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How to drain gas on Gravely ProStance or FS600V kawasaki motor.

11K views 12 replies 8 participants last post by  Patriot Services  
#1 ·
I can't for the life of me figure out how to drain the gas tank on my mower. See pics, two lines coming out of the top of the tank. One goes to the fuel pump, the other coming from the mixing chamber (?). This seems like it should be easy but I'm not really sure what I'm looking at here. The gas has been in there over 30 days and I'm getting nervous about leaving it much longer. Any ideas? Siphon it out the tank?

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#3 ·
Siphon it out. Then what's left in their add stabil and run mower for a couple of minutes.
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#7 · (Edited)
I never drained fuel on any of my gear up north. I topped off the fuel to prevent condensation from forming. Lawn gear always fired in spring. Winter gear always fired in fall. Even better is if you can get to your stuff and start it once a month and warm it up. Draining the carb dry can form varnish as there's still a layer of fuel left behind. Sitting in extreme temp changes allows condensation to form in the crankcase. Another argument for starting once a month is keeping critters from making homes and gnawing on wires. On an extended deployment (18 months) we all parked our vehicles in the same lot. Every car started when got back except for a couple with dead batteries. This was 200 cars that sat through summer heat and 2 winters. Nobody did any special prep either.
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#9 ·
I never drained fuel on any of my gear up north. I topped off the fuel to prevent condensation from forming. Lawn gear always fired in spring. Winter gear always fired in fall. Even better is if you can get to your stuff and start it once a month and warm it up. Draining the carb dry can form varnish as there's still a layer of fuel left behind. Sitting in extreme temp changes allows condensation to form in the crankcase. Another argument for starting once a month is keeping critters from making homes and gnawing on wires. On an extended deployment (18 months) we all parked our vehicles in the same lot. Every car started when got back except for a couple with dead batteries. This was 200 cars that sat through summer heat and 2 winters. Nobody did any special prep either.
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Good info. About cars, the engine can usually take it while small engines aren't as robust.

Let me tell you of an experiment I recently did. I had an Echo trimmer that I've put hundreds of hours on it and it didn't want to die. I was tired of using it but couldn't get myself to put in the garbage. I tend to use my equipment until it dies of a natural death.

So 4 years ago I mixed a large amount of fuel with 2-cycle engine oil and also added Marine Stabil. My goal was to try to kill this trimmer. I put an end to my experiment this past summer, I was using gasoline that was 3 1/2 years old and the trimmer was still going strong. So I got rid of what was left of the fuel and kept on using the same trimmer.

I am not recommending anyone to do the same. I'm only sharing my attempt at destroying a trimmer and my surprise that 4 year old fuel was still working.