Recent content by jlh3rd

  1. J

    early spring maintenance

    well... 2 weeks ago took it out for a short run and it ran fine. Standing start idle to full throttle, no issue. Then a few days later went out across and north up the chesapeake bay, about an hour+ trip one way, then back , no issue. Then, last tuesday, ran down to see the blue angels at...
  2. J

    Mercury 150hp high speed misfire

    I'd start with filters first as stated. Mercs have the in-line main filter. There is a fuel rail filter also on some/ most bigger Mercs. , like my 2021 115 CT. But it is cumbersome to get to and not prone to clogging. Do you have a fuel/water separator? That in-line filter doesn't hurt to be...
  3. J

    Mercruiser 888 Unexpected Prop behavior?

    the 19 might put you over wot rpms when by yourself but as you load the boat down then your rpms will be in the specified range. Depends on what you want.
  4. J

    Mercruiser 888 Unexpected Prop behavior?

    "any thoughts?" if jimmbo is right, you were only 400 rpm below the max. Increasing the diameter, # of blades, and pitch, decreases rpm's. The same diameter, blade count, and pitch can still give different results with different manufacturers.
  5. J

    Mercruiser 888 Unexpected Prop behavior?

    The only #'s that matter are what's current. If your concentration is on 60 mph, then the motor isn't making it for whatever reason. It's not the prop. Props are for fine tuning. You want 4200-4500 @WOT....speed is irrelevant.....
  6. J

    Mercruiser 888 Unexpected Prop behavior?

    "(which reportedly could hit 60MPH)." and can't rely on "reportedly".
  7. J

    Mercruiser 888 Unexpected Prop behavior?

    "Any thoughts?" I prop for proper manufacturer's recommended RPM @WOT. So 3700 rpm@wot would be lugging my motor. The resulting speed is irrelevant. Prop diameter also affects rpm results.
  8. J

    wiring diagram

    50 amps?
  9. J

    wiring diagram

    yep. you have to "do it yourself"
  10. J

    Trailer tires.

    b
  11. J

    Oil 4 stroke Mercury 115hp

    oil is oil....got it. But when you have a new motor that cost $12,000 you're taking a huge gamble under warranty by not following the owner's manual, especially when it comes to oil specs. And I do believe there is some truth to manufacturers engine designers specific oil spec requirements for...
  12. J

    pontoon engine pod replacement

    I've owned my used pontoon since 2017. I've researched all aspects and items including getting new pontoons. I've never seen any type of reference to replacing motor pods. Are you sure about your motor height mounting position being correct? I've looked at pics of monarchs and the transom angle...
  13. J

    Exhaust manifold discovery?

    fwiw. The 2 years in the brackish upper chesapeake with my new in 2021 Merc 115 has not hurt it. Just changed the impeller and checked the thermostat. No signs of corrosion. It does get a fresh water 2day lake run every summer, guess that helps.
  14. J

    Oil 4 stroke Mercury 115hp

    I bought a new Merc 115hp CT in 2021. 10w-30 Merc/quicksilver synthetic is recommended. I'd not deviate from that especially under warranty. I don't have my manual in front of me, but 20w-50 I think is acceptable.
  15. J

    18ft Boat Launch with RWD Suburban

    That's true. I do tow/launch my 24' pontoon with my '08 extended cab, long bed, 5.3, Silverado 2WD ( Posi). I haven't been to a lot of places however.
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