Engine maintenance - RCCanada - Canada Radio Controlled Hobby Forum
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Old 08-20-2004, 07:32 AM   #1
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Engine maintenance

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I finally got my engine back onto my float plane, and discovered a new problem. It won't run right anymore! There is poor idle, and it has a tendency to rev every now and then. When I adjust the needle valve, I can see there is rust coloured fuel leaking out. I did put a piece of tubing over the area to seal the leak.

Should I just let her run for a while to blow the rust out? Or should I be taking the head off and rinsing it out with something?
Adam S.
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Old 08-20-2004, 08:07 AM   #2
Ed Smith

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Is it rust in the engine or just old dirty fuel that was left in the tank?

Taking the head off will not show you much. There is nothing up there to go rusty. Take the engine out of the airplane and take the backplate off. You should be able to see the rear bearing and be able to see if it is rusty.

If there is rust inside I would take the whole engine apart. Rust starts on the steel parts, bearings, crankshaft, wristpins etc. If you have run it and rusty sludge is leaking out then the damage is well on the way. Take it apart and clean everything thoroughly. Inspect the bearings for rust/damage. Replace if they look bad. If there is rust on the crankshaft or pins polish with a very fine emery cloth. Those items are hardened, you will not remove metal with a fine cloth.

Ed s
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Old 08-20-2004, 03:25 PM   #3
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Unfortunately, , I don't know how to take this engine apart. The head bolts have stripped heads, and I don't want to re-tap the holes if I know someone else can get them out. I do see the bearings, and they seem a little rust covered.

Thanks for the help Ed.

BTW, is there anyone in the area who does engine maintenance?
Adam S.
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Old 08-20-2004, 03:52 PM   #4
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Re:the head bolts being stripped out!! just carefully "slot" them with your dremel tool and then remove with a flat head screwdriver..ive done this many times on stripped socket heads
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Old 08-20-2004, 05:08 PM   #5
Frank Klenk
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I am: Frank Klenk
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Hi Adam
I can help you out. Send me a pm with your phone number and we can set something up. I'm in Tillsonburg, not far from you.

Frank Klenk
MAAC 32001L
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