A special Milemaster Pressure Tank??

[mas]

I recently picked up a 6 gallon Milemaster which is different from all the others I’ve seen. There are some kind of baffles or something inside. Inside the “Baffle” there is a small tag that reads “full” that may have ridden up and down on a shaft. I was thinking it may a doubled for a filler for oil..can someone explain ?

Check out the pics:

Mas

• This topic was modified 5 years, 6 months ago by mas.
• This topic was modified 5 years, 6 months ago by mas.
• This topic was modified 5 years, 6 months ago by mas.

[aquasonic]

I have one of the earlier flat top three piece tanks that has baffles. This tank has rounded shoulders and baffles so I wonder it was one of the earliest of that type produced? Sort of a hybrid.

I can’t figure out the two sealed screws in the bottom though. Maybe pinhole repairs, but the condition of the tank looks good. It’s hard to imagine that’s from the factory. It doesn’t seem like screw holes in the bottom of a fuel tank makes sense. Hopefully someone can shed some light on this.

Improvise-Adapt-Overcome

[mas]

The “baffle” seems to be factory…especially with the metal “full” tag as barely seen through the filler. The two screws on the bottom secure the baffle in place.

It would be cool to see the examples of unusual tanks to compare.

[mas]

OK..I did some more investigating… Inside the baffle (which I think is more of a reservoir now), has a mechanism that opens and closes the opening port. I’m really thinking the reservoir which has a volume of about a quart serves for oil measuring.

So this is what I think were the procedures…with an empty tank:
1. close the port in the reservoir
2. fill with oil until the filled as indicated by the metal tag (which probably had a cork float) has risen to the top of reservoir
3. open the reservoir port
4. fill the tank with gasoline
5. rock tank to mix thoroughly

There must have been some type of handle to open and close the port easily. It’s rather awkward using a hooked rod that I fashioned. Probably frustrating with full oil reservoir ???

Well, this is what I think now….definitely thinking factory and not homemade.

Mas

[David Bartlett]

I’m going to say this is a very neat “Home brew” set-up. No way would they put screws through the bottom from the factory. Very interesting, but you probably won’t find another like it.

David Bartlett
Pine Tree Boating Club Chapter

"I don't fully understand everything I know!"

[billw]

David Bartlett wrote:

I’m going to say this is a very neat “Home brew” set-up. No way would they put screws through the bottom from the factory. Very interesting, but you probably won’t find another like it.

That’s what I was thinking too; but then, aren’t those screws the same type as the ones that hold the top assembly on? If so, it seems like a home-project guy might not go to that trouble…..

Long live American manufacturing!

[mas]

Look closely at the “dimple die” ports and the “full” tag in the third pic. If home-brewed , they guy was a machinist and had access to expensive tooling and presses.

Still think it’s factory.

[mas]

The “shutter ports” are also very well built.

[frankr]

I’m thinking a factory experimental prototype that never went into production. I’ve never seen another like it.

[mas]

… or maybe it was designed as a “reserve?” Keep the port closed to capture about a quart of fuel. If the main part of the tank runs dry, open the port to release the last quart to get you back to the dock???

Seems the shutters on the port may seal very well to support this idea as well.

Mas

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