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Humm, ok. I presume that's a thunderbolt ignition on that one.
I do recall that Merc used to use a tigger that was located in the distributer. How many coils are located in there? Some had one coil per cylinder, others used one coil that went to a distributer. If you look at the distributer assembly, there should be 2 or 3 wires coming from it that goes to the power pack. That in effect is the trigger. What you need to do is make sure that you are first getting power to the power pack. From there you can have the ignition key on, (leave the existing spark plug wires the way they are) and put the positive side of the volt meter to the low voltage side of the coil (this would be the wire coming from the power pack) With this connected you can manually move the flywheel. You should see the needle on the volt meter bounce quickly then stop. If you use the starter it might go by too quickly to realize. (its basically sending a 12volt signal to the coil. The coil should energize and create the spark. (when you are doing this, the key needs to be on the ON position to throw power to the power pack!) If you are getting power to the coil and that's it (no spark), you most likely have a bad coil. If there is no power going at all to the coil from the power pack, you need to check to make sure that the trigger is working. Pretty easy thing to check, its only a switch that turns on and off depending on its location at the moment. I believe that there 3 wires going to it. One is power and the other two are the switching mechanism. You should see something happen when you turn the flywheel. If its not doing anything then you can have an issue with the distributer. The trigger on that is built into the unit, so a new or used replacement would be necessary. If you really want to get move involved, try a local boating store and get the shop manual. They have generic information like I provided above but may be a little more in depth. You local library may have something too, and that's not going to cost you anything. If you are looking for parts or another motor, you might want to check out ebay. A quick search on there turned up a few motors of that vintage in different parts of the country. If your lucky it might be close to you. Might be worth it considering the distributer on these things are expensive and somewhat hard to find. Tom |
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