582 Blue head overheating problem

by Ian Jones in 2 Stroke Technical Questions 12 years ago

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Re: 582 Blue head overheating problem

by bill martin » 12 years ago

bill martin

10 757 0

Ian,

Sounds like your engine is is in good tune. That being the case, propeller pitch is the only thing that controls max. RPM. You are not developing full horsepower at 6200 and that could also be part, but probably not all, of the overheating problem.

If you have no internal method of balancing the blades, You can use small pieces of leading edge tape or paint the blade tips. You would be surprised what a little bit of paint can do to propeller balance.

Sometimes new motor mounts can help with vibration, but with a 582, vibration is something you may have to live with below 2000 RPM.

Bill.

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Re: 582 Blue head overheating problem

by Nick Axworthy » 12 years ago

Nick Axworthy

16 325 0

Have you physically checked your throttle slides are fully opening with the air filter removed,

WOT the with a finger the slide should only raise a few more mm.

Nick.

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Re: 582 Blue head overheating problem

by bill martin » 12 years ago

bill martin

10 757 0

Ian,

You mentioned you were going to check the timing. Bad timing could cause cause all three of the symptoms you mention. Overheating, loss of RPM, and rough idle.

Bill.

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Re: 582 Blue head overheating problem

by Alan Arnold » 12 years ago

Alan Arnold

20 188 145

Ian,

I had a 582 several years ago and had the same problems as you with no web forum to help me. To make a very long story quite short, the overheating problem was airflow through the radiator. Even though my radiator was mounted per the Kitfox manual, I had to lower it 3-1/2 inches in order to get enough air flowing through it to provide cooling. Easily done, but maybe not your problem.

As for the RPMs being too low, I ran my engine for 130 hours until it lost a rod bearing. With a new engine, gearbox, and prop, I had the exact combination as called for with the prop setup instructions. I pitched the prop exactly per their instructions and had the same low revs. I had to pitch the prop much flatter to get the correct RPMs. After about 10 hours I decided to set it up exactly per instructions and fly it. Wow! It climbed out much better! I acquired a model airplane handheld tachometer and checked the revs with the new setting. I was then getting the correct rpms. My panel mounted tach was off by quite a bit. I plotted a curve using the corrected revs and found I had been taking off way above red line and cruising right at red line for 130 hours. All because of a bad tach.

Check your tach.

Alan

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Re: 582 Blue head overheating problem

by Ian Jones » 12 years ago

Ian Jones

2 53 0

Thanks for all your replies.
The tacho has been checked and is accurate.
I'll be checking all the other things as listed above once I can get to the hangar next week.

Pud

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582 Blue head overheating problem

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