Partialling fueling 148 gallon tanks in later models

[JimC]

Ernie,

I was wondering if that would work, but I guessed that with the daisy chain of tanks that you'd have to be closer to 60 gallons/tank to see any fuel in the last outboard tank of a 148-gallon 337. It's nice to know that it's a relatively small amount. Do you have the 74 gallons-a-side tanks, or do you have the smaller tanks?

How critical is the level ground fore and aft? I'm fairly certain I can reliably park the plane so it's level side to side. My refueling site at my home base isn't level - it's very close, but I can tell you the plane comes out of the hangar a lot easier than it goes in.

Jim

[Ernie Martin]

My 1973 337G has extended-range tanks but of the 128-gallon variety. However, it's likely that the 148-gallon version has all or most of the added capacity outboard of the fill hole, in which case you're likely to find that the "just-see" amount is around 30 gallons.

If it looks level, it's good enough. Also, if you use a carpenter's level (with a bubble), there should be some park angle where the two main wheels are level. Perhaps more important is that both wings have similar amounts when you do the fills to the "just-see" amount. When I return from the island I have used about 14 of the 30 gallons I had on the island, so both tanks have about 16 gallons, and that's close enough. A situation where the opposite wing is entirely empty or completely full will, of course, change things.

Ernie

[cessnadriver]

Hello ALL.
I'm wondering has anyone tried (by Form 337) plumbing the AUX fuel tank into the mains on the earlier C337 (prior to Cessna doing it to the newer models)?
Thanks, BILLS