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15 year old brand new engine

in 2 Stroke Technical Questions 13 years ago
I recently bought an ultralight that was kitted new in 1997 and never completed. I am nearly ready to break in the 447 Rotax. The engine manual is very specific in running about 63 minutes at specific RPM's for a specific amount of time.It is the original Rotax manual that was included with the engine package,so does this still hold true today? Also I bought Pennzoil 2-stroke oil for the 50/1 mix. I have read a lot of forums and this seems to be the one most often recommended and it is easily bought at auto parts store. any thoughts?----------rick

  • Re: 15 year old brand new engine

    by » 13 years ago

    Rick,

    If the engine was preserved properly, it may be OK. fifteen years is a long time and you should pay particular attention to all rubber parts in the engine. Crankshaft oil seals could be a problem and you could have crank bearing and piston pin bearing corrosion. It really should be disassembled and new seals installed and bearings inspected. If you do to break it in as is, the break in sequence is still the same and should be adhered to. If you use Pennzoil, be sure and use the oil for aircooled 2 cycle engines, not the marine type 2 cycle oil.

    Bill.
      
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  • Re: 15 year old brand new engine

    by » 13 years ago

    I'm with Bill.
    Replace all the rubber components. You don't want to start this and possibly ruin a good engine. Time breaks down all rubber. It isn't always and many times not the wear that kills the rubber, but time just sitting. It is easier on rubber parts to be run on at least a semi regular basis.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
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  • Re: 15 year old brand new engine

    by » 13 years ago

    Thanks, I had most the head bolts out to make & mount the muffler brackets so I removed heads to inspect and there was no sign of any rust, looked like it was built yesterday. Can you recommend where to buy the seals? I will obtain then tear down to inspect. ------rick
      
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  • Re: 15 year old brand new engine

    by » 13 years ago

    Several places to shop. California power systems (airwolf) usually has any parts you need. Also Lockwood aviation or leading edge airfoils (leaf). All of them sell genuine rotax spares.

    Bill.
      
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  • Re: 15 year old brand new engine

    by » 13 years ago

    Rick are you experienced at working on these seemingly simply engines....lots of special tools req to strip them down...prob a lot cheaper to get a shop to take it to bits and save $$$$$ buying them yourself,

    I did consider myself a component mechanic after years of stripping and re-building auto engines...but there where lots of things I needed to brush up on before I would let myself loose on my 503.

    Nick.
      
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