Riddle me this fellas:
Oberdorfer 202M7 pump on a Universal M30/5424 diesel.
Engine has sat for at least 5 years, properly winterized on the hard.
I remove old impeller. It's not cracked, but is a bit deformed.
I install a new, seemingly identical impeller. The package even said "Oberdorfer" on it, and referenced the pump models it's compatible with.
With the new impeller, the pump simply cannot pull water from the seacock. I put the old impeller back in, and "bam" pulls water and pumps like a champ. I could blow water up to the pump and the new impeller would pull water for a few seconds, and then stop.
Obviously, running with a 5 year old impeller is not acceptable. I tried lubing the new impeller, but it didn't help. The old impeller is not lubricated and still pumps fine. No, the metal hub is not torn out center of the new impeller. The old and new impellers seem identical in every measurement.
Also- What is the difference between the "N" designation and the older, 202M7 model?
What do you think?
Oberdorfer 202M7 pump on a Universal M30/5424 diesel.
Engine has sat for at least 5 years, properly winterized on the hard.
I remove old impeller. It's not cracked, but is a bit deformed.
I install a new, seemingly identical impeller. The package even said "Oberdorfer" on it, and referenced the pump models it's compatible with.
With the new impeller, the pump simply cannot pull water from the seacock. I put the old impeller back in, and "bam" pulls water and pumps like a champ. I could blow water up to the pump and the new impeller would pull water for a few seconds, and then stop.
Obviously, running with a 5 year old impeller is not acceptable. I tried lubing the new impeller, but it didn't help. The old impeller is not lubricated and still pumps fine. No, the metal hub is not torn out center of the new impeller. The old and new impellers seem identical in every measurement.
Also- What is the difference between the "N" designation and the older, 202M7 model?
What do you think?