For the benefit of you that may be new to gassers. I'd like to offer
you a starting procedure for gasoline engines that's safe and easy.
Timing your Prop for hand-Starting:(see
photo at the bottom of the page)
Gasoline engines that will be hand-proped need to have the prop timed at the 2:00
position at the beginning of compression. That way, your hand will have complete
control of the detonation portion of the compression cycle. It will also produce maximum
starting velocity from your flip. Maximum starting velocity takes place at the 12:00
position, but ignition tales place just before that point. You want the prop well within
top velocity after ignition occurs, in order to provide the easiest, most reliable, and
(1) The aircraft must be restrained by
another person securly holding it, or use good quality starting stand. Never attempt to
start an aircraft by yourself without GOOD RESTRAINT!
(2) Make sure the throttle is in the IDLE
POSITION or a few clicks above!
(3) Use a glove, Chicken-stick, electric
starter. NEVER bare-hand start.
AGAIN: RESTRAINT, IDLE, and GLOVE
COLD ENGINE START:
Set the throttle two or three clicks above lowest idle, close the choke, turn ignition on,
and flip the prop until the engine fires and dies. Open the choke, and flip it until its
running, normally only 2 to 4 flips.
HOT ENGINE START:
Set the throttle two or 3 clicks above lowest idle, open choke, ignition on, and flip the
prop until it fires up. Sometimes you may need to choke the engine slightly. Turn the
ignition OFF, close the choke, flip the prop 2 or 3 times, OPEN the choke, turn ignition
on, and try starting again.
NEVER hand-prop a gas
engine with the throttle set higher than a fast idle! If a gas engine is going to
kick-back, it will be when the engine tries to accellerate off idle and the ignition
begins to advance. If the fuel supply goes lean (for whatever reason) during this
accelleration, it will back-fire violently. This is where you may lose a prop.
Historically, gas engines don't back-fire too often. But they can, and will if you are not
PROP FLIPPING: Get in the habit of letting the prop stop completely before you attempt
to flip the prop again. All too often people reach into a running prop out of habit. Don't
Always let your engine warm up at idle, to get your engine up to operating temperature
before you get throttle happy.
NOTE: I use a welders glove to start my engines. This works very well. You may also use a
chicken-stick if you prefer, but never use a bare hand!