How should I thoroughly clean out gas tank on push mower?


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Old 05-07-21, 01:56 PM
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How should I thoroughly clean out gas tank on push mower?

Here's the tank and carb on my mower. I ordered a new carb because the tank had quite a bit of debris and there's still remnants in the bottom. What do you recommend?

 
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Old 05-07-21, 02:15 PM
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If the tank is off the mower you can put some gas [or paint thinner] in it, slosh it around and pour it out, repeat as needed.
 
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Old 05-07-21, 02:16 PM
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It's not off the mower but I assume I should probably remove it to clean it thoroughly.
 
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Old 05-07-21, 06:42 PM
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I use an air blower and compressor to blow it all out.
 
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Old 05-07-21, 07:12 PM
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Will probably do that as well once it's removed.
 
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Old 05-08-21, 08:29 AM
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You need to install a new diaphram kit, it is Briggs part # 795083 or old # 495770 also Lowe's has a kit #5083 which has the same parts.
Here we go:

Remove air cleaner, there are 2 bolts that hold things together, one on the front of the tank 3/8" and one into the block 1/2", remove these bolts, now "slowly" slide the carb/tank off the intake tube and breather tube, now tilt the tank in to release the throttle linkage and waalaa the carb/tank is removed. Check the intake tube to see if the “O” ring seal and plastic retainer are still on the intake tube, if so remove them and re-install them into the carb. Remove the 5 screws from the carb/tank remove carb(don't loose the spring) now spray all holes, cracks and crevases in both the carb and tank surface with brake parts cleaner, remove the main screen(looks like a thimble), now with a small screwdriver pry out the main jet(carefully) and clean it, check the “O” ring on the main jet for damage, if it is damaged it must be replaced, reinstall the jet, it can be difficult some times to get it to snap back in place(I use the rounded end of a screwdriver handle). Remove and clean the fuel pickup stem(not necessary if the fuel tank was clean). Clean any junk/rust from the tank. Install the diaphram on the tank then the gasket(no goo or sealer) now carefully replace the carb(the spring will try to misalign the diaphram), tighten all screws a little at a time so as not to crimp the diaphram until they are all tight. Install the carb/tank in reverse order and you are done. If I missed something one of the real mechanics will correct me. Have a good one. Geo
 
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Old 05-08-21, 09:26 AM
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Awesome instructions, thank you brother!
 
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Old 05-08-21, 10:15 AM
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I hate cleaning those small tanks it's such a PIA and they never seem to get clean enough. If it doesn't clean out well you might also consider replacing it with a new one.
 
 

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