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  1. #1

    GPR Engine Assembly Instructions (PDF)

    http://www.hydrotoys.com/gpr/tuners/...neAssembly.pdf

    * Never ever re-use seals
    * Always use Loctite
    * Be careful when buying a used crank
    * If rebuild by someone else demand OEM bearings, seals and rods.
    * Dont rebuild your engine with a 100+ hours tired crank.
    * If rebuilding an engine with an older flywhel have it inspected and re-balance.
    * Don't bother looking for another crank sealer. 3Bond 1211 is an excellent product, a bit more expensive than the others but it's affordable.


  2. #2
    Hydrotoys's Avatar
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    One thing to notice is how CLEAN Fernando keeps his area, while assembling. This is very critical on assembly. Take the time to clean out your work and storage area for the assembly.

  3. #3
    Moderator RX951's Avatar
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    Thumbs up

    Always be Meticulous people !

    Thanks Fernando, I also made this a sticky and rated it a 5 Star
    I also copied it to the How-To section.

  4. #4
    Chrisrokc's Avatar
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    This PDF is a must have!

  5. #5
    Duke's Avatar
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    I print these out and add them to my GPR binder. Nice for reference.

  6. #6
    River Rat chevyll's Avatar
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    Good info, thanks for posting it.

  7. #7
    awesome, thanks

  8. #8
    Thanks for the post! I'm in the middle of a rebuild myself and have read this many times. Can you explain a little better how to lubricate the crank after it's installed. Also, how does the crank receive lubrication while running? Or are the bearings sealed and don't require external lubrication? Should extra oil be put in the bottom of the case? Thanks.

  9. #9
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by mi11ertyme26 View Post
    Thanks for the post! I'm in the middle of a rebuild myself and have read this many times. Can you explain a little better how to lubricate the crank after it's installed. Also, how does the crank receive lubrication while running? Or are the bearings sealed and don't require external lubrication? Should extra oil be put in the bottom of the case? Thanks.
    crank recieves lubrication via the oil mixed with the fuel

    I use a cooking injection syringe to lube points in the motor (get at any grogery store)

    #1 pic of pre-lubing crank
    #2 pic shows the holes in the cases to inject 2 cycle oil for bearings
    #3 shows how to use the exhaust manifold bolts to make a stand
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  10. #10

    Thanks!

    That's exactly what I needed. I would have never known that.

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