how to test low pressure lift pump

[GulfCoast56]

1999 DX50TLRX
It has 2 pumps How exactly can these be tested
Thanks Mike

[pstephens46]

Don't see that model number in the list on this site....

[99yam40]

probably missed a 1
150 not a 50

[GulfCoast56]

yes a 150 HP DX150TLRX
LP fuel pump Part #6E5-24410-10-00
Test procedure is appreciated

[pstephens46]

Will the motor start and idle at all? It it will, you could dump the gas out of the clear filter bowl on the engine. Those pumps should fill it back up pretty quickly after starting.

There is a pressure/vacuum test. Maybe Boscoe has the specs. I do not.....

[fairdeal]

I think the test and spec are the same for mechanical diaphragm pumps, whether 2 stroke or 4 -

applying pressure to the suction side - with finger over outlet pipe- should hold 7 psi without leakage

applying pressure to the discharge side - suction side open - same

applying suction, to the suction side - outlet side open - should hold -4 psi without leaking

[GulfCoast56]

Thanks for your info
I changed out both this morning and solved everything

[pstephens46]

I believe these pumps can be rebuilt. Don't toss the old ones in the trash yet....