My dad has a Farmall B that does not want to start easily.
This tractor has an [b:9689e707ae]H4 mag[/b:9689e707ae] but has [b:9689e707ae]6V electric start[/b:9689e707ae].
The tractor has new autolite 3116 plugs, new copper core wires.
I times the tractor per the many posts I have found on this forum.
Pull the No. 1 plug and put your finger in there to feel when it is on the compression stroke. Then look in the plug hole to find TDC. Then check the rotor to make sure it is pointing to No. 1 plug wire.
All was good. We would get a few pops here and there but no start. No throttle condition or choke condition made a difference.
I checked the intake for obstruction and there was none. Replaced the oil in the oil bath. Still no change.
Pulled the plugs and noticed they were dry... Fuel problem?
Added 2 gallons of fresh gas and pulled off the fuel line and had good flow to the carb. (This carb is freshly rebuild by the way. New gaskets, jet, needle & seat, and all passages clean and free.)
Since I had the pre cleaner off I put my hand over it to see if I felt suction as my dad cranked the electric start. I felt suction and it started popping more. Tried again and it started..... Shut it off and tried again. Same result. [b:9689e707ae]We figured out it would only start with my hand over the pre cleaner hole and the throttle all the way closed.[/b:9689e707ae] Choke position made no difference and I double checked the choke was opening and closing properly.
So now I'm thinking vacuum leak. The gasket between the carb and intake was fresh. I tried the old one and no change, tried making a new one out of cork gasket material, no change. I looked for holes in the manifold, but it was hard to tell, I was fresh out of carb cleaner so I was not able to spray around while it was running to listen for changes.
So all that being said, what am I dealing with here? Intake manifold hole?
Again here is a checklist of all that was tried through this ordeal.
- New plugs autolight 3116 gapped per I&T manual
- New copper core wires
- mag coil is new
- 4 different condensers tried 3 of them brand new from tisco
times tractor per procedure mentioned above
- carb rebuilt
- Air cleaner working
- Tried 3 gaskets on carb to intake
Sorry for the very long post, just trying to tell the whole story.
This tractor has an [b:9689e707ae]H4 mag[/b:9689e707ae] but has [b:9689e707ae]6V electric start[/b:9689e707ae].
The tractor has new autolite 3116 plugs, new copper core wires.
I times the tractor per the many posts I have found on this forum.
Pull the No. 1 plug and put your finger in there to feel when it is on the compression stroke. Then look in the plug hole to find TDC. Then check the rotor to make sure it is pointing to No. 1 plug wire.
All was good. We would get a few pops here and there but no start. No throttle condition or choke condition made a difference.
I checked the intake for obstruction and there was none. Replaced the oil in the oil bath. Still no change.
Pulled the plugs and noticed they were dry... Fuel problem?
Added 2 gallons of fresh gas and pulled off the fuel line and had good flow to the carb. (This carb is freshly rebuild by the way. New gaskets, jet, needle & seat, and all passages clean and free.)
Since I had the pre cleaner off I put my hand over it to see if I felt suction as my dad cranked the electric start. I felt suction and it started popping more. Tried again and it started..... Shut it off and tried again. Same result. [b:9689e707ae]We figured out it would only start with my hand over the pre cleaner hole and the throttle all the way closed.[/b:9689e707ae] Choke position made no difference and I double checked the choke was opening and closing properly.
So now I'm thinking vacuum leak. The gasket between the carb and intake was fresh. I tried the old one and no change, tried making a new one out of cork gasket material, no change. I looked for holes in the manifold, but it was hard to tell, I was fresh out of carb cleaner so I was not able to spray around while it was running to listen for changes.
So all that being said, what am I dealing with here? Intake manifold hole?
Again here is a checklist of all that was tried through this ordeal.
- New plugs autolight 3116 gapped per I&T manual
- New copper core wires
- mag coil is new
- 4 different condensers tried 3 of them brand new from tisco
times tractor per procedure mentioned above
- carb rebuilt
- Air cleaner working
- Tried 3 gaskets on carb to intake
Sorry for the very long post, just trying to tell the whole story.