300 HP Yamaha OB

Discussion in 'Powerboats' started by RANCHI OTTO, Aug 20, 2007.

  1. RANCHI OTTO
    Joined: Apr 2005
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    RANCHI OTTO Naval Architect

    Hi,

    I'm looking for installation drawings concerning the 300 hp OB Yamaha.

    The boat is an high speed defence boat with 4 x 300 hp.

    This is an updated version of the NAJA ASD sold to Gulf country in 40 units (120 OB engines).

    If I will not receive available informations concerning this engine, I will change manufacturer!!

    Help please....

    Thanks
     

    Attached Files:

  2. Willallison
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    Willallison Senior Member

    I'm always mystified as to why it's so easy to get hold of proper installation / CAD drawings for inboard engines - particularly diesels - and all but impossible to get the same for outboards. I share your frustration!:mad:

    The same can be said for outboard performance / consumption data.

    Sadly, I can be of little help. The only success I've ever had has been to approach my local dealer who was able supply hardcopy only.
     
  3. RANCHI OTTO
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    RANCHI OTTO Naval Architect

    Concerning diesel engines, I had never problems with CAD drawings installation.

    For the OB engines I have the consumptions and power vs power measured during sea trials of the NAJA ASD. This boat was equipped with 4 x 300 hp Johnson not more in production....
     
  4. Pericles
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    Pericles Senior Member

  5. RANCHI OTTO
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    RANCHI OTTO Naval Architect

    Thanks Pericles but there are no technical informations....only dealers address...:(

    thanks
     
  6. Pericles
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    Pericles Senior Member

  7. RANCHI OTTO
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    RANCHI OTTO Naval Architect

    Thank you again Pericles.....no 300 hp engines, perhaps old web?
     
  8. Pericles
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    Pericles Senior Member

  9. RANCHI OTTO
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    RANCHI OTTO Naval Architect

    Thanks.....OK! I have send the informatons......:)
     
  10. Bannai
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    Bannai New Member

    Naja Asd

    This 12 meter NAJA with 4 300 Outboard engines. I think this one is the first version
     
  11. RANCHI OTTO
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    RANCHI OTTO Naval Architect

    The STAR NAJA were sold in 12 units to Gulf country. All units reached a speed in excess of 40 knots and for this reason they were all accepted from Navy. The Sofresa with the boat nr. 1504 carried several tests each day for 1 month long with no problems to the engines. Same model was sold to Indonesia Police with full satistaction of the customer...so perhaps the problem was not technical but ...I let the details to you
     

  12. powerabout
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    powerabout Senior Member

    what engines did you go with?
     
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