No Spark

[scottsevinrude]

I have a 1980 outboard motor, the top cylinder is not sparking (new plug staying bright and shiny) I can get the motor started but real rough running of course. With this in mind when the motor does start the key will not kill the motor (I have to choke it out)

Evinrude
model E35ELCSM

I also checked the wires at the key

5-wires

Yellow with red stripe is starter wire, terminal S.
Purple with white stripe is primer/choke wire, terminal C.
Red or red with purple is hot from battery, terminal B.
Black with yellow stripe comes from power pack, terminal M on left side of B
terminal looking at back of switch.
Black is ground, terminal M on right side of B looking at back of switch. (raised terminal)
One terminal is open with "I" beside it (is this ignition??? and do I need a wire to it)

 

[scottsevinrude]

Re: No Spark

please help

 

[F_R]

Re: No Spark

"I" is for any low power accessories you want to be powered only when the key is on. Like a tachometer, for instance. The rest sounds good.

 

[hortguy]

Re: No Spark

Make sure the black/yellow wire is unbroken from the power pack to the ignition switch. If it is, it will keep the switch from turning the motor off.

 

[scottsevinrude]

Re: No Spark

can some help me with what to check for no spark on the top cylinder

 

[Walker]

Re: No Spark

Are you sure its not sparking? Sounds to me like a lack of fuel to the top cylinder. Even if its not sparking the sparkplug should be wet if its getting fuel.

 

[The Grail]

Re: No Spark

Scott, I'm new here, but maybe I can help. To check for spark, a simple way is to remove all plugs, plug the one in question into the plug wire, ground the tip to the engine with insulated pliers, and crank it. If it's getting spark, you'll see it. For more detail, and for more in-depth methods, check out the FAQ section of the forums, or use the search functions. I've learned a lot from reading other people's postings. Good luck.