How to test a mechanical fuel pump not in engine?

[totallyconfused]

Hello.

Had some trouble with my van. Thought it was the fuel pump, so bought a new one. Fitted it to van. Now am not so sure the old one had failed.

Have the old one still. Is there a way to test it whilsy not on the engine? If there is and old one o.k. will keep it as a spare. [GRINNING FACE WITH SMILING EYES].

Many thanks.

Sent from my SM-G935F using Tapatalk

[totallyconfused]

Hello.

Had some trouble with my van. Thought it was the fuel pump, so bought a new one. Fitted it to van. Now am not so sure the old one had failed.

Have the old one still. Is there a way to test it whilsy not on the engine? If there is and old one o.k. will keep it as a spare. [GRINNING FACE WITH SMILING EYES].

Many thanks.

Sent from my SM-G935F using Tapatalk

Its from a 1600 Aircooled CT engine. A mechanical, pushrod and diaphragm type pump.

Sent from my SM-G935F using Tapatalk