IMCO SCX Series Guía de instalación

IMCO SCX SERIES INFORMATION, OPERATION & MAINTENANCE

1. SCX & SCX4 Drives will not fit on a standard gimbal helmet, IMCO HELMET:

#05-8025 Black or #05-8027 Silver or #05-8028 ITS Black is required.

2. Maximum engine idle speed is 800 RPM. Shift drive with a positive move, do not let clutch

sit between neutral and in gear position.

3. Do Not! Install propeller until the drive shift linkage has been properly installed and tested

with the engine running!

4. When using SCX or SCX4 drives it is necessary to have full hydraulic steering for your

safety.

5. When tuning engine, remove propeller and shift drive into forward gear!

6. Do not run your boat with a worn or loose gimbal ring or helmet, worn clevis pins, or clevis bushings.

7. Every hull is different and requires a different setup: Many different things contribute to performance:

water pickup location, cavitation plates, gear ratio, drive height, prop, weight distribution, water conditions,

weather conditions.

8. If you are installing the drive on a new application, consult the manufacture or a dealer with experience

with the hull to determine the proper drive height.

9. SCX Drive is 19 7/8” from crankshaft center line to prop shaft center line (2” shorter than standard

Bravo).

10.The bolt pattern is different from the SCX to the SCX4, lowers cannot be interchanged.

11. Max propeller diameter on the SCX is 16 3/4”, SCX4 is 17” (always check that there is at

least 1/2” clearance between the propeller blades and the drive case).

12.Large diameter propellers installed on a #6 prop shaft will require a torque tab on single engine boats.

13. SCX and SCX 4 drives require a drive oil reservoir with a minimum capacity of 1 1/2 quarts.

14.When installing drive to gimbal or lower to upper always use anti-seize on all threads.

15. When installing lower to upper, inspect all “O” rings, replace as necessary, pressure check to insure

proper seal.

16.If you do your own maintenance and repairs on your IMCO drive, you will need a service manual and

the proper tools. Service manuals and tools are available at www.imcomarine.com/cal_store.

17. Always wear proper safety equipment when operating your boat, testing or running at high speeds.

18. Inspect for: oil level in drive and reservoir, leaks, loose fasteners, worn parts.

Recommended oil: Torco RTF GL-6 Torco Part #A220015CE (unit) Part # S220015C (case) IMCO Part #

09-2600 (unit) Part # 09-2605 (5 Gal.) Part # 09-2610 (case) (100% Synthetic Racing Transmission Fluid)

Replaces SAE 75W90.

Warning!

Danger!

Warning!

Before Running!

To drain oil: remove drain screws form bearing carrier (right below the prop shaft) and on port side of

upper.

To replace oil: pump oil in from lower drain screw until it comes out of upper drain screw hole. Replace

drain screws and add oil to drive oil reservoir.

When changing oil, run the used oil through a strainer to check for metal particles, if there are metal

particles in the oil, it is time for inspection of the gears and bearings. If oil appears milky or off colored

check for leaks.

SCX, SCX4 capacity: 5 qts + reservoir - SCX Upper with SC Lower 4 1/2 qts + reservoir.

19. Drive must be turning before shifting.

20. Do not run engine when drive is trimmed extremely high, or in trailer tow mode.

21.Do not use solvents or chemical cleaner to clean painted surfaces on the drive.

22.When installing or changing propeller use extreme caution, propeller blades can be very

sharp.

22.SCX Upper vertical shaft is 17 tooth spline, SC, Merc lowers are 15 tooth spline. A 17-15 tooth

coupler is available 01-2150 (cannot be used with a spacer).

24. Use extreme caution if modifying lower, case can be weakened or handling can be

adversely.

25.Break in: Do not use full throttle until drive is fully warmed up, do not hold drive at wide open throttle

for more than 2 minutes for the first 3 hours of use.

26. Inspect anode (located on front of cavitation plate) for corrosion or debris; if necessary clean or

replace.

