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1976 25 hp Johnson want start

C

capehorn1

New member
How do you test the coils to s

How do you test the coils to see if they are good? Where is the location of the points? and what should the compression of the engine be? the motor is an electric start.
 
"You can do little more than c

"You can do little more than check the primary and secondary windings for continuity. Maybe someone can tell the resistance to expect but even that wont tell you about sorted turns.

Points, condenser and the magneto coil are under the flywheel. To remove it you will need a harmonic balancer puller.

Diag of ignition system HERE

But what are your sparks like. "
 
"(Regular Magneto Coils -

"(Regular Magneto Coils - Continuity Test)
(J. Reeves)

Checking the continuity of the ignition coils....... Have the ohm meter set to High Ohms.

Remove the primary wire from points. Remove the coil ground wire. You do not want either of these wires touching anything.
Connect the black lead of a ohm meter to the spark plug boot terminal, then with the red ohm meter lead, touch the ground wire of the coil.

Then touch (still with the red lead) the primary wire. You should get a reading on both touches (contacts). If not, check the spring terminal inside the rubber boots of the spark plug wire.

If there is no continuity between the secondary circuit (spark plug) wire and the primary or ground, remove the coil from the armature plate, then check the continuity directly between the prong within the coil (prong that the plug wire connects to) and the primary and ground. Poor or no continuity of a coil (or plug wire) is one reason for weak spark, s/plug fouling, or no spark.

We're curious Jack.... Did you cure the problem?

Thousands of parts in my remaining stock. Not able to list them all. Let me know what you need and I'll look it up for you. Visit my eBay store at:

http://stores.ebay.com/Evinrude-Johnson-Outboard-Parts-etc?refid=store"
 
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