Try this in the aircraft.cfg file (wordpad).
Look for the following line usually under the [fltsim.xx] entry:
prop_anim_ratio=1.34
then play around with the numeric value.
You can also fool around within the same aircraft.cfg file with the dynamics under [propellor] section:
eg. it may help if switch on deathering accumulators by turning the 0 to 1 as in:
defeathering_accumulators_available=1 (changed from "0")
also you could try switching on reverser by switching on prop_reverser_available = 1
If you have an older version (FS2000 or earlier) you may not have the following entries in the aircraft.cfg file. So try copying these lines either as a new section or under the [propellor] entry
[propeller]
thrust_scalar=1.0 // Propeller thrust scalar
propeller_type=2 // was 0
propeller_diameter=12.000 // was 5.433000
propeller_blades=4
propeller_moi=20.50000 // was 3.350000
beta_max=29.800000
beta_min=4.000000 // was 17.000000
min_gov_rpm=60.000000 // was 700.000000
prop_tc=0.4 // was 0.004000
gear_reduction_ratio=1.10 // was 1.0
fixed_pitch_beta=0
low_speed_theory_limit=80.000000
prop_sync_available=0
prop_deice_available=0
prop_feathering_available=1
prop_auto_feathering_available=0
min_rpm_for_feather=0
beta_feather=90.0
power_absorbed_cf=0.0
defeathering_accumulators_available=0 // was 1
prop_reverse_available=1 // was 0
minimum_on_ground_beta=2.0 // was 0
minimum_reverse_beta=0.000000
Then can alter any variable and test this in FS9.