27. Do not shift drive while running on hose with propeller

installed.

28. Rotation: shift linkage pushed in - right hand rotation, shift linkage

pulled out - left hand rotation.

29. Serial # location: Port side below SCX,SCX4 sticker.

Warning!

SCX Upper & SCX Lower

New Break in

5-8 hours

After Break in

20-30 hours

SCX4 Upper & SCX4 Lower New Break in

5-8 hours

After Break in

20-30 hours

SCX Upper & SC Lower

New Break in

5-8 hours

Check Drain Plug Magnet

Every 20 Hours

Cauon!

X SCX4T

XTREME

ADVANTAGE

Parts and Service Manual

IMCO

510 East Arrow Highway

San Dimas, CA 91773

(800) 899-8058 (909) 592-6162 Fax (909) 592-6052

www.imcomarine.com email info@imcomarine.com

TABLE OF CONTENTS

Upper Gear Case - Disassembly …………………………………………………………………………… 1

Upper Case Hardware & Seals (Drawing) …………………………………………………………………….. 2

Upper Case Hardware & Seals (Parts List) …………………………………………………………………….. 3

Upper Case Gear & Components (Drawing) …………………………………………………………….……...4

Upper Case Gear & Components (Parts List) ………………………………………………………………….. 5

Upper Gear Case Assembly ……………………………………………………………………………………….6

Upper Gear Case Assembly Cont. ………………………………………………………………………………. 7

SCXT Setup Diagrams ……………………………………………………………………………………………. 8

SCXT Setup Work Sheet …………………………………………………………………………………….. 9

Backlash Assembly (Diagram) ……………………………………………………………………………………10

Lower Gear Case-Disassembly …………………………………………………………………………….……. 11

Lower Gear Case (Drawing) ………………………………………………………………………………………12

Lower Gear Case (Parts List) ……………………………………………………………………………………..13

Lower Gear Case-Assembly ………………………………………………………………………………………14

Lower Pinion Height Measurements …………………………………………………………………………….. 15

Disassembly-Assembly Tools ……………………………………………………………………………………. 16

Check Oil Before Running

First break in oil change 5-8 hours

Oil is filled to upper drain screw [Fig 1-33]

Pump oil from bottom drain screw [fig 6-36]

Recommended oil change intervals 20-30 hours

Heavy use or high HP change more often.

Serial Number

Date of Purchase

Purchased From

10/16/19 Rev 2

UPPER GEAR CASE-DISASSEMBLY

NOTE; The following instructions assume that the drive has been removed from the transom assembly and

is shifted to the “neutral” position. The lower unit has also been removed, along with the yoke coupler end,

center socket, and cross and bearings. Steps followed by asterisk (**) are required only if inspection indi-

cates component replacement. Brackets following the part name represent the drawing figure # and item #.

1. Remove upper cap screws [1-7,8], remove upper cap [1-3].

2. Remove steering cap screws [1-28], remove steering cap [1-2]

3. Remove pinion hub screws [1-(22,23)].

4. Remove pinion hub assembly [2-(31-45)].

5. Disassemble pinion hub assembly.

6. Remove yoke nut [2-36], and washer [2-37].

7. Remove yoke [2-32].

8. Remove retainer nut [2-31].

9. Remove Yoke gear end shims [2-42], pinion shoulder washer [2-43], and pinion seal carrier [2-45].

10. Remove bearings [2-(38,41)], bearing cups [2-(39,40)], and pinion gear [2-12].

Note; be sure to maintain correct assembly position of the upper & lower thrust bearings & races.

11. Remove upper thrust race [2-6], and upper thrust bearing [2-7].

12. Remove gear assembly [2-(8-13)].

13. Remove lower thrust race [2-6], lower thrust bearing [2-7].

14. Remove oil tank cover [1-41], inspect magnet [1-39].

15. Disassemble gear assy.

Note: Gear on bottom of gear assembly Right Hand Rotation.

