Engine 19HP twin only runs with choke 1/2 on

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katbird

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• Feb 28, 2019 / 19HP twin only runs with choke 1/2 on

• #1

I have replaced air filter, plugs, checked gas and engine will still only run smoothly with choke 1/2 on
B&S 19HP
Any suggestions?

 

Last edited: Feb 28, 2019

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Darryl G

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• Feb 28, 2019 / 19HP twin only runs with choke 1/2 on

• #2

I'd replace the fuel and start with fresh but it sounds like it's starving for fuel, so there's likely a restriction in the tank, the lines or most likely the carburetor.

 

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helomech

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• Feb 28, 2019 / 19HP twin only runs with choke 1/2 on

• #3

Usually a dirty carb. Going to have to take it apart and clean the small orifices real good.

 

Fish

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• Feb 28, 2019 / 19HP twin only runs with choke 1/2 on

• #4

Find the engine's model numbers and put them up.

 

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katbird

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• Feb 28, 2019 / 19HP twin only runs with choke 1/2 on

• #5

Fish said:

Find the engine's model numbers and put them up.

Click to expand...

BRIGGS & STRATrON ENGINE-MODEL NUMBER 461707, TYPE NUMBER 0145-E3

 

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cruzenmike

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• Feb 28, 2019 / 19HP twin only runs with choke 1/2 on

• #6

You could always remove the fuel line from the tank and start work clearing all of the lines and flushing the tank out. Then replace your fuel filter and get some fresh gas. At that point you can always move to the carb and work on a rebuild. Ethanol in our modern day gas does damage to the rubber parts in the carb. And even the smallest bit of contamination in the path of fuel flow can be problematic. If there is a fuel shutoff solenoid it could also be sticking somewhat but I would think that to be unlikely.

 

Fish

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• Feb 28, 2019 / 19HP twin only runs with choke 1/2 on

• #7

On the bottom side,
there is a plug that you need to remove, and inside that passage, you need to remove the inner jet, takes an allen wrench.

Take it out, old gas/junk will dribble out. Clean that jet, re-assemble.

https://www.jackssmallengines.com/j...sets-carburetor-1-kit-gasket-sets-fuel-pump-1

 

Fish

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• Feb 28, 2019 / 19HP twin only runs with choke 1/2 on

• #8

Looking at the model number is key to giving any sound advice.

 

Fish

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• Feb 28, 2019 / 19HP twin only runs with choke 1/2 on

• #9

BTW, the last number/code, is the mfgr date of the engine.

 

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helomech

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• Feb 28, 2019 / 19HP twin only runs with choke 1/2 on

• #10

Fish said:

Looking at the model number is key to giving any sound advice.

Click to expand...

Not for this problem, it happens on every model of small engine. Boats, lawn mowers anything with a small 4 stroke engine. If you have to add choke, it is getting to much air for the fuel. That means that not enough fuel is getting through the carb, if the bowl is full of fuel than it is a clogged jet.