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  1. gmacrae

    Merc Laser 220 - weird voltage on TPS wire

    Hi guys. I'm still having problems with my Laser 220 and getting it running right. It all seems to keep coming back to the TPS. Long story short, i have a new TPS so that cant be the problem. Here's what i've found lately: The TPS has 3 wires right; TAN/BLK (gnd from ecu) ORANGE (about 8v from...
  2. gmacrae

    89 Merc Laser 220 XRi - fouling or over-oiling

    Hi Guys. I posted a thread here a while back to help pinpoint this engines issues. The result of that batch of work was replacing the trigger coils, which at least has it firing all cylinders reliably now. But it turns out that was only half the problem. It still will foul the plugs badly and...
  3. gmacrae

    89 Merc Laser 200 - advice to stop plugs fouling?

    Hi guys. This is my first post here but im going to be sticking around, have a fair bit to learn about the boat I've bought recently :) Anyway, its a mid 80's ski boat with a recently rebuilt Mercury Laser 200 (injected). Its been built up to ski race, and as well as the rebuild, the motor's...
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