Gear on top of gear assembly Left Hand Rotation

Page 2

Upper Case Hardware & Seals

Fig-1

Upper Case Hardware & Seals

Fig-1

Page 3

Item Description Qty Part Number

1Upper Case Black 101-1579

1A Upper Case Silver 101-1580

2See website for steering caps 1n/a

3Upper Cap 101-2555

4Pinion Hub 101-2560

5Screw (5/16-18 x 1/2" Button Head) 108-040705041

6Top Cap Lid 101-2071

7Screw (3/8-16 x 1 3/4" S/S 12 Point) 408-070806111

8Screw (3/8-16 x 1 1/2" S/S 12 Point 408-070806101

9Shift Shaft Plug 111-1024

10 Quad Ring (Cooling Water, Bottom) 111-4024

11 Screw (5/16-18 x 1/2" Allen Set)(Tower Retainer) 108-050705041

12 Quad Ring (Cooling Water, Top) 111-4025

13 "O" Ring (Top Cap) 111-2049

14 "O" Ring (Top Cap Oil Pressure) 111-2013

15 Spring Kit (Seal,Ball & Spring) Kit 01-2045

16 "O" Ring (Water Passage-Upper to Gimbal) 111-2148

17 "O" Ring (Shift Linkage) 111-2129

18 Pinion Hub Shims Kit 01-2548

19 "O" Ring (Pinion Hub) 211-2161

20 "O" Ring (Pinion Retainer Nut) 111-2154

21 Pinion Hub (5/16" Copper Sealing Washers) 10 08-120700004

22 Screw (5/16-18 x 1" Socket Cap) 408-060705082

23 Screw (5/16-18 x 1 1/2" Socket Cap) 608-060705102

24 Screw (3/8-16 x 3/4" HH) 208-010806061

25 Washer (3/8" Star) 208-110800001

26 Washer (3/8" AN) 208-100800001

27 Anode 101-2067

28 Screw (7/16-14 x 1 3/4" S/S 12 Point) 408-070907111

29 "O" Ring (Steering Cap, Oil) 111-2250

30 "O" Ring (Steering Cap, Shift Cavity) 111-2242

31 Detent Kit (Spring & Ball Cylinder) Kit 01-2044

32 Drain Screw Sealing Washer 111-1017

33 Drain Screw 101-2504

34 Guide Pads (Port & Starboard) 201-2471

35 Screw (1/4-20 x 1/2" Flat Head Undercut) 408-020604041

36 Stud (7/16 x 2 1/8") 408-130904741

37 Washer (7/16" AN S/S) 408-100900001

38 Nut (7/16-20 Nylock S/S) 408-080904001

39 Screw (10-24 x 5/8" Socket Cap) 108-060403052

40 Magnet 101-9587

41 Screw (1/4-20x 5/8" Socket Cap) 808-060604051

42 Oil Tank Gasket 111-1030

43 Oil Tank Cover 101-2574

SCX, SCX4, SCXT, SCX4T Upper Seal Kit Kit 11-8008

Upper Case Gear & Components

Fig-2

Page 4

Upper Case Gear & Components

Fig-2

Page 5

Item Description Qty Part Number

1Upper Case Black 101-1579

1A Upper Case Silver 101-1580

2Roller Bearing (Upper Vertical Shaft) 110-3042

3Upper Cap 101-2555

4Pinion Hub 101-2560

5Tower Race 210-6041

6Thrust Race 210-5045-X

7Thrust Bearing (Gear) 210-4044

8Spirol Retainer Ring 201-2055

9Roller Bearing (Internal Gear) 210-3046

10 Gear Replacement 101-4576

11 Gear Spacer 201-9001

12 Upper Vertical Shaft 101-3562

13 SCXT, SCX4T Driven Gear 101-4540

14 Roller Bearing (Upper Vertical Shaft) 110-4020

15 Tower 101-2561

16 Retainer Nut 101-2239

17 Yoke Gear End 101-2085

18 Cross & Bearing 201-2086

19 Center Socket 101-2087

20 Yoke Coupler End 101-2088

21 Nut (Yoke Gear End)(5/8-18 Thin Nylock Steel) 108-091105002

22 Washer (Yoke Gear End) 108-121100002

23 Pinion Gear 101-4538

24 Bearing Cone (Pinion Bearing) 110-1021

25 Bearing Cup (Pinion Bearing) 110-2022

26 Pinion Hub Shims Kit 01-2548-X

27 Bearing Cup (Pinion Bearing) 110-2024

