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  1. G

    125hp ELPTO 2+2 miss/hesitation at high speeds

    It has been a while since I posted, but thought I would follow up. The new carb kits did not solve the problem. The fuel leak was fixed, but still having hesitation/miss at higher speeds and can only get about 4000 RPM at WOT. I saw another post about the check valves on 3 & 4 cylinders...
  2. G

    125hp ELPTO 2+2 miss/hesitation at high speeds

    Finally had an opportunity to work on the boat. Replaced the stator and trigger. Unfortunately, same issue persists. I'm running out of parts to swap. So... After all this. Compression is good. Electrical *should* be good (mostly all new parts), and I'm back to suspecting fuel delivery...
  3. G

    125hp ELPTO 2+2 miss/hesitation at high speeds

    Thanks! Certainly seems like a worthwhile purchase. I've ordered a new stator today and hopefully it will arrive prior to the weekend. Since I'd already have the flywheel off, I also purchased the trigger. Hopefully between the two I can either solve the problem or eliminate a couple other...
  4. G

    125hp ELPTO 2+2 miss/hesitation at high speeds

    I tested all the CDMs and they seemed OK based on my novice testing. I didn’t have the Mercury test tool, so just used alligator clips to the pins in the CDM. I don’t think that would affect it, but this is my first time through this process.
  5. G

    125hp ELPTO 2+2 miss/hesitation at high speeds

    Doing some additional troubleshooting this morning. Eliminated rev limiter as a source of the problem. Tested the ignition stator. The resistance on the green/white to white/green is out of spec. Spec shows 660-710 and mine measured 751. Before I spend more money throwing parts at this...
  6. G

    125hp ELPTO 2+2 miss/hesitation at high speeds

    Thanks! I replaced 2 CDMs. I'll try to get the factory service module and do some of the additional troubleshooting. (I've been using the Clymer manual so far).
  7. G

    125hp ELPTO 2+2 miss/hesitation at high speeds

    Thanks for this additional information. Indexing flywheel and checking timing on each cylinder might be a bit above my skill level. Are you aware of any instructions that would help a layman mechanic do this?
  8. G

    125hp ELPTO 2+2 miss/hesitation at high speeds

    I'll plan to take the carbs off next week and make sure the floats are set correctly. I didn't check that when I had them off before. Hopefully will also try to determine if there is an adjustment to allow the butterflies to fully open. They they are all sync'd with the butterflies closed...
  9. G

    125hp ELPTO 2+2 miss/hesitation at high speeds

    The main fuel filter was replaced, but I don't know whether it was opened to check inside. When I inspected the carbs, they looked very clean. I'll pull them again and check.
  10. G

    125hp ELPTO 2+2 miss/hesitation at high speeds

    I have a 2000 Mercury 125hp (ELPTO 2+2) that is driving me crazy. Last fall it started to hesitate when accelerating and was generally running rough so I took it in for service this spring. Carbs were cleaned, new carb kits installed, spark plugs replaced, fuel filter replaced. Compression...
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