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  1. W

    1990 Mercury Outboard 135HP Black Max Intermittent No Spark #1 plug

    I hate intermittent problems. 3 times this week, I went out to start the boat and had no spark in the number 1 plug. I go back an hour or so later and it has spark. Its not the plug wire (I switched with another and the problem stayed on #1) and I put a new coil on it to eliminate that...
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    How to use a DVA meter?

    I have just purchased a DVA meter because I can not figure out what is wrong with my engine. Mercury Blackmax 1990 135hp V6 Carbed. I would like to check out the trigger and the spark at each coil. Can anyone tell me the details on how to use this meter to test this out? The engine will run...
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    Switch Box Question

    Is it possible for a swithbox to fail only on the low RPM side? The reason I ask is I am loosing all power from idle to about 2k rpm and then it runs fine. I've had this happen before and it was the stator. This time the stator is fine. I plan on running a few more test the next time I get to...
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