06-24-2018, 05:06 PM
You will really need to measure the tanks to determine the actual capacity. I have seen 1986-1987 Newells that claimed a total fuel capacity of 306 gallons, 300 gallons, 200 gallons and 292 gallons.
On my 1992 with twin fuel tanks measure
Main Tank: 26-1/4" H, 23" W and 93" deep external measurement for 243 gallons
Aux/Generator Tank: 27" H, 12" W and 61" deep external measurement for 85 gallons
Calculation (measurements in inches) is (HxWxD) x 0.004329 gallons per cubic inch = gallons
Technically each dimension should be reduced by 1/4" assuming 1/8" steel used to construct the tank. On the Newell floorplan, they show 243 and 85 gallons for those dimensions.
On my 1992 with twin fuel tanks measure
Main Tank: 26-1/4" H, 23" W and 93" deep external measurement for 243 gallons
Aux/Generator Tank: 27" H, 12" W and 61" deep external measurement for 85 gallons
Calculation (measurements in inches) is (HxWxD) x 0.004329 gallons per cubic inch = gallons
Technically each dimension should be reduced by 1/4" assuming 1/8" steel used to construct the tank. On the Newell floorplan, they show 243 and 85 gallons for those dimensions.