89 johnson 225 no spark

[3218dan]

i have a 225 johnson i get fire on 4 cyl out of the 6 and the fire will move some times on other cyl? . i have changed out the stator,powerpack,and trigger,whats up!!whaty eles can i change?????!!!!!!!!!

 

[OBJ]

Re: 89 johnson 225 no spark

Hi Dan and welcome!

What kind of device are you using to check the spark with? A spark tester? Are the ignition coils on clean block grounds?

 

[3218dan]

Re: 89 johnson 225 no spark

checking with spark gap tester.and sometimes i just lay the plug to a ground..i'll check the coil grounds,the manual has not got me very far.thanks dan

 

[Dhadley]

Re: 89 johnson 225 no spark

What happens when you start it? Does it run OK then?

 

[JUSTINTIME]

Re: 89 johnson 225 no spark

check coil primary voltage
-primary resistance
seconardy resistange
-coil grounds

 

[Joe Reeves]

Re: 89 johnson 225 no spark

Disconnect the large RED electrical plug at the engine. Remove all spark plugs. Rig a spark tester whereas you can set a 7/16" gap.

Crank engine by using a small jumper wire from the battery terminal of the starter solenoid to the small 3/8" nut on the solenoid that engages it (not the 3/8" hex ground nut). If you now have proper spark, in all probability the ignition switch has a slight intermitent short, in which case, replace it.

Let us know what you find.

 

[3218dan]

Re: 89 johnson 225 no spark

What happens when you start it? Does it run OK then?

it was running ok with a small miss/pop.then one day it wouldn't start,so i started checking for spark and fuel and found this problem.i have not tried to start it sence.but i think it has had this problem sence i bought it.

 

[3218dan]

Re: 89 johnson 225 no spark

Disconnect the large RED electrical plug at the engine. Remove all spark plugs. Rig a spark tester whereas you can set a 7/16" gap.

Crank engine by using a small jumper wire from the battery terminal of the starter solenoid to the small 3/8" nut on the solenoid that engages it (not the 3/8" hex ground nut). If you now have proper spark, in all probability the ignition switch has a slight intermitent short, in which case, replace it.

Let us know what you find.

 

[3218dan]

Re: 89 johnson 225 no spark

oh yea forgot to tell everyone i disconnected the harness and the kill switch (black and yellow wire) to the power pack.and i still get the same..

thanks joe any more ideas?

 

[3218dan]

Re: 89 johnson 225 no spark

check coil primary voltage
-primary resistance
seconardy resistange
-coil grounds

ok i'll give it a try thanks

 

[3218dan]

Re: 89 johnson 225 no spark

What happens when you start it? Does it run OK then?

should i run it?

 

[wilde1j]

Re: 89 johnson 225 no spark

2x

 

[wilde1j]

Re: 89 johnson 225 no spark

Start it.

What manual are u using? The OEM shop manuals have decent checklist for non-running motor condition.

What was the result of the needle gap spark test?

 

[3218dan]

Re: 89 johnson 225 no spark

Start it.

What manual are u using? The OEM shop manuals have decent checklist for non-running motor condition.

What was the result of the needle gap spark test?

i do not have oem manual,i have a clymer.sorry not sure what needle gap test is

 

[wilde1j]

Re: 89 johnson 225 no spark

See Joe Reeves comment ... easy to make a tester with some sharpened nails, etc. Try a search for 'spark tester'.

 

[3218dan]

Re: 89 johnson 225 no spark

See Joe Reeves comment ... easy to make a tester with some sharpened nails, etc. Try a search for 'spark tester'.

i set it up on a air gap tester,un pluged the harness and the kill switch wires,i get spark on all of them for about 15 20 turns and then they start to drop and come back every so often.and every time i start to turn it over after that they fire once or twice then no more.

 

[Joe Reeves]

Re: 89 johnson 225 no spark

That engine must crank over with at least 300 rpms in order to have the stator energize the powerpack.

Is the engine dropping down in rpms drastically after those first 15 or 20 turns?

Since you now (temporarily) have proper spark on all cylinders when using a spark tester, Disconnect the RED connector as mentioned previously when testing for spark to see if the spark continues strong as it should. If the spark now continues strong, suspect the ignition switch.

 

[3218dan]

Re: 89 johnson 225 no spark

That engine must crank over with at least 300 rpms in order to have the stator energize the powerpack.

Is the engine dropping down in rpms drastically after those first 15 or 20 turns?

Since you now (temporarily) have proper spark on all cylinders when using a spark tester, Disconnect the RED connector as mentioned previously when testing for spark to see if the spark continues strong as it should. If the spark now continues strong, suspect the ignition switch.

the last test was done with the red harness conector unpluged,i quess it's possible my battery is a little weak and not getting up to 300 rpm.i'll check the battery or replace..

 

[3218dan]

Re: 89 johnson 225 no spark

That engine must crank over with at least 300 rpms in order to have the stator energize the powerpack.

Is the engine dropping down in rpms drastically after those first 15 or 20 turns?

Since you now (temporarily) have proper spark on all cylinders when using a spark tester, Disconnect the RED connector as mentioned previously when testing for spark to see if the spark continues strong as it should. If the spark now continues strong, suspect the ignition switch.

well mr reeves i think you may have got it.i don't think it's the battery but the starter.i just switched out the battery with a fresh one and my starter just quit..so i guess i'll buy a new starter and start over..thanks for all the help.i will let everyone know how it goes after my new starter gets here.thanks dan