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Gt-300 v8 1989

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  • Gt-300 v8 1989

    Hi there,

    I’m new on this forum and all the way from the Netherlands, so excuses me already for language issues. I have just bought an Piranha Carrera with a Johnson GT300 V8 and i can’t wait until I can test it on the water. It has been standing for 12 years insight a barn so it needs a little love and care. My first problem is where to find al the right information about parts and technical specs. A site as boatnet helped al little but not enough. Is there someone who can help find something like a service manual or anything? it’s a j300plcem-1989 made in the USA. Also when you have some tips/tricks with these engine please let me know. I have already understand that its better to put some extra bolds from the outside into the bearing carrier from the prop axle because it can come loose.

    Best regards Erik Jansen

  • #2
    Hi Eric, you have bought a Beast!
    Parts catalogs can be found here on boats.net, https://www.boats.net/catalog/johnso...j300plcem-1989
    Some parts are discontinued and going to be hard to find.
    Manuals can be found at https://www.outboardbooks.com/
    Regards
    Boats.net
    Johnson Outboard Parts

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    • #3
      hi there Johnson owners.
      Is there somebody who knows what the timing specs are for this engine Johnson GT300 j300plcem-1989? I have some starter problems and i think its the timing. Also i would like to know what the best fuel pressure is. My pump is adjustable

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      • #4
        https://youtu.be/whxFKnY20ts

        This was our first run

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