OzVMX Forum

Clubroom => Tech Talk => Topic started by: John Orchard on October 19, 2018, 04:02:23 pm

Title: VM38 one float higher!
Post by: John Orchard on October 19, 2018, 04:02:23 pm

What am I not considering? The floats on my OEM Kawa VM38 live in the bowl and slide up & down on posts fastened to the bottom of the fuel bowl.

With bowl off the carb body, I filled the bowl with fuel, I wanted to take a measurement of where the lift-pins sit, that lift the arms that close the needle & seat, when the bowl is full of fuel.

One float sits about 3mm higher than the other, there is no liquid in the float, they are both the same size, they both have about 1.5mm clearance from the side-wall of the bowl.

I wonder if the uneven lift pressure on the needle & seat closing arms would effect smooth needle operation?

Ideas?  :-)

Title: Re: VM38 one float higher!
Post by: bazza on October 20, 2018, 09:51:25 am

One of the posts bowl slides on not bent?

Title: Re: VM38 one float higher!
Post by: John Orchard on October 20, 2018, 11:01:48 am

Nope, not bent. l wonder if a different internal air pressure? Or the plastic is thicker in one?

l have another old carb here, l checked the floats in it; equal, l'll run with it :-)

Title: Re: VM38 one float higher!
Post by: 80-85 husky on October 20, 2018, 12:21:48 pm

helium in one float, air in the other? set up for short circuit??  ;D ;D

Title: Re: VM38 one float higher!
Post by: Curtis on October 22, 2018, 10:18:48 am

Try weighing the floats?

Title: Re: VM38 one float higher!
Post by: John Orchard on October 22, 2018, 08:25:59 pm

Quote from: Curtis on October 22, 2018, 10:18:48 am

Try weighing the floats?

Good point :-)

Title: Re: VM38 one float higher!
Post by: Hoony on October 23, 2018, 04:42:09 pm

common on J O ...what is outcome  ;D

Title: Re: VM38 one float higher!
Post by: 80-85 husky on October 23, 2018, 06:38:55 pm

bathroom scales allready maxed out ;D ;D

Title: Re: VM38 one float higher!
Post by: fred99999au on October 23, 2018, 07:27:19 pm

Funny, I have a mate with this affliction. Apparently one is atrophied. Still made two kids though

Title: Re: VM38 one float higher!
Post by: John Orchard on October 23, 2018, 08:45:24 pm

Quote from: Hoony on October 23, 2018, 04:42:09 pm

common on J O ...what is outcome  ;D

Have not followed it up, I just switched to a pair that are equal  :-)