How do I test the coil on my Honda G300 5hp rotavator. Because there isn't a spark on the plug

all 6 dead?
on all jeeps
we connect the scan tool
and crank and in many cases, over 1/2 it tells me why.
like CMP bad, CKP or spark ignitors dead.
TJ jeep it is
see the free FSM yet, posted over 300 times here.
chapter 8d pg 22
http://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#service


my guess is the coil rail , preplexs you, as it does everyone
testing spark here is no fun.
3 coils on one pack (rail) (wasted spark system)
do you know how to test wasted spark?
must be done in pairs, or 2 plugs fail.
8w-30 page see the coil there,
see there are only 3 coils
that is defacto wasted spark systems.

so to test that, you must do all 6 at once, or 2 in pairs
there is no other ways.
are spark plugs fresh/????
did you scan it first..... ????????
if not that is hopeless

page 12 covers that in chapter 8d

questions????
1: check fuses first.?
2: does CEL lamp glow key on.
3: does ASD relay energize keyon and cranked
and hold there cranked, if not the SCAN tool tells you why not.
in every case.
4: got spark with only these wired.
1 and 6
2 and 5
3 and 4

in each case the 2 are connected, and shells grounded to engine.
and will fire in pairs, this is how it works.

best (avoiding a SHOCK)
is to insert 6 new plugs there gapped to spec.
then ground all 6 shells to the engine, metal
then crank.... is use bare copper wire to wrap all 6 daisy chained
then to a clip to metal of engine.
person 2 cranks, and you see all 6 fire, in sequence.
that is the correct way.
if the ASD is dead, then the will be no SPARK ever. or fuel.

see asd here, what it is, and how to test it.
http://jeepdied.com/


http://jeepdied.com/no-start.html


do not hold parts in hand cranking
or you light up like a June bug.

There could be many things wrong but you will need to find out what trouble codes are set on it as any starting point.

Testing of the fuel and ignition systems is in order. Intermittent problems need testing when the problem is present, otherwise it won't help find the problem.
I would start by checking for spark on a spark plug wire (or two or three plug wires, in case it may be a bad coil), during those times when it won't start. You need to see a blue, snapping spark to verify ignition system is working.
To check the fuel system, have the fuel pressure checked, and the injector circuit checked. Good that you hear the pump, but you don't know if fuel pressure is correct, or if fuel is getting into the cylinders. One short test is to spray starting fluid or carb cleaner into the intake while engine is cranking. If engine fires up for a few seconds, you know it is a gas related problem.
If ignition system is the intermittent problem, could be failing coil or coils, ignition module, crank position sensor, even the computer, or a wiring problem like a bad connection. Testing of each component will be required, or you could start throwing new parts at it, like many people do, until you find the bad part. Find a reputable mechanic-there still are a few, lol.

If each plug has multiple coils then remove a coil from another plug and test that one. If it sparks, then you know the issue isn't the wiring, but the original coil.

test battery -is it holding 12.6v charge-if not then its over 3 yrs old or the alternator is bad--also inspect inside distributer cap and plug wires--they get corroded and need replacin

You need a test light if you are not getting any spark your start is power at the primary part of the coil then you will need to check for pulse at the negative of the coil, you have a connection problem here is the most famous failure the coil connection has a tendency to spread and not make contact have someone crank the vehicle and you wiggle the coil connection see if that help other than that you need a test light your problem is in the wire

Yes it is very much possible.But there are many other possibilities too,including starter and spark plugs issue.

If your engine cranks normally but will not start because it has no spark, or it stalls and won't restart because it has no spark.

You can also do a test to confirm the problem .The procedure to do the test is as follows:---

If your engine has spark plug wires, disconnect one of the plug wires from a spark plug and place the end of the wire near a metal surface on the engine. Then insert a small Phillips screwdriver into the end of the wire (the plug boot), or a small bolt or nail to provide a conductive path. Then crank the engine and look for a spark to jump from the screwdriver, bolt or nail in the end of the plug wire to the engine. If you do not see a spark, there is an ignition problem.

OR-----------

If your engine has a coil-on-plug ignition system with no plug wires, In that case remove one of the coils from the spark plug and insert an old spark plug, a spark plug tester or a screwdriver into the end of the coil. Ground the spark plug or plug tester to the engine, then crank the engine and look for a spark. No spark indicates an ignition problem.If the engine has no spark, check for voltage at the coil positive terminal when the ignition key is on. If NO voltage, then problem is on the trigger side of the coil (pickup, crank sensor, ignition module or primary wiring circuit).

But If there is NO voltage at the coil itself, then in that case the problem is on the supply side (the ignition switch or ignition wiring circuit).-----------------

Jeep cranks but no start:----------------

A jeep that cranks over but doesn't start, in many cases will be due to a bad fuel pump, a broken timing belt, an inoperative cam sensor or crank sensor. Also these problems are related to faulty spark plug. Check the spark at spark plugs when you start the jeep. Do you notice any spark. Actually you should see. If in case there is no spark then it's a spark plug problem. Also the coil pack gives power to spark plug. So check the voltage at coil pack. It will show 12 volt. If there is no voltage noticed at coil pack then its faulty coil pack that has to be replaced. If all the possible options checked out ok then check the car starter. The starter gets power from battery to start the jeep. If the starter is faulty then it will not let the car to start. Also check and confirm that there is fuel in the jeep. If its very low fuel then in some cases this causes the problem. Also check and confirm that fuel pump is functioning properly and the fuel filter is not clogged. One of the easiest ways to check for a fuel pump related problem is to spray a little starting fluid into the air intake while trying to start the jeep. If the car starts momentarily, then there's a good chance the fuel pump is not working or the jeep is out of gas. You can also listen for the fuel pump's humming sound when the key is first turned on. Also if a inoperative fuel pump is suspected, a good technician will always check to verify there is power and ground being supplied to the pump, to eliminate the possibility of a bad relay or electrical issue. Fuel pressure can be checked with a pressure gauge and if there is pressure, pulse can be checked at the fuel injectors in several ways including the most common, with the use of noid lights. If the injectors don't have pulse the engine won't start. ---------- This troubleshooting tips will help you to solve the problem. Thanks. Helpmech.

Either the spark plug is faulty or the coil pack is faulty.The spark plugs get power to spark from coil packs.

If the engine has no spark, check for voltage at the coil positive terminal when the ignition key is on. If NO voltage, then problem is on the trigger side of the coil (pickup, crank sensor, ignition module or primary wiring circuit).

But If there is NO voltage at the coil itself, then in that case the problem is on the supply side (the ignition switch or ignition wiring circuit).

But if the coil has voltage, then problem may be a bad high voltage output wire from the coil to spark plugs or hairline cracks in the coil output tower.------Getting this all possibilities checked will point towards the exact faulty part which is to be replaced.----------This should help.Thanks.Helpmech.

You need to take each spark plug out and individually test them while u start them up. Take one plug and put it back in the the plug wire and while you are holding it to a ground crank it over. If you see a spark the plug is good. You probably do have foul plugs. If thats not the case then check the fuel system like fuel pump, fuel filter, and that kind of stuff.