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447 runs but dies under 3-4000 rpm

by Joel Winter in 2 Stroke Technical Questions 6 years ago

Any ideas?

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Re: 447 runs but dies under 3-4000 rpm

by Joel Winter » 6 years ago

Joel Winter

1 5 0

It will not idle.

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Re: 447 runs but dies under 3-4000 rpm

by Bill Hertzel » 6 years ago

Bill Hertzel

13 1.95k 7.98k

A wild guess would be that there is a problem with the Idle circuit ports.
Try cleaning the carb.

Look in the Float Bowl first.
If it has any debris, you are on the right track.

Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

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Re: 447 runs but dies under 3-4000 rpm

by Dennis Richardson » 6 years ago

Dennis Richardson

1 153 169

The first thing I would do is clean the carb/carbs, in particular the idle jet and idle circuits.

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Re: 447 runs but dies under 3-4000 rpm

by Andrew Dunning » 6 years ago

Andrew Dunning

1 31 86

Make sure you are running 50:1 ratio.
We had a bloke at our airfield that thought 40:1 would be safer but it wouldn't idle, we changed his fuel with the correct ratio and it idled fine.

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Re: 447 runs but dies under 3-4000 rpm

by Joel Winter » 6 years ago

Joel Winter

1 5 0

Drained the tank and replaced with fresh 50:1 fuel. Disassembled carberator twice and cleaned it. Still no luck...

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