When the new Bantam company emerged from the American Austin Companies ashes it was necessary to develop a stonger engine...and a different one so as to avoid the Austin licensing royalty. Thus, the noisy Austin roller/ball main bearings were eliminated in favor of the more usual (and less expensive) babbited bearings. Compression was raised to 7.0 to 1 (from the Austin's 5 to 1) which initself gave nearly 50% more power, boosting it up to a heady 19 hp (from 13).

TILLOTSON CARBURETOR MODEL M10 3/4" updraft single bbl.

SET UP

The Tillotson has two adjustments...idling and high speed. All adjustments must be made in the following order:

• 1) Close the high speed or main adjustment screw by turning it to to the right or into its seat (never force against the seat or injury to nozzle will result) then, open one and a half turns.
• 2) close low speed adjustment to its seat then open 1/2 turn.
• 3) open throttle approximately 1/3d of its travel. Choke carb. to start and run until completely warm.
• 4)warmed up and running engine at a good slow speed, close the main adjustment screw until the motor slows down for want of fuel. Back off an 1/8 of a turn or so until the motor gets back on song.
• 5) Close throttle and adjust throttle stop to operate motor at slightly faster than normal idle. Slowly turn low speed adjustment screw in until the motor starts to miss. Then turn in reverse til the engine comes back and runs evenly.
• 6) Adjust throttle stop screw to operate motor at the desired idling speed.

TROUBLE SHOOTING

This is a simple tube type updraft unit. Given that your unit has been rebuilt or is new, there are three things to look for if you are having trouble getting maximum performance and economy (according to service letter B-24).

1. Dirt or water in the carburetor. The smallest particle of dirt will obstruct and prevent proper metering. Look for dirt in the by pass tube if the engine won't idle well, stalls easily, or has irregular or spotty operation. If the engine will not accelerated readilly when warm, back-fires or refuses to perform at high spped, look for dirt in the main nozzle. Water can get in the gas by condensation, so, keep the tank as full as possible. You will have to drain the traps and clean the screen every 30 days.

If you are taking one of tings apart to clean, be careful unscrewing the nozzles or you can destroy the internal threads. USE AIR to clean out metering holes NEVER USE WIRE etc. to pick at them

2. Air leaks in the inlet manifold or manifold gaskets

3. maintainence of proper fuel level.