Full Power Steering Systems

Outboard Hydraulic Cylinders

OUTBOARD SIDEMOUNT CYLINDER KITS

OUTBOARD SIDEMOUNT CYLINDER KITS provide a superior method for steering large outboard engines. We manufacture a solid stainless steel side mount pin which replaces the hollow engine tilt tube. This bar provides a secure mount for our stainless sterndrive cylinder. The clevis joint on the piston rod attaches to a rear plate (sold separately) on the back of the engine. One cylinder is used on single engines and two cylinders on multiple installations. Single engines with RH rotation mount the ram on the starboard side of the engine. All part numbers are for one cylinder and mount assembly.

SIDEMOUNT CYLINDER KIT PART NUMBERS

Integral STD. Clevis Joint Notes
MERC® 2L, 2.5L, 3L NO INTERNAL
KRSM-9000
9" RAM - NO INTERNAL SPACER
MERC PRE '98 2.4L,2.5L
KRSM-9010
9" RAM - INTERNAL SPACER
MERC PRE '98 BIG COWL (INT'L SPACER)
KRSM-9020
9" RAM - INTERNAL SPACER
OMC V6 & V8 '93+
KRSM-9500
10" RAM - NO INTERNAL SPACER
OMC V6 & V8 PRE '93
KRSM-9510
9" RAM - NO INTERNAL SPACER
YAMAHA® V6
KRSM-9600
9" RAM - NO INTERNAL SPACER
SUZUKI® V6
KRSM-9700
9" RAM - NO INTERNAL SPACER

MERC is a registered trademark of the Brunswick Corporation. Yamaha is a registered trademark of Yamaha Motor Corporation. Suzuki is a registered trademark of Suzuki Motor Corporation

OUTBOARD FRONTMOUNT CYLINDER KITS

OUTBOARD FRONTMOUNT CYLINDER KITS provide an excellent alternative to the side mount configuration as rear plates do not need to be attached to the motor. The compact yet rugged design allows maximum turning angles and full independent trimming of multiple motor installations. All hardware is made from polished 316 stainless steel. Front mount rams are available in the standard fixed tube configuration or the fixed rod design, depending on the application – consult your sales specialist

FRONTMOUNT CYLINDER KIT PART NUMBERS

Fixed Tube Front Mount Notes
MERC® 3.0L
KRFM-2000
9" STROKE
MERC/YAMAHA 4 STROKE®
KRFM-2100
9" STROKE
Fixed Tube Front Mount Notes
MERC 225, SINGLE MOTOR
KRFM-2251
7" STROKE
MERC 225, TRIPLE/ QUAD STBD. MOTOR
KRFM-2253
7" STROKE
MERC 225, TRIPLE/ QUAD STBD. MOTOR
KRFM-2254
7" STROKE
MERC 225/250XS CENTER DROP
KRFM-2255
7" STROKE
MERC 225/250XS TRIPLE, DROP STBD. MOTOR
KRFM-2256
7" STROKE
MERC 225 SINGLE MOTOR
KRFM-2258
9" STROKE
MERC 225 TRIPLE/ QUAD STBD. MOTOR
KRFM-2259
9" STROKE
MERC 225 TRIPLE / QUAD PORT MOTOR
KRFM-2260
9" STROKE
MERC 250XS EVEN BRACKETS
KRFM-2500
7" STROKE
MERC 250XS TWIN / PORT MOTOR
KRFM-2501
7" STROKE
MERC 250XS TWIN/TRIPLE STBD.
KRFM-2502
7" STROKE
MERC 250XS TRIPLE CENTER / QUAD PORT
KRFM-2503
7" STROKE
MERC 250XS QUAD STBD.
KRFM-2504
7" STROKE
YAMAHA® 250, 4 CYC. SINGLE, EVEN BRKTS
KRFM-2505
7" STROKE
YAMAHA 250, 4 CYC. OFFSET BRKTS,PORT
KRFM-2506
7" STROKE
YAMAHA 250, 4 CYC. OFFSET BRKTS, STBD.
KRFM-2507
7" STROKE
YAMAHA 250, 4 CYC. OFFSET BRKTS, CEN.
KRFM-2508
7" STROKE
YAMAHA 250, 4 CYC. OFFSET BRKTS, QUAD
KRFM-2509
7" STROKE

MERC is a registered trademark of the Brunswick Corporation. Yamaha and Yamaha 4 Stroke are registered trademarks of Yamaha Motor Corporation.

Outboard Mounting Plates

MANY OUTBOARD APPLICATIONS REQUIRE ATTACHING POINTS for steering and tie bars that are not provided on the stock engines. LATHAM MARINE INC. manufacturers a wide variety of plates from 316 stainless steel to fit most large outboards. Performance boats should use rear plates to attach SIDEMOUNT STEERING RAMS and tie bars because this eliminates the play caused by steering through the tiller arm and engine mounts. Engine powerheads never need to be removed to install LATHAM outboard plates, but cowlings will sometimes have to be modified.

