40 hp force weak spark

[Texn4Life]

I bought a 40 hp force by merc last year cleaned carb and started right up!
I have used it several times since then. a couple of weeks ago i went to start it and it took a couple of tries to get it started but it did. Mind you it would always start on the first crank. I went to start it last weekend and it took about 6 cranks to finally start. I brought it home, put a spark tester in it and the light wast very dim. I also took the sparkplug out and grounded it and seamed to be weak. I also cleaned the carb and replaced the fuel line just cause. If i put a volt meter on the SP wire and cranked it what should the voltage be?
Should I try testing anything else? I don't want to mess anything up, i like this motor.

 

[jerryjerry05]

Re: 40 hp force weak spark

This site might have it.It is a spark checker.It measures the strength of the spark.Auto Zone has them about $5.99 You install it in line and adjust the needle to what ever size the spark is supposed to jump.
I think 7/16in. is the gap for most Force motors.
If there is trouble starting then:spark test then a compression test.
Are the plugs burning right?One cleaner than the other?Check the fuel pump diaphram.Ethanol fuel is screwing up LOTS of motors.Check the hoses for weak and damaged lines.It can melt the inner liner on some hoses and clog the pump and carb.J

 

[Texn4Life]

Re: 40 hp force weak spark

Ok,
I tried the spark tester and got nothing. Now I'm not getting any spark at all.
I checked the kill switch and as far as I know it's not the kill switch. How do you test the kill switch?
I tested the Ignition coils and they tested fine but I am confused as to test the stator, trigger and the rectifier. do you know how to test them, which wires to test and what are their resistance. I have read the manual and I feel really dumb when reading it.
I really appreciate your help.
Thanks