OMC Parts / OMC Cobra Stern Drive Tech Drawings

OMC Parts Tech Support 400 800 Series

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Aftermarket OMC Stern Drive Tech Support for 400 / 800 Stringer Series OMC Parts

  • GLM aftermarket replacement gears for OMC sterndrives years 1969 thru 1985. Please Note that years 1969 thru 1972 will require changing the ball gear to the newer type with nut, as older outdrive will have press on ball gears installed on them.
Aftermarket omc parts, gear sets with tech support
22510-21-16-gear-set-bearings.jpg
Click here for # 22510 for 21-16 Gears please use # 22512 for 21-17 Gears

# 22510 21/16 Upper gear case $969.29
OEM # 982261

  • 21-19 gear ratio can be changed to 21-20 single engine OMC boats with original gear set of 21/16 that are 24 feet long or with original motor should go with 21-17 gear ratio to make up for compression loss, and weight.
  • 30 Minute free tech help service comes with any OMC upper gear case gear sets sold. Purchaser needing help with shimming or any stern drive related problems please phone 4pm to 7 pm west coast USA time.
  • We have Tech service illustrations with exploded drawings for the do-it-yourself mechanics new to OMC boat repairs. See 800 / 400 Stringer series upper gearcase drawings and layouts to find OMC parts needed for your sterndrive repair.

OMC parts drawings Click Here
22590 17 omc gears bearing retainer
# 22590-17 Aftermarket parts bearing retainer assemble

  • The following are a list of OMC stern drive parts that you may require to repair OMC outdrive units. They are as follows.
  • Seal kit # 87650 years 1973 thru 1986 
  • Seal kit # 87651 years 1968 thru 1972
  • Plastic shim kit # 23310
  • Shim kit # 23510 (stainless steel) for driven gear 
  • Shim kit # 23320 (stainless steel) for small timken bearing located at rear of OMC stern drive case
  • Loctite aviation gasket sealant # 30517, 680 or 609 Loctite for outside of seals and inside gear shaft to ball gear area
T.C.Electronic / Marine Tech support service number (416) 751-7326