MERCURY® 200 PLATE SYSTEM*

MERCURY® 200 PLATE SYSTEM* provides a secure rear mounting plate without the need for powerhead removal or extensive machine work. The support plate kit is used in conjunction with a rear wing plate for steering, or with a rear tie bar plate for tie bars only. Lower cowling must be trimmed. Engine fasteners included.

* PATENT #4, 964, 354

KPLT-1591

MERC® 200 SUPPORT PLATE KIT ASSY

PLOB-5226

MERC 200 CENTER PLATE ONLY

PLOB-5247

MERC 200 WING PLATE ONLY

MERCURY HIGH PERFORMANCE® 2.5 REAR PLATES

MERCURY HIGH PERFORMANCE® 2.5 REAR PLATES attach with four studs and lock nuts at the rear of the powerhead (Stud kit sold separately). Cowl modifications are not necessary with high performance lift-off cowls. Please note these plates require the high performance exhaust adapters to attach to the engine. Stock engines with high performance exhaust adapters should use these rear plates.

PLOB-7257

MERC® 2.5 WING PLATE - '98 COWL

PLOB-7335

Merc 2.5 Wing Plate Back Bracket - '98 Cowl

KSTD-7257

STUD KIT: MERC 2.5 PLATE - '98 COWL

MERCURY® 3.0 LITRE REAR PLATE KITS

MERCURY® 3.0 LITRE REAR PLATE KITS are designed for Merc’s newest V6. They install easily because no machine work is necessary, but cowlings must be trimmed. Bolts and lock nuts to attach plates to engines are included. Fits Merc 225HP 3.0 liter engines.

KPLT-7196

MERC® 300HP (3.0L) RH WING PLATE ASSY

KPLT-7197

MERC 300HP (3.0L) LH WING PLATE ASSY

KPLT-7198

MERC 300HP (3.0L) CENTER WING PLATE ASSY

KPLT-7199

MERC 300HP (3.0L) TIE BAR PLATE ASSY

KPLT-8317

MERC 3.0L RH WING PLATE ASSY

KPLT-8318

MERC 3.0L LH WING PLATE ASSY

KPLT-8319

MERC 3.0L CENTER PLATE ASSY

KPLT-8320

MERC 3.0L TIE BAR PLATE ASSY

KPLT-7910

MERC 250XS LH WING PLATE ASSY

KPLT-7934

MERC 250XS CENTER PLATE ASSY

KPLT-7909

MERC 250XS RH WING PLATE ASSY

OMC/BRP® REAR PLATE KITS

OMC/BRP® REAR PLATE KITS are designed to fit Johnson® and Evinrude® V-6 and V-8 outboards. The plate kits for the V-8 fit only the old OMC V-8 motors, while the V-6 plate kits fit the new V-6 motors, now manufactured by Bombardier Recreational Products® (BRP). Studs and lock nuts* to attach plates to engines are included. Cowlings must be trimmed.

KPLT-5400

OMC V8 REAR WING PLATE ASSY

KPLT-5410

OMC V8 REAR CENTER PLATE ASSY

KPLT-5450

OMC V6 REAR CENTER PLATE ASSY

KPLT-5460

OMC V6 REAR WING PLATE ASSY

* Specify 5/16″ or 3/8″ powerheads bolts on V-6 engines

YAMAHA® REAR PLATE KITS

YAMAHA® REAR PLATE KITS include studs and lock nuts to attach plates to engines. Cowlings must be trimmed. Plates are not shown but look similar to OMC/BRP® plates.

KPLT-5470

200/225 REAR STEERING WING PLATE

KPLT-5480

200/225 REAR TIE BAR PLATE

KPLT-2829

250 REAR STEERING WING PLATE

KPLT-2828

250 REAR TIE BAR PLATE

SUZUKI® REAR PLATE KITS

SUZUKI® REAR PLATE KITS fit all V-6 engines and include studs and lock nuts to attach plates. Cowlings must be trimmed. Plates are not shown but look similar to OMC plates.

KPLT-5322

V-6 REAR STEERING WING PLATE KIT

KPLT-5323

V-6 REAR TIE BAR PLATE KIT

Mercury, Mercury High Performance, MERC are registered trademarks of the Brunswick Corporation. Yamaha is a registered trademark of Yamaha Motor Corporation. Suzuki is a registered trademark of Suzuki Motor Corporation. Johnson, Evinrude, Bombardier Recreational Products and BRP are registered trademarks of Bombardier, Inc.

