77 75 hp No spark Cyl 3 Change out coil?

[densvxer]

ThanK You in advance for this great forum & all the outboard savy contributors

I was about to run through the Reeves Link & Sync procedure & set the spark tester for 7/16" (motor has been bogging under load)

Decided to check spark on each cyl, and guess I am not getting any spark on number 3.

So is there other checks I need to make before replacing the coil?

This motor is a 1977 75hp Model 75743s


Todd Aka DenSVXer
Littleton, CO

 

[fixmyevinrude]

Re: 77 75 hp No spark Cyl 3 Change out coil?

You might want to try switching that coil with one of the other ones on the motor and see if the no spark problem follows the coil. I would mark the coils as it is easy to get them mixed up as you troubleshoot the problem.

 

[Joe Reeves]

Re: 77 75 hp No spark Cyl 3 Change out coil?

Switch, temporarily, the orange leads that go from the powerpack to the coil so that whatever orange lead was firing #1 or #2 coil now fires #3 coil.

If #3 coil now fires (has spark), then obviously the coil is okay. Be sure to switch those orange wires back where they belong.

 

[densvxer]

Re: 77 75 hp No spark Cyl 3 Change out coil?

Thank You Joe, you saved me a needless part purchase

I switched the orange leads #2 coil to position #3 and vice versa on the power pack and now the #3 coil fires and #2 coil does not.

I guess this means I need a new power pack?

More costly than a new coil (figures my luck)

 

[Joe Reeves]

Re: 77 75 hp No spark Cyl 3 Change out coil?

That normally does indicate a failed powerpack.

 

[densvxer]

Re: 77 75 hp No spark Cyl 3 Change out coil?

Thanks Again Joe

Powerpack Installed
Timing light is picking up signal on all 3 cylinders

Now to get it sync'd up

densvxer