Running gas in a Deuce

[coyotegray]

It is interesting to look in the table of fuels for the Deuce MF engine, as shown in TM9-2320-361-10 circa 2006:

Table 15 Permissible Fuels:

FUEL
Primary Fuels​

Diesel Fuel, VV-F-800, grade DF-2
Diesel Fuel, VV-F-800, grade DF-1
Diesel Fuel, VV-F-800, grade DF-A

Alternate I Fuels​

Turbine fuel, MIL-T-5624. grade JP-5
Distillate fuel, MIL-F-24397, ND
Commercial diesel fuel 2-D and no. 2
Diesel fuel MIL-F-16884
Commercial diesel fuel 1-D and no. 1
Turbine fuel, aviation , grade JP-7
Aviation gasoline, MIL-G-5572, AVGAS 80/87
Commercial aviation gasoline grade 80/70
Commercial gasoline, leaded, low lead or
unleaded, when research octane number is 89 or
below, or octane number displayed on retail
gasoline pumps in CONUS is 85 or below
Commercial aviation turbine fuel, jet A
Commercial aviation turbine fuel, jet A-1
Any mixture of primary and/or alternate I
fuels listed above...

The table indicates that the fuels are listed in order of preference.

The part that is interesting to me is both Diesel 1-D and 2-D are listed with AVGAS 80/87, 80/70, Commercial gasoline, leaded, low lead or unleaded 89. And that they say nothing about deleterious effects from using any fuel in the alternate I block.

You would think if the deuce's nuts would come un-twirled on gasoline that they would have put it in the Alternate-II table.

-Chuck

All I can tell you is that when I attended the Navy's Seabee Mechanic A school at Port Hueneme, Ca. in 1990, during the class on Multi-Fuel pumps we were told that running them on a fuel that does not have anything to lubricate the pump, will eventually cause the pump to fail...

Andy..

 

[3d63]

has anybody run on drain oil

 

[stumps]

has anybody run on drain oil

Many people on this group run exclusively on straight drain oil. Some run mixes of gasoline and drain oil.... something like 25% gasoline to 75% drain oil.

Check out the forum on alternative fuels.

-Chuck

 

[stumps]

Gasoline, by itself, is pretty slippery stuff.

Many is the steel gear type electric fuel pump that uses gasoline for all of its lubrication.... very close tolerances too. Add a gallon of motor oil to every 30 to 50 gallons of gasoline, and it is lubricious enough to do all the lubrication necessary in 2 stroke gasoline engines.... far slipperier than diesel on its best day.

I don't see this as a major stumbling block.

If it is a problem, the TM should say so. They spell out all sorts of other problems, sometimes far in excess of their real danger...(see the 2 to 3 warning paragraphs, about cleaning fluids, on every page of the engine rebuilding manual.... easily adds 300 pages to a 400 page manual.)

I haven't researched this enough to say that gasoline is a good thing to use on a sustained basis, just that it puzzles me that if it is so bad, why don't they say so?

-Chuck