Outboard Tie Bars Assemblies

ALL MULTIPLE OUTBOARD INSTALLATIONS

ALL MULTIPLE OUTBOARD INSTALLATIONS require one or more tie bars to keep the motors parallel and equalize loading. Boats running 65 mph or more with multiple outboards should use an external tie bar assembly; either with the LATHAM side mount cylinders and wrap plates or with the LATHAM front mount cylinders. The front mount cylinder and tie bar system will allow the driver greater latitude for independent trimming and tilting without damage to tie bar or motor components. LATHAM MARINE INC. TIE BARS are constructed from 316 stainless steel and satin finished for maximum corrosion resistance. Solid bars are used up to 36″ long. And tubular construction is utilized for longer bars.

SOLID BARS

TBAR-4555

TIE BAR - 7/8" BAR, SMALL CLEVIS JOINTS

TBAR-4560

Tie Bar - 1-1/8" Bar, Standard Clevis Joints

TBAR-4570

TIE BAR - 1-1/8" BAR, MEDIUM CLEVIS JOINTS

TBAR-4490

TIE BAR - 1-1/4" BAR, LARGE CLEVIS JOINTS

TUBULAR BARS

TBAR-4730

TIE BAR - 1-3/8" TUBE BAR, MEDIUM CLEVIS JOINTS

TBAR-4770

TIE BAR - 1-5/8" TUBE BAR, MEDIUM CLEVIS JOINTS

TBAR-4780

TIE BAR - 1-5/8" TUBE BAR, LARGE CLEVIS JOINTS

CLEVIS JOINTS

CLVS-1070

SMALL CLEVIS JOINT ASSEMBLY, 5/8"-18 MALE THD

CLVS-1075

STANDARD CLEVIS JOINT ASSY, 3/4"-16 MALE THD.

CLVS-1077

MEDIUM CLEVIS JOINT ASSY, 3/4"-16 MALE THD.

CLVS-1079

LARGE CLEVIS JOINT ASSY, 7/8"-14 MALE THD.

CLVS-4997

SMALL CLEVIS SCISSOR JOINT ASSEMBLY

CLVS-4999

MEDIUM CLEVIS SCISSOR JOINT ASSEMBLY

CLVS-5000

MEDIUM CLEVIS SCISSOR JOINT ASSEMBLY

ROD ENDS

STANDARD SERIES

RDEN-6010

AHFT3 10-32 FEMALE RH 303

RDEN-6011

AHMT6 3/8-24 MALE RH 303

RDEN-6021

AHMT8 1/2-20 MALE RH 316

RDEN-6022

AHMTL8 1/2-20 MALE LH 316

RDEN-6015

AHMT10 5/8-18 MALE RH 303

RDEN-6016

AHMTL10 5 / 8-18 MALE LH 303

RDEN-6026

AHFT10 5/8-18 FEMALE RH 316

RDEN-6018

AHMT12 3/4-16 MALE RH 303

RDEN-6019

AHMTL12 3/4-16 MALE LH 303

RDEN-6020

AHFT12 3/4-16 FEMALE RH 303

ART SERIES - HEAVY DUTY

RDEN-6030

ART6-ECR 3/8-24 MALE RH 17-4PH

RDEN-6008

ART8-ECR 1/2-20 MALE RH 316

RDEN-6033

ART10-ECR 5/8-18 MALE RH 17-4PH

RDEN-8416

ARTL10-ECR 5/8-18 MALE LH 17-4PH

RDEN-6032

ART10CR 5/8-18 FEMALE RH 17-4PH

RDEN-6034

ART12-ECR 3/4-16 MALE RH 17-4PH

RDEN-6037

ARTL12-ECR 3/4-16 MALE LH 17-4PH

PLEASE NOTE: Jam nuts sold separately.

Outboard Bolt Kits

ATTACHING HARDWARE

ATTACHING HARWARE – All steering rams and tie bars require special bolts and spacers to attach them to plates or mounts. Clevis joints require stepped bolts with the exact length to prevent damage to the clevis bushings.

KBLT-1036

BOLT KIT: 5/8" X 3" - RAM TO LINK

KBLT-2763

BOLT KIT: STANDARD CLEVIS TO 3/8" PLATE

KBLT-2764

BOLT KIT: MEDIUM/LARGE CLEVIS TO PLATE

KBLT-6010

BOLT KIT: 5/8" X 2-1/2" - FOR 5/8" ROD END TO PLATE

KBLT-6020

BOLT KIT: 3/4" X 2-3/4" - FOR 3/4" ROD END TO PLATE

KBLT-6090

BOLT KIT: 5/8" X 3-1/2" - FOR 5/8" ROD END TO PLATE

KBLT-6250

BOLT KIT: 5/8" X 2-3