Part Details:
Brass Gear
Nylon Hub
47 Tooth for 3.1:1 gear ratio paired with the 13-185 pinion gear with 15 teeth
DEISIGN CHANGE BY PENN TO MAIN/PINION GEARS
REDUCED GEAR RATIO FROM 3.5:1 TO 3.1:1 IN 1999
1998 Ratio = 3.5:1
5-185 had 56 teeth (Brass)
13-185 had 16 teeth (Brass)
1999 onwards Ratio = 3.1:1
5-185 has 47 teeth
13-185 has 15 teeth (changed from brass to SS)
The pitch of the main gear teeth are angled differently as well.
Count your gear teeth before ordering!
You'd need both of the current gears for a matching gear set.