Reply To: vibration and noise in gearcase

[Bob Wight]

As Frank noted, I found this same issue the first time I did a gearcase reseal job when I was putting downward pressure on the driveshaft.  Trying doing a quick reassembly of your gearcase without any sealant, then turn the driveshaft by hand.  If you push down on the driveshaft as you turn it you’ll hear a lot of noise.  Lift up slightly on the driveshaft as you turn it and you’ll see the noise goes away.   Perhaps another thing to check while you’ve got it apart is a missing thrust washer on one of the drive gears which would prevent proper meshing of the gear set.   The original gear set on the FD-19 should have 21 teeth on the forward and reverse gears.

Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1957 Evinrude 3022
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20
1982 Evinrude 25hp

“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."