Ignition module - common faulty part?

[twr7cx]

Motor is a 1993 Mercury 2-stroke 60HP 3 cylinder outboard.

Is this the ignition module for it?:






Is it common for these to become faulty? I've got an issue that after the motor's been running for a while (5 to 10 minutes) it has a huge loss in power. I've checked the fuel - all the lines are clean, pulled the carbys apart and they were clean. Changed plugs and leads. I've put a timing light on the leads and it would seem that the coils are still firing, so I'm sort of lost now as to what it could be, wondering if a faulty ignition module could be the cause, was speaking to a bloke the other day who reckons that these are a common fault. Is there any way to test it?

 

[twr7cx]

Re: Ignition module - common faulty part?

I've done some googling and it would seem it's correct name is the power pack or switch box of the thunderbolt cdi. also read it's a common component to fail and seems it causes the issue I have. Is there any way to test them to confirm (since it's a 3 cylinders not a 6 I can't swap them over, and I don't have another one handy to try)?

 

[Laddies]

Re: Ignition module - common faulty part?

Yes, the OEM switch boxes are troublesome and there is not really a box test you may test the input and output with a DVA but most indualiguals don't have one so they test the other components and if they are OK the box must be bad. Here's the test for both ways from CDI.