Technical Flooding carb on pre evo Rotax 125

[Perfectpete]

Restoring a 2002 solo kart and Rotax engine.

Have rebuilt carb with new float needle and seat, all new jets etc. Mikuni pump also overhauled and working well.

Problem is the carb floods the engine so I cannot get it to run right - it's as if the float needle is not sealing off and the pump is forcing excess fuel into the bowl. With Airbox off, you can see fuel pumping out of the very bottom air orifice of the carb inlet mouth.

Have rechecked everything and set float arms to the 3mm level specified.

Anyone any ideas?



Pete

 

[Adam]

Welcome to the forum!

Have you installed the fiber washer under the fitting which holds the sprung loaded needle, under the float arms? And is the rubber on the bottom of the spung loaded needle intact?

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[Perfectpete]

Hi,
Thanks for the response. Turns out I had the floats the wrong way up!

Regards Pete

 

[Adam]

Hi,
Thanks for the response. Turns out I had the floats the wrong way up!

Regards Pete

Oh yeah, that'll do it! Glad it was an easy fix Pete