28 Bearing Cone (Pinion Bearing) 110-1023

29 Yoke Gear End Shims Kit 01-2020-X

30 Pinion Shoulder Washer 101-2241

31 Yoke Gear End Seal 111-3029

32 Pinion Seal Carrier 101-2240

Page 6

UPPER GEAR CASE-ASSEMBLY

NOTE: Optimum performance of the upper gear case requires “setting up” the pinion & clutch gears with IMCO

procedure as follows:

1. Take all measurements using the “SCX4T Setup Diagrams” (Fig 3) and the “SCX4T Work

Sheet” (Fig 4).

2. After all measurements are taken and proper race thickness has been determined, place lower race

[2-6] and thrust bearing [2-7] in case.

3. Place lower right or left driven gear [2-13] with attached tool (backlash tower 01-5598) into case.

4. Adjust rolling preload (8-10 in/lbs) on pinion gear by changing Yoke Gear End Shims [2-28]. Tighten

nut [2-21] to 75 ft/lbs.

5. After proper rolling preload is determined, assemble pinion pack with pinion retainer nut “O” ring [1-

20] between pinion seal carrier [2-31] and retainer nut [2-16].

6. Torque retainer nut to 200 ft/lbs. (Tool: Pinion Retainer Nut Driver 01-5590). (Torque wrench cen-

tered on retainer nut or if using longer tool be sure to compensate on torque value). Use new lock

nut [2-21] and torque to 75 ft/lbs.

7. Install pinion pack using 4 screws [1-23] for testing.

8. Install dial indicator (indicator bracket 01-5588) and pinion gear locking tool (pinion gear lock 01-

5587) Fig-5.

9. Check backlash, adjust backlash with pinion hub shims [2-18] (average backlash should be .007-

.010+).

10. Right Hand: Place driven gear [2-13] on thrust race [2-6] and thrust bearing [2-7]. Install one

gear spacer [2-11] on each side of vertical shaft [2-12], align to engage splines. Install vertical shaft

and gear spacers (coupler spline down) through gear spline. Make sure gear spacers are

engaged! Install gear replacement [2-10]. Install thrust bearing [2-7] and thrust race [2-6].

11. Left Hand: Place driven gear replacement [2-10] on thrust race [2-6] and thrust bearing [2-7]. Install

one gear spacer [2-11] on each side of vertical shaft [2-12], align to engage splines. Install vertical

shaft and gear spacers (coupler spline down) through gear spline. Make sure gear spacers are

engaged! Install driven gear [2-13]. Install thrust bearing [2-7] and thrust race [2-6].

12. Install upper cap [2-3] temporarily using 4 screws [1-8].

13. Check for rolling preload. There should be only a 2-3 in/lbs of rolling preload, no end play.

Warning Note: When checking gear stack rolling, stack should never be larger than case to seat! Check

work sheet measurements! Damage can be caused to bearings or races!

14. Rolling preload can be adjusted by changing race [2-6] on the gear replacement side.

15. Once rolling preload is set, remove upper cap [2-3].

16. Install quad ring [1-10] in case [1-1], install “O” Ring [1-29] and “O” Ring [1-30] in steering cap [1-2].

17. Install steering cap [1-2] using screws [1-28]. Use “Perfect Seal” on threads and torque screws to

35 ft/lbs.

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