CitrusGrower
Member
I put new pistons and valves in my Z145 engine in a Massey Ferguson 30B tractor (similar to a 135). It runs well to do work, but I have to set the idle up to 1200 to keep it from stalling.
There is fair sized piece of rubber tubing (3/8") that connects just upstream of the carburetor and runs to the valve cover vent and the intake manifold. It seems like a huge vacuum leak to me so I clamped off the line going to the intake manifold and the engine runs much better.
What's the purpose of this line? And am I missing a part like a check valve or small orifice? All I've got is tubing and a metal T connecting the 3 pieces of tubing together.
I'd swear this is the way it was originally, but that big connection to the intake manifold makes no sense to me.
There is fair sized piece of rubber tubing (3/8") that connects just upstream of the carburetor and runs to the valve cover vent and the intake manifold. It seems like a huge vacuum leak to me so I clamped off the line going to the intake manifold and the engine runs much better.
What's the purpose of this line? And am I missing a part like a check valve or small orifice? All I've got is tubing and a metal T connecting the 3 pieces of tubing together.
I'd swear this is the way it was originally, but that big connection to the intake manifold makes no sense to me.