition switch were frayed and a new connector made it turn over. It will not turn over fast enough though. It acts like the battery is half dead even when jumped. I have also transplanted another C160 ignition system that I know works on this. Still the same issue. The negative cable was frayed… replaced it. Nothing different. I transplanted all the ignition wires as well. The engine spins freely when the spark plug is removed so it is not seized. It has good compression. I am stumped. Please help!

Do you have a spare starter to swap and try?

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8ntruck

What about the cable on the positive side of the battery?  Clean connections to the battery and starter solenoid?  Clean connections on the heavy cable between the solenoid and starter?  Both of those cables in good condition?

 

Good luck.

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rmaynard

Sounds like a weak starter. But before you get a new one, make sure your battery to frame and engine to frame grounds are good. The starter gets it's ground from contact with the engine, and engine gets it's ground through the frame.

Edited by rmaynard
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WH1618speed
3 hours ago, rmaynard said:

Sounds like a weak starter. But before you get a new one, make sure your battery to frame and engine to frame grounds are good. The starter gets it's ground from contact with the engine, and engine gets it's ground through the frame.

Ok... this starter was from another C-161 that is only a few years old. I will have to check the ground to the engine. I know that it works as it should. Thanks.

Edited by WH1618speed

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WH1618speed
4 hours ago, 8ntruck said:

What about the cable on the positive side of the battery?  Clean connections to the battery and starter solenoid?  Clean connections on the heavy cable between the solenoid and starter?  Both of those cables in good condition?

 

Good luck.

All cables are clean and in good condition with no frays. It is baffling to me.

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WH1618speed
6 hours ago, ineedanother said:

Do you have a spare starter to swap and try?

Yep tried it.

 

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8ntruck

Some more thoughts:

 

Have you checked the voltage at the starter when you are trying to crank it?

Have you tired to jump the starter directly to the battery?

Tired to crank it with the spark plug out?

Tired a different battery?  Sometimes a bad battery in a jump will pull he jump battery down.

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953 nut

Why won’t my starter turn over from the key switch?

Lets take a logical step by step inspection of your starter problem.

Is your PTO in the ON position, a wheel horse will not start with the PTO on.

Have you had the battery load tested at an auto parts store?

Have you cleaned and tightened all electrical connections including grounds?

Are all fuses good and fuse holders cleaned?

If these have all been done, we can check components of the starting system as follows; don’t skip a step or you may miss the problem.

Be sure the transmission is in neutral and the parking brake is set.

Take a pair of automotive jumper cables and connect the black cable to your battery  "-" and a good clean spot on the engine. Now connect the other cable to the large post on the starter and touch the other end to the battery "+" terminal, does the starter turn over? If the starter turns over the battery and starter are good. If it didn't turn over try the same steps with the battery in your car/truck, if that cures the problem then the "good" battery wasn't so good.

Presuming the starter turned over move the jumper wire from the starter post to the other end of the wire going to the starter which is one of the large posts on the solenoid. If the starter turns over when the battery is touched by the jumper as before then that cable is good, if not you have found your problem.

Presuming the starter turned over move that jumper to the other terminal of the solenoid, connect the other end to the battery and use a small piece of wire to temporarily connect the battery "+" terminal to the small terminal on the solenoid, this should cause the solenoid to close and the starter to turn over. If not, the solenoid is probably the problem.

If this was successful remove the large jumper cable and use the small jumper wire to the small terminal of the solenoid, the solenoid should close and the starter turn over. If not the cable to the battery is the problem.

Presuming all of these have been successful remove the black jumper wire and repeat the small jumper to small terminal, if the starter turns over the ground is good.

If all of these components test good then remove your ignition switch, be sure the transmission is in neutral, parking brake on, clutch depressed and PTO off. Use a small jumper to connect the terminals that were connected to the “B” and “S” terminals of the ignition switch. If the starter turns over then the PTO switch and other safety switches are operating properly and your ignition switch may be bad

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tunahead72
23 hours ago, WH1618speed said:

... It acts like the battery is half dead even when jumped...

 

16 hours ago, 8ntruck said:

... Tired a different battery?  Sometimes a bad battery in a jump will pull he jump battery down.

 

Just a thought, let's not overlook the obvious...

 

Have you checked both batteries with a meter?

 

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