Bleeding fuel system after filter change

J

Justin_bat

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May 9, 2025
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just did a fuel filter change on my A93 and figured I'd check in here, what's your go to process for bleeding the system afterward? I followed the manual, cracked the bleed screw, pumped the primer until fuel came out steady, but she was still a bit stubborn on startup. need help to make the bleed process smoother on the A series? dunno if I'm missing something simple or if there's a better technique some of you use.
Cheers
 
Justin_bat said:
just did a fuel filter change on my A93 and figured I'd check in here, what's your go to process for bleeding the system afterward? I followed the manual, cracked the bleed screw, pumped the primer until fuel came out steady, but she was still a bit stubborn on startup. need help to make the bleed process smoother on the A series? dunno if I'm missing something simple or if there's a better technique some of you use.
Cheers
Click to expand...
Looks like you did the basics right but sometimes those A93s can be a little persnickety about air pockets. After you get that steady stream from the bleed screw, try cracking open the injector lines at the injectors themselves one at a time while cranking the engine until fuel spits out, that usually chases out any leftover air hiding in the lines. My neighbor had a similar issue with his tractor and that trick finally got it purring.
 
HardcoreSteven said:
Looks like you did the basics right but sometimes those A93s can be a little persnickety about air pockets. After you get that steady stream from the bleed screw, try cracking open the injector lines at the injectors themselves one at a time while cranking the engine until fuel spits out, that usually chases out any leftover air hiding in the lines. My neighbor had a similar issue with his tractor and that trick finally got it purring.
Click to expand...
One thing I have to mention when it comes to cranking any kind of engine, make sure your battery is in good health. Long story short, I learned this the hard way many years ago and I ended up getting a new battery. I needed one anyway, but I didn't had to do it that day.
 
If you're trying to bleed the system, here's a little tip from experience: Start at the filter and then move toward the injectors. Some of the A93s can trap air in tricky spots, so just be patient and give it a bit of extra time. Before you crank it up, leave the key on for about 30 seconds to let the lift pump do its thing. And instead of cranking it for a long stretch, try a few shorter bursts. It's usually way more effective
 

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