400-800 stern drive upper gear-case. That is ball gear drive units for years 1971 to 1985.
components are: P/N 11410 stainless steel water pump shaft. Stripped male spline from fast starts and
lower unit propeller impact. P/N 11412 harden steel drive shaft with groves worn in seal area. (stripped female
spline from rust) Rebuilt upper gearcase case assembly with GLM aftermarket OMC parts with new gears, drive shaft,
water pump shaft, housing, bearings, ball gear, seals and water pump housing.
800 series high profile drawing
OMC Stringer stern drive upper gear case for years 1968 to 1977 with both press on and bolt on ball gears.
Case may come with or with out true coarse steering installed.
Used parts may be available please contact order
desk for availability
Need a rebuilt upper gearcase click here
for pricing details on our remanufactured units. Rebuilt upper gearcase case assembly parts with new gears, drive shaft,
water pump shaft, housing, bearings, ball bear, seals and water pump housing with total parts value of
400 Series OMC stern drive lower gear case exploded view drawing for years 1982 to 1986 with 3-1/4 inch smaller hub.
Drawing includes the following parts: Drive shaft, gearcase, propeller shaft, drive shaft, bearing carriers
and bearing retainers.
OMC stern drive years 1982 thru 1986. Lower unit components drawings are divided into 3 section.
1st drawing part numbers 1 to 22, second drawing part numbers 23 to 48 and third drawing part numbers 49 to 72.|
Layout show GLM Marine P/N, photo and OEM numbers of each component listed in gearcase. Common replacement components
are: Seized bearings from low oil levels or water in the oil. Propeller impact damage resulting in broken gears
and bent propeller shafts. Old cracked seal that are 15 plus years old.
800 lower parts
800 series for the following years: 1982, 1983, 1984, 1985 and 1986 lower unit gear-case. Large hub, drive shaft, drive shaft
bearing, shifter rod and prop shaft installed.
Common replacement components are the same items as 400 series lower unit.
Stern drive is identical except for
housing hub size on 800 series that is 4-1/4 inches, about 1/2 larger than the 400 series.
electric shift 1972 1977
Stringer electric shift lower unit gear-case components for years 1972 to 1977
Electric shift outdrive inspection procedure
Common replacement components are:
Clutch spring and forward gear assembly
from engine idol speeds over 650 rpm.
Broken shifter switch that hold only intermittent contact.
wiring contacts in electrical terminals
Upper drive shaft bearing from low oil levels.
400-800 and electric shift Stringer stern drive intermediate housing.
Common replacement components
are: Drive shaft ball gear due to normal wear or running the boat with stern
drive not all way down in the water. Bearing due to low oil or cracked seals. Drive shaft splines that did not
have updated shafts installed. Clutch packs that have water entering due to cracked seals that are in most cases
20 plus years old.
OMC parts upper gearcase drawing 1986-1992
Cobra with u-joint driven drive shaft for years 1986 to 1992 and (1988 King Cobra) upper gearcase components.
Common replacement components are: Broken gears or seized bearing from improper filling of upper/lower gearcase.
out water pump and yoke area seals on unit with 800 hours or more.
1986 - 1989 3 liter and 1987 - 1990 2.3 liter 4 cylinder with 3-3/4 inch small hub lower gear-case component tech drawing
Common replacement components are: Propeller impact damage resulting
in broken gears and bent propeller shafts. Old cracked seal that are 15 plus
How to repair video series for OMC outdrives show exploded view OMC cobra parts drawing. However we have 25
plus repair videos listed at time of listing. Click on you-tube icon to and select videos to see actual repairs, tools and
Contact the order desk if having problem with your repair as we have a no charge tech service
representative who will help you if required. In most video,s tools and repair parts are listed by GLM part number.
4.250 inch drawing 1985-1995
1986 to 1993 V6, V8 and 1990 to 1993 large hub 4-1/4 inch lower unit 3.0 liter 4 cylinder engine
Common replacement components are:
Propeller impact damage resulting in broken gears and bent
propeller shafts. Old cracked seal that are 15 plus years old. Shifter updates so shifter will moves
with 2-5 foot pounds
1988 to 1993 V6, V8 counter rotating large hub 4-1/4 inch lower unit.
Common replacement components are: First off this drive is not common and can be damage buy using a Cobra bearing carrier puller when changing the seals. Propeller shaft is only 12 inches long and part of the bearing carrier unit. This outdrive should only be service
by a marina that stock the parts to repair it.
King Cobra 1987 to 1989 V8 for 7.4 and 7.5 liter engines with hub size of 5 - 3/4 inch.
note: the true King Cobra lower unit should only be used for the 7.4L (454) and 7.5L (460) motors. For the 5.7L (350)
and 5.8L (351) motors, use the standard OMC Cobra gear-case parts. lower unit Used parts that may not be listed here are the lower gear case, , clutch dog and propeller shafts. gears Please contact order desk for availability.
OMC Cobra outdrive transom parts drawing
Cobra transom mount diagram
Common replacement components are: Shift cable need replacement every
4-5 year unless shifter update has been installed in lower unit, if so then about every 15 years. Broken or
cracked u-joint bellows and exhaust bellows that are 10 plus years old. Gimbal bearings that have not been grease
every 50 hr. or 1 a year.
Cobra-SX Volvo Penta upper gear case layout with both new and used components
Yoke and drive shaft U
joint Socket Bearing Seal kit upper Thrust plate Retaining ring
Manifolds and elbow illustration Ford-Chevy
400 / 800 Series and OMC Cobra manifolds for use with Ford or Chevy engines
OMC engine exhaust failures with
over heating problems can sometimes be traced to the exhaust systems. However before manifold unit or engine is
replaced check the water pump flow to the engine. Test is done by testing the time to fill a 2 gallon container
at idle speed of 550 rpm to 650 rpm.
Volvo Penta SX
Cobra SX Volvo Penta parts layout lower gear-case
Common replacement components are: Bent propeller
shafts form impact damage and cracked seals that are 15 plus years old.
Cobra SX and Volvo Penta transom components
Common replacement components are: Shift cable need
replacement every 7 to 10 years. Broken or cracked u-joint bellows and exhaust bellows that are 10 plus years old. Gimbal bearings that have not been grease every 50 hr. or once a year.
V8 boat engine
Carburetor kits Fuel pumps Fuel filter and water separator Gasket
rebuild kit Thermostat kits Engine manifold gasket set