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Thread: Anything to check on a rotax 503 nor running for a while

  1. #1
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    Default Anything to check on a rotax 503 nor running for a while

    Hi

    Ive got a moto craft with a 503 engine which has been garaged but not run for about 2 years. Are there any recommended checks to do on the engine before trying to start it up?

    THanks!
    Nic

  2. #2
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    Default Re: Anything to check on a rotax 503 nor running for a while

    Do you have the operators manuals for this engine? If not, please pm me with your email and I'll send them.

    Ross

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    Default Re: Anything to check on a rotax 503 nor running for a while

    Thanks Ross. PM sent off!

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    Default Re: Anything to check on a rotax 503 nor running for a while

    Hi,

    Drain all fuel from carbs, replace fuel line and filter, flush the tank.

    Squirt oil into the barrels before turning over, make sure you get a nice coating round the pistons and in the bearings. Might make it a bit harder to start but might save excessive wear.

    Clean filters. Check for no obvious dirt and crap in places it shouldn't be. Have a peek at the pistons through inlet and outlet ports to check they look ok.

    Check plugs and clean/renew if necessary. Check head bolts are correct torque.

    Check ALL mounting bolts are done up tight. This includes engine to frame and frame to craft. Check also that any rubber mounts haven't perished, don't want the engine coming loose!

    Also give the fan a once over, should be fine but don't really want to run it if they have major cracks in.

    Then pull the string, get it warmed up before you rev it. If it is a nightmare to start the crank oil seals may have perished a bit which can happen if the engine is left for that long without being turned over.

    Good luck

    Nick

  5. #5
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    Default Re: Anything to check on a rotax 503 nor running for a while

    Thanks Nick, I'm going to give it a go. I'll let you guys know how i get on!

  6. #6
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    Default Re: Anything to check on a rotax 503 nor running for a while

    So, did it run then?

    Nick

  7. #7
    Forum God > 400 posts Club Member Jon Pert's Avatar
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    Wink Re: Anything to check on a rotax 503 nor running for a while

    Quote Originally Posted by Nick Drew View Post
    So, did it run then?

    Nick
    Normally when you don't hear anything it means they are still trying to catch all the bits that are falling from the sky!
    Cheers

    SixpackPert



    "Computer games don't affect kids. If Pacman would have affected us as children, we would now run around in darkened rooms, munching pills and listening to repetitive music"

  8. #8
    Very active > 100 posts Family/group Member peach4730's Avatar
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    Default Re: Anything to check on a rotax 503 nor running for a while

    Quote Originally Posted by Jon Pert View Post
    Normally when you don't hear anything it means they are still trying to catch all the bits that are falling from the sky!
    nice one jon.

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