cknightsbridge(at)hotmail
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 Posted: Sun Nov 29, 2009 2:50 pm Post subject: Rotax 503 Repair DVD |
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G'day C
My apologies for the late reply.
I have just order and received this excellent Rotax 2 stroke repair DVD
http://www.homebuilthelp.com/New_Rotaxengine.htm
HomeBuilt offer a similar DVD for the 912
Extract:
If you can't attend a Rotax engine workshop C then owning this DVD is the next best thing!
Alan Laymon C owner of Solo Aviation C an authorized Rotax repair station with 10 years of experience with 2 cycle aircraft engines C explains in clear language at each step of his inspection process as he disassembles an engine. You can now see and understand what procedures are involved with the 150 and 300 hour inspection/rebuild services. Alan points out the places carbon accumulates C where the common areas of wear occur C and other signs indicating the possibility of potential failures. The specialized Rotax engine tools are demonstrated as to their function in removing various internal components. Installation and maintenance tricks are also demonstrated and explained for the purpose of heading off future engine failures that can lead to disaster.
Some of the areas and functions of the engine that are demonstrated in detail include:
- One of the most detailed carburetor overhauls you have ever seen - with clear explanations at each step!
- What comes in a carb rebuild kit... where do all the pieces go?
- Identification and removal of all carb jets and float adjustment
- Overwhelming evidence of what moisture does inside your engine
- How moisture gets into your engine!
- The proper way to clean and re-oil those air filters
- Where carbon accumulates inside the engine C and what components have to be removed to clean it off!
- Some examples of the impact of using unofficial Rotax parts in an aircraft engine
- How the fan belt is adjusted and removed
- How the cross shaft is removed
- Operation of the specialty tools for component removal and the consequences of not using them
- Common problems to avoid when re-installing heads
- How the throttle cable attaches to the carburetor
- Things to look for when inspecting a used engine
- How to replace the cord on the recoil starter
- What to examine in the B and E gearboxes
Chas
Melbourne AU
| Quote: | Subject: Re: Rotax 503
From: rmwis(at)charter.net
Date: Sun C 29 Nov 2009 13:42:32 -0800
To: rotaxengines-list(at)matronics.com
--> RotaxEngines-List message posted by: "rayw" <rmwis(at)charter.net>
Just wanted to update on the problem. I finally had a chance to run it yesterday after gapping the plugs to 0.018". It seemed to run a tad smother but did not help it gain any RPM. Last night I decided to swap carbs from left to right and try the "three finger test" again. While I had the carbs off I decided to pull all the jets and again verify the sizes. The sizes were all proper. I used a magnifying glass to look carefully at each one. I could see light through each jet when I held it up. before reassembling the carbs I took the main jet and needle jet and gently inserted the needles into each jet just to see how far they would go up the taper of the needle. One of the Main jets did not go as far as the other. I gently twisted and heard (more like felt) a subtle snap. The jet then slid up the needle as far as the other main jet would go. The best way to describe it is there was a crust build up in side the jet. Prior to this I did spray the jets out with carb cleaner but !
now I know that was not enough. Took it out today and tied it down and got it to run up to 6200 RPM.
Thank you again for all the helpful suggestions.
Ray W.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=275346#275346
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