40 hp Mercury 2 stroke no spark

[Paul Moore]

I have a 1990 Mercury 40 hp 2 stroke on my pontoon. It sat from July to Oct. and now no spark to the plugs. Using a test light I found spark on the top and bottom input wires of the wiring block or power pack as some say but no spark coming our to the plugs. To me this says a bad block but would like some confirmation before purchasing a new one. Anyone out there to help me?????? Thanks in advance for you help.

Paul

 

[Laddies]

Re: 40 hp Mercury 2 stroke no spark

Here's the test from CDI.

 

[Paul Moore]

Re: 40 hp Mercury 2 stroke no spark

Laddies, Thanks for the comeback. Step 1 and still no spark. Step 2 shows rectifier is still good because I still have no spark. Step 3 is affirmative and Step 4 is OK. Step5----I don't have a resistance meter to check the resistance readings.
If I remove the 332-5772 switch box and take it to a dealer, can he determine if it is bad?----or do I have to take the boat to them?
thanks. Paul

 

[Laddies]

Re: 40 hp Mercury 2 stroke no spark

The only way to test a switch box is on the motor and you use a DVA and check input and output voltages. If you don't have a OHM meter to use then the best bet is to take the unit to a dealer and have them test the system for you, the parts a to expencive, to just guess about.