fuel starvation

bwilso · Nov 7, 2017

My 600 will run for a while and then dies until bowl refills with fuel. I get good flow through fuel line but the flow from bottom of carb does not seem to be as strong. My question is how do I measure sufficient flow? this has been covered a zillion times but I did not write down because have never needed before. A little history-bought the 600 at auction. idled fine but not enough fuel to work farm. Ruined Zenith carb seat trying to change and bought a Marvel since I could not find new Zenith seat. Same issue with new carb. I put new fuel tank on because original was rusted through and have put new sediment bowl assembly on new tank. Thanks in advance for helping me with this.

charlie n · Nov 7, 2017

check the bango bolt that holds the bowl assembly.The hole might not be lined up with the flow.

mhb@ufe · Nov 7, 2017

Disconnect the fuel line from the fuel bowl and check to see if the hole going into the fuel bowl is plugged.

Mark

riveroadrat · Nov 7, 2017

I had the same problem on a 641. After removing carb then bowl. i found out my float needle was sticking in the up position when it wanted to. I checked it quite a few times, sometimes it would stick sometimes it wouldnt. I did something to the float clip or the spring, cant remember. the float needle has 3 edges on it, you might could file a little off the top edges . Mine ran fine after I monkeyed with it. I made sure the float needle would drop every time.

Bob in Tennessee · Nov 8, 2017

I think I have fixed issue and thanks for all your guidance. I was using an inline fuel filter and the restriction t caused may have been a good deal of the problem. also at the suggestion of Rich, I checked the air filter. I had assumed that it could not be clogged from a quick glance at bottom screen but after running tractor with breather hose removed, the performance was so much better I had to revisit filter. the bottom two rolled screen filter elements were fine but the top screen was completely rusted and matted up almost solid. I broke through the mess and poured out the rusted screen, reassembled and now the tractor performs as it should. New fuel line without inline filter and cleared air breather have solved issue.
thanks again

riveroadrat · Nov 9, 2017

Well i just ran my 641 longer than normal and it started running out of fuel. It seems the needle clip was hanging up, I removed the clip, will post back with results.

fuel starvation

bwilso

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charlie n

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mhb@ufe

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riveroadrat

Well-known Member

Bob in Tennessee

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riveroadrat

Well-known Member

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