James Williams
Well-known Member
Does anyone know the proper float setting for a F12 carb.
jimmy
jimmy
- Thread starter James Williams
- Start date
John M
Well-known Member
- Location
- Nunyafn business
1 27/32 is coming to my mind for some reason.
James Williams
Well-known Member
John,how is this measured
jimmy thanks
jimmy thanks
Doug Steinbach
Member
Jimmy
I have that info somewhere. I'll try to look it and get it to you.
I have that info somewhere. I'll try to look it and get it to you.
Athol Carr
Member
My copy of "Blue Ribbon Service - Serviceman's Guild Shop Service Manual Undated)" for F-12, O-12,W-12, F-20 through to WK40 tractors states that for the F-12 carburetor one should adjust fuel level to 23/32 - 25/32 inch below bottom of upper body.
John M
Well-known Member
- Location
- Nunyafn business
Thats it! I think thenumbers I had in my head must be from the flat surface to the bottom edge of the float when it closed. I know that number come from somehwere with a 12/14 carb, just not 100% sure.
John M
Well-known Member
- Location
- Nunyafn business
I beleive Athol gave the righ answer, and for the life of me, Im not sure if its with the float open or closed, but I think it may be from the flat surface, to the the top edge of the float, with the float closed. Buy top edge I mean what would be the top of the float when assembled.
Athol Carr
Member
I am not sure how it is measured either, the automotive services firm who rebuilt my O-12 engine rebuilt the carburetor. They had a copy of the manual and seemed to get it right.
I had made all the gaskets, except those for the cylinder-head and manifold, and I had stripped the engine down, they had to hot-tank the block 3 times to get the old sleeves out as there was a crack, not leaking, in the bottom water jacket and they needed to get at from the back to weld it well. They did a great job, cannot see the weld. We put in new sleeves and pistons, reground the crank shaft. They had to rebuilt the governor, all the balls from all the bearings were found in the sump and the rock-shaft from governor to carburetor had been broken at some time and then brazed together where there was meant to be nutted connection. The brazing had destroyed one bearing on the rock-shaft and the debris from that had done the rest. I still need to play with the governor setting to get idle speed down as I cannot get it to idle less than about 1000rpm with the throttle fully closed and full rpm at about half throttle.
I had made all the gaskets, except those for the cylinder-head and manifold, and I had stripped the engine down, they had to hot-tank the block 3 times to get the old sleeves out as there was a crack, not leaking, in the bottom water jacket and they needed to get at from the back to weld it well. They did a great job, cannot see the weld. We put in new sleeves and pistons, reground the crank shaft. They had to rebuilt the governor, all the balls from all the bearings were found in the sump and the rock-shaft from governor to carburetor had been broken at some time and then brazed together where there was meant to be nutted connection. The brazing had destroyed one bearing on the rock-shaft and the debris from that had done the rest. I still need to play with the governor setting to get idle speed down as I cannot get it to idle less than about 1000rpm with the throttle fully closed and full rpm at about half throttle.
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