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No fuel flow on priming/ fuel leak

Comanche Engines and Propellers

Last Post by Kate 4 years ago

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Kate

Admin

Joined: 5 years ago

Posts: 138

Topic starter 19/04/2020 11:31 am

July 18, 2018 at 05:16 #104564 Trash | Reply

Frank Flores

Participant

I have a 69 260c since we’ve owned it before start when priming I never see the fuel flow move. The elect pump is working but am needing to prime nearly 8-10 Sec to start. After start and on t/o fuel flow works normally threw out flight. Issue #2 after shut down the small fuel drain line just aft the firewall on rt side leaks for more than the normal minute or so. Leaks about a drip every 2 sec. plane shuts down normally on shut down. I’m thinking fuel control shutoff has leak in it.
Thanks frank
October 11, 2018 at 02:34 #104943 Trash | Reply

Richard Tice

Participant

Frank,
Did you ever get this figured out?

I’ve got a similar problem where the boost pump just barely moves the fuel flow off 0.

Thanks,
Ritchie
October 21, 2018 at 12:36 #104961 Trash | Reply

Rick Ludwin

Participant

I’ve got a new problem where I get NO flow on priming unless I crack open the connection between the “OUT” side of my electric fuel pump and the fuel line. Already burned up 1 fuel pump. I have a 260. Rick
October 25, 2018 at 16:51 #104973 Trash | Reply

Frank Flores

Participant

Ritchie,

No I haven’t as of yet,but have done further testing by removing fuel line into a bucket to verify fuel flow per min and the fuel flow amount was correct but still no indication on the gauge.

Thanks,
Frank
February 21, 2019 at 18:00 #105627 Trash | Reply

William Hughes

Participant

Frank:

That is likely because there would be no fuel flow. The pump is making pressure but the flow due to priming is very small. Most fuel flow meters won’t register very low flows. If you are having hard starting and suspect priming have your priming lines cleaned. These can gum up where they inlet into the cylinder and strongly resist flow. The priming stroke ends up all gong into one or two cylinders and then there isn’t much working for you at that point.

William

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