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Recent content by naio83

  1. naio83

    Mariner 70hp 1979/1980 - water pump lower housings stuck?

    OMG!!! That flush plug was the key (I had to remove 2 studs also), thank you very much for your help!!!
  2. naio83

    Mariner 70hp 1979/1980 - water pump lower housings stuck?

    Hi experts, I am facing some issues with a replacement than I am doing, and I definitely need some help. Engine: Mariner 70HP, 2T, 3cil, 1979/1980. Task: Water pump kit replacement (first time doing it). I have bought the kit (Quicksilver 77177A3) and it came with the full water pump kit, so my...
  3. naio83

    Mariner 70hp 1980 - Moving from mineral oil to s-synthetic / synthetic oil

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  4. naio83

    Mariner 70hp 1980 - Moving from mineral oil to s-synthetic / synthetic oil

    Thanks RacerOne, on my local shops I am having confusing info, some ones tell me that is the same, others that while they are TCW3 compliant they are ok, and others that if the engine is made to use minerals it should not use another one...
  5. naio83

    Mariner 70hp 1980 - Moving from mineral oil to s-synthetic / synthetic oil

    Hi all, I have a 70hp Mariner engine (3 cil and 2 carbs) from 1980. For the last months (years) I have been using Evinrude XD 30 for 2 Cycle outboard oil for the fuel mixture, that in the case of my engine is done manually in the tank. As far as I know, this is a mineral oil. Unfortunately...
  6. naio83

    Prop replacement for 1980-70HP MARINER

    Hi, I have a 1980 3cil, 2 carbs, 70HP Mariner, installed in a 4.5 meter fiberglass boat and the boat + engine are less than 500 kilograms of weight. We are usually 2 or 3 in the boat, exceptionally 4 (220 - 300 kilograms), the use is in fresh water, no tach installed but top speed with GPS and...
  7. naio83

    Mariner 70hp 1980 - fuel pump, filter & line maintenance

    Hi all, I was making some maintenance to the fuel_line and I would love some pieces of advice on these 3 topics: 1) This engine has a circular fuel filter with a metallic part, red square (part 32), inside which replacement is very hard to find nowadays (at least where I live) so the advice...
  8. naio83

    Mariner 70hp poor Acceleration

    Hi to all, and thanks for accepting me on the forum. This is my first post. I have a 1980 2T, 3 cylinder, 2 carb, 70hp Mariner on a 15 boat. Most of the time it was stored and with very little use. At the beginning of this year I started to put it into value again to start using it since it...
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