300 won't pump gas

sd300 · Post by **sd300** » Mon Jan 03, 2011 1:38 pm

got the familys 300 from my brother our dad bought it new. My brother could not get it running so he gave it me.

he put a carb kit in. the machine wont pump its own fuel. the pulse line seames ok there is a push and pull. it will run if i keep feeding it gas through the intake

any ideas , I was going to takeapart the carb-pump and make shure everthing is there.

Thanks Bob

HoosierDeereMan · Post by **HoosierDeereMan** » Mon Jan 03, 2011 6:49 pm

Bob,

Before I took the carburetor apart I would check the pick up line inside the gas tank. Sometimes the pick up line rots in half and falls inside the tank. If it can't reach the gas you will only pump air! Also inspect the check valve in the end of the pick up line. If there is no check valve the gas line will not stay primed. If the the tank checks out I would question if the metering lever is set right in the carb. If it isn't set correctly from .005" to .020" it may cause it to not run right or not pump fuel at all.

Good Luck,

Troy

sd300 · Post by **sd300** » Mon Jan 03, 2011 9:36 pm

yeah i forgot to mention

the pickup filter/check valve is new and I replaced the line in the gas tank.

Meatering arm measurments? I know what the arm is but not shure where to measure?

Thanks bob

HoosierDeereMan · Post by **HoosierDeereMan** » Mon Jan 03, 2011 11:14 pm

Bob,

You will have to take all the sandwich plates off the bottom of the carb so you can get to the needle and seat. Turn the carb upside down in your hand and use a feeler gauge to measure how far the metering lever is sticking up above the base of the carb with the needle closed. If it's not .005" to .020" bend the tab end that engages the needle and seat until you get the height correct.

Just another thought but are your fuel lines attached to the carburetor correctly?

Bottom center is the fuel in from tank.
Bottom off set side is the vacuum pulse that runs to the crankcase.
Elbow fitting on the side is the return to the tank.

Troy

JDT · Post by **JDT** » Mon Jan 03, 2011 11:17 pm

Troy I think you got that wrong.
Side fitting is the impulse line.

HoosierDeereMan · Post by **HoosierDeereMan** » Mon Jan 03, 2011 11:20 pm

Good catch Todd! Thanks for setting the record straight!

Troy

sd300 · Post by **sd300** » Mon Jan 03, 2011 11:37 pm

I have the lines right.
i need to pull the carb appart and check the arm

Thanks For all the info

Bob

300 won't pump gas

300 won't pump gas

Re: 300 won't pump gas

Re: 300 won't pump gas

Re: 300 won't pump gas

Re: 300 won't pump gas

Re: 300 won't pump gas

Re: 300 won't pump gas