Figure 5-6.2. Start-Derich and Start-Accel
Do not use start/accleration adjustment to cor-
rect normal maintenance items such as misrig-
ging, air leaks, fuel leaks, faulty fuel nozzle,
ignition problems, starter-generator systems
problems, etc. Do not use the start acceleration
adjustment exclusively to improve engine start-
ing. Excessive clockwise settings before en-
countering over-temperature results in a single
high peak TOT over a wide speed range for a
large part of the starting time. Use start-derich
adjustment with start/acceleration adjustment
to optimize engine darting.
To accuratelydetermine proper adjustment, conditions
under which the adjustments are made should be consis-
tent, i.e., a fully charged aircraft battery, the same
residual TOT and the same lightoff speed.
A required adjustment of more than two clicks clockwise
is an indication that the fuel control is not the cause of
1 F o r l o w l i g h t o f f t e m p e r a t u r e o
slow/hung starts, turn the adjuster clockwise.
Make adjustment in changes of one detent (click)
at a time.
There are eight positions for the adjuster (the neutral po-
sition is three clicks from the counterclockwise stop). De-
tent grooves hold the adjuster in the selected one of these
positions without the need of a jam nut.