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Ask Bradley Martin Your Own Question
Bradley Martin
Bradley Martin,
Category: Agriculture and Farm Equipment
Satisfied Customers: 175
Experience:  Field Technician at Thompson Tractor Company
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425 tractor wont start, seems to be pumping too much gas

Customer Question

425 tractor wont start, seems to be pumping too much gas into engine and if pull plugs they are wet and exhaust is discharging raw gas out. to prove that held propane torch to exhaust and small flashes of flame are present
Submitted: 11 months ago.
Category: Agriculture and Farm Equipment
Expert:  Curtis B. replied 11 months ago.

Wet plugs, have you checked for spark at the plugs? With twin engine, you would have to loose spark to both sides to not start. For carburetor to flood the engine, the needle valve and float would have to be not shutting off the fuel incoming from the tank.

Expert:  Curtis B. replied 11 months ago.

If no spark, the engine has dual pickup coils, dual coils , but a singe igniter. So igniter would be suspect.

Expert:  Curtis B. replied 11 months ago.

Here is test for igniter, see link below.

Customer: replied 11 months ago.
It is not an ignitation problem it is excess fule
Expert:  Curtis B. replied 11 months ago.

Did you check it for spark? If it has spark, the carburetor would be the fault. But if no spark, carburetor may not be.

Customer: replied 11 months ago.
It is not a ignitation problem it is excess fule
Expert:  Curtis B. replied 11 months ago.

If you won't check for spark, I can't make you. But cylinder will flood if there is no spark. I will opt out and let someone else help. Please do not respond to me or it will lock your question. Sorry.

Expert:  Bradley Martin replied 11 months ago.

Has the carburetor been replaced?