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Aha, that makes sense. BTW, I didn't realize the auxiliary pump bung would fit a female 1/4 NPT connector until I saw your pictures. I thought I needed to find a JIC/AN connector. That makes things much simpler.

Guys, I found this adapter on my unit on the gusset next to the pump. It was covered by a yellow cap (1st picture). Can anyone help me understand what it's for? Is this part of the drum bung adapter? I can't seem to find any other part that goes with it.

Storeman thanks, seeing it is really helpful.

I think you're probably right. I'm going to see what the auxiliary pump can handle just for kicks, but I think I'm going to need a pump on the oil tank too. Are there any dangers in running a second pump in series with the auxiliary pump? I read a post that indicated positive shut off valves...

Thanks for the info Edgephoto. Long outages are on my mind too. If the direct connection gets too complicated, I might opt for something similar to your solution. I was kicking around the Jerry can idea, but decided I'd need to swap them out too frequently in the case of a long outage...

Storeman, I like your idea of using an air hose with quick disconnect as the auxiliary fuel line. Where did you find the parts to fit the bung to the air hose coupler? My set didn't come with a bung adapter, so I'm starting from scratch. Thanks, Kevin

Thanks guys - I'll try these suggestions.

Just picked up a MEP002a - lots of hours but it runs well. I needed to replace a fuel line and found all the information I needed here on the forum. Thanks to all the contributors! I'd like to plumb this to my 330 gallon home heating oil tank. I'm aware of the auxiliary pump, but not sure...