912 Carb float brackets

The dimension in the diagram is the same, it would be clearer if it said 0.5mm +0.0/-0.1 i.e. 0.4mm to 0.5mm

I hope that makes sense.

I just use a millimeter ruler set on the edge of the grove where the bowl sets into. Slide it over to the brass float armature and see if it reads 10.5mm at the top of the flat part of the armature. Tweak the armature tab the needle valve as attached to if you need to make an adjustment. Nothing to take apart and only takes a minute or so. I do lots and lots of carb overhauls every year and have never had an issue in more than 25 years. This said a .5mm wouldn't make a difference because the floats, fuel flow and engine vibration makes that so. I learned this directly from Bing.

See attached picture directly from Bing

Said it before. Saying it again.

It would be far easier if the float arm measurement was from the centre structure down (with carb inverted). The measurement could then be made, with a single tool, a slide calliper. Very simple. No need for straight edge/millimetre rule etc😈

Hi Sean,

If the carb is off  and the bowl is off it takes me about 1 minute to make any adjustments. It's cheap easy and quick.

Besides in Australia you already use millimeter rulers. Your tool is ready to go. 😁

Your tool is ready to go. 😁 Bit personal Roger😎.

I am not suggesting both your system & the Rotax special tool don't work. Just pointing out there is a handy structure, in the middle of the inverted carburettor, from which it would be so easy to measure down to the float arm (armature I think you like to call it)😈