Id like to know if you can test your magneto without a multi circuit tester ? if i am getting spark, is my magneto still good? how do i read the numbers to know what year i in fact have ?

If you're using a neon lamp type spark tester directly to chassis or engine block then, yes they can light with current that is insufficient to effect sufficient spark. Try connecting in series with the plug or use a gap type tester or the actual plug.

The Kawasaki v-twin uses two separate ignition modules (magnetos with electronics) and although not impossible it is unlikely both would fail at the same time or one would fail and stop the other from working.

It is more likely a safety circuit is causing the no run state. For this model, locate the RUN relay and check that the WHT/BLK wire (magneto kill) is open circuit to ground (engine block). If there's continuity to ground then magnetos are killed. Ignition switch OFF or PTO switch ON and seat not occupied are other kill states.

See parts diagrams for schematic.

https://www.gravely.com/en-us/partsdiagrams?search=991128

How old is it???? Does it have a read out that tells you what's wrong?????When is the last time you did a maintaince tune up on it???? Mine is fueled by propane and I changed the oil and plugs and it's been fine since....Sometimes it's the starter/ignition..I would do a complete tuneup first, then clear codes, then try starting it up manually....If that works put it back on auto..Good Luck

to be honest, it would probably be less expensive and far less time consuming to replace the entire trimmer with a new/used timmer. If you are willing to invest the time, replace the magneto, the spark line and be certain the spark plug is clean and properly gapped.

No Spark can be one of 3 faults.
The wire to the spark plug is either shorted somewhere along its length. An open circuit along the wire coming out of the magneto or
the magneto is not generating a spark.
Best way to test for a spark is to use a neon test lamp.
Hold one end and bring the other end close to high voltage wire under test. Test on your running car first.
Trace the HV wire back to the magneto on side of engine. rotate engine by hand to get magneto to generate a current. Remove spark plug to allow engine to rotate easier without compression.
The high voltage is generated from a coil inside magneto assembly.
Good Luck
Trevor

Three things, the magneto is faulty, the circuit is grounded, the plug wire or boot is faulty. A quick test is to remove the small ground wire from the magneto (usually black), if you then get spark the circuit is grounded by a safety switch or a bad wire segment. If not remove the spark plug rubber boot and remake the connection, if you get spark you've fixed it and if not you need a new magneto.

a mower with a bad coil has no spark and will not run. you know something is wrong if the mower will not run. if you take out the spark plug , from the engine and connect the spark plug wire to the spark plug and lay the spark plug on the engine block so that the spark plug makes a good ground connection from the spark plug body to the engine metal and then have a friend pull the recoil starter rope, you will see a spark jump from the inside terminal of the spark plug to the arm of the spark plug that is part of the spark plug body.
if you see no spark, then there may be something wrong with the coil or with the primary ignition circuit.

You must have a friend pull the recoil starter because it is nearly always impossible to see the spark when you are trying to pull the recoil starter yourself. you cannot see the spark because you are moving to much to focus your eyes. the spark is hard enough to see from 12 inches away.
You can test the spark coil by removing it from the mower but only if it is an automotive type spark coil. I have a feeling that it is not an automotive type spark coil. you can test the primary winding of the spark coil for continuity with a $10.00
multi meter from walmart,home depot or lowes or harbor freight
You must fully read and fully understand the instructions.of the multi meter in order to use the multi meter without burning out the multi meter. you can test the primary windings of the coil with the coil electrically disconnected from the lawn mower. you must make writen notes so that you can reconnect the coil exactly as you removed it.
the primary windings of the coil should read between 10 to 1000 ohms. if there is no ohms reading the coil is open,no connection and you need to buy a new coil. if the primary winding has a resistance (ohms reading) the coil has conitinuity but still must be tested for shorts to ground. on the highest resistance scale that your meter has , put one test probe on one terminal of the primary winding and the other test probe on the ground of the coil or the case of the coil. a good coil has no ohms reading fromthe coil primary winding to ground.

you should buy a lawnmower repair manual for your make and model of lawnmower because there is a lot to this and i cant type that much. too much for me to tell & too much i dont remember. Its been 15 years since i worked on an ignition system of a lawnmower. try asking your question on youtube.com and on google.com or ask.com, bing.com and study up on it.

you can use a neon bulb voltage tester to check for spark
a magneto gets its spark from the collapse of the magnetic field that occurs when the points close
the magneto is comprised of two coils.
a primary and a secondary.
when the points are open the primary and secondary are one continuous circuit and generates a considerable magnetic field when the magnet passes the magneto.
when the points close the primary coil is shorted to ground.
this causes a very rapid collapse of the magnetic field in the magneto.
this field collapse can generate a very high voltage surge (the power for the spark)
this surge can exceed 12,000 volts or more and yes it is a bit painful

try another ecu

Your mower is not charging the battery. Something is wrong with the charging system. It more than likely uses a magneto type charging system. It is mounted under the flywheel. Unless you are adept at repairing these take it to a pro.