Waterman Lill Bertha/Nostalgia Fuel Pump Gear & Spacer Set

Please specify gear width for proper gallonage for your application. If you need help on deciding the gear width RBS will guide you.

Waterman Nostalgia and Lil Bertha gear sets are priced the same so racer must specify which fuel pump the gears are for when ordering.

Here is a breakdown on Waterman Little Bertha gear sets. They start at 13 gallon and can up to 32 gallon. Gears with wear plate will measure 1.700" overall width. With each .050" increase in gear width the racer will gain a gallon of fuel. Example below:

.700" 16 gallon

.750" 17 gallon

.800" 18 gallon

.850" 19 gallon

Nostalgia gear sets are good for 10 gallon to 22 gallon fuel pumps and gear sets do not interchange between the different versions of Waterman fuel pumps. Gears with wear plate will measure 1.200" overall width. With each .050" increase in gear width the racer will gain roughly gallon of fuel. Example below:

.600" 13.85 gallon

.650" 15.00 gallon

.700" 16.50 gallon

.750" 17.25 gallon

.800" 18.50 gallon

.850" 19.50 gallon

.900" 20.50 gallon

.950" 21.75 gallon

1.00" 23.00 gallon

1.10" 24.95 gallon

1.20" 26.75 gallon

1.30" 29.00 gallon

1.40" 31.25 gallon

1.50" 33.50 gallon