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Doug E.
Doug E., Kawasaki Master Technician
Category: Small Engine
Satisfied Customers: 2877
Experience:  Professional mechanic since the late 70's on Kawasaki, Arctic Cat, Jonsered, John Deere and others.
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My John Deere Model 110 Type T0641 S/N 135377 Has no spark

Resolved Question:

My John Deere Model 110 Type T0641 S/N 135377 Has no spark at the spark plug. It is about a 1968 year model? Is this an Ignition Coil model or is it a magneto generated spark. It is a Kohler 8 hp. and it has points on the front of the engine. They are clean and seen to be working correctly. Everything else seems to be working as it should- it cranks over nicely and all the safetys seem to be operating properly but NO SPARK? I have not changed the condenser or the points or the spark plug. This was my dad's tractor and he passed away and left it to me. It has not run in about 4 years. Fuel system and Carb have been cleaned and are looking OK. I wish to get it back in running condition in dad's memory for my children to drive and enjoy.
P.S. You look awfully young to know about a old engine like this one. Just a little humor, I know you will do you best to give me some guidance as to where to look to solve this problem. I do not see an Ignition Coil- the high tension wire runs behind the flywheel (and the wires to the points).
Good luck! and Thanks in advance!
Submitted: 3 years ago.
Category: Small Engine
Expert:  Doug E. replied 3 years ago.

Doug :

Hello

Doug :

I've got the same model, but mine is a 1972

Customer :

Hi Doug,

Doug :

It is a simple battery point ignition and should only take a few minutes to diagnose. You will need a multimeter.

Customer :

I wondered if anyone would remember this old tractor!

Customer :

Have a multi meter.

Doug :

I will be blowing snow with mine in the morning.

Doug :

Check for voltage at the coil. You should have 12 volts on the power side.

Customer :

I'm in Georgia BUT we have had SNOW. A record 6 inches. The High tension lead goes behind the flywheel. I do not see an ignition coil.

Doug :

Hang on. There were two ignition systems used.

Customer :

That is why I questioned that some of these early tractors and a magneto.

Customer :

That's Had a magneto.

Doug :

The magneto version of that engine doesn't have points or a condenser.

Doug :

The online John Deere parts catalog appears to be wrong on your model. Give me a few more minutes. I have the factory Kohler manuals and I have the original JD books around here somewhere.

Customer :

Wow! I am a manual; and book fanatic but I don't have anything on this tractor. Just started working on it so I WILL get proper manuals and books soon!

Doug :

OK, the online JD parts site is wrong. There was one version of the K161 engine that had a point magneto with an external point. Your tests are simple but you will need to pull the magneto cover. (You may need to remove the engine mount bolts to raise the engine so it clears the frame.) Unplug the wire to the harness. This removes all switches from the system. Crank the motor. If you have spark, the problem is in a switch or the wiring.

Doug :

If no spark, remove the point wire. Attach an ohm meter, buzz box, test light, etc., to verify the point makes full contact when closed and shows fully open on the meter when open.

Doug :

If the point checks out, replace the condenser. If still no spark, replace the magneto coil. One note here. I did have a few where the triggering magnet on the flywheel fell off. If so, just epoxy it back on and you are in business.

Customer :

A magneto works with the turning of the engine! To pull the magneto cover it looks like I need to pull the flywheel and the magneto is behind it.

Doug :

That's correct.

Customer :

Looks Good! Thanks for the help. I am Bill Craig atXXX@XXXXXX.XXX If you need any Jaguar or any old English car questions answered contact me! Thanks again.

Doug :

Thanks for the accept. You can still get the engine manual from the Kohler website. Download the K series manual. You will have to watch ebay for the tractor manual.

Doug E., Kawasaki Master Technician
Category: Small Engine
Satisfied Customers: 2877
Experience: Professional mechanic since the late 70's on Kawasaki, Arctic Cat, Jonsered, John Deere and others.
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