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Old 21-03-2009, 16:30   #1
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Help deciphering prop marking

The only markings I've been able to find are on the rear face of the hub. It looks like " HH44897" which makes no sense. I know it's right handed so perhaps the first two letters are "RH" for right hand. It is a three blade prop approximately 12 1/2" wide. Any Einstein's out there?
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Old 21-03-2009, 19:58   #2
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RH44897....This "Einstein" thinks the last 3 digits are month and year

I would take it to a local prop shop

Many times when a wheel is worked on, they stamp it. The 44897 could be a job #
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Old 22-03-2009, 04:05   #3
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Most manufacturers mark the propeller with prop diameter, pitch and shaft diameter. Often the letter R or L for right or left hand will appear in the marking.
A three blade prop approximately 12 1/2" wide, appearing to be marked “HH44897", might be designating:
“HH” = RH = Right Hand
“44" = 44 eighths Pitch5.5" (11" Pitch)
“89" = 11.125 eighths Diameter (11-1/8" Dia)
“7" = 7 eighths (7/8" Shaft Diameter)
Alternatively, because the number doesn’t seem to make exact comparison to your observed measurement, it could be just a (non descriptive) part/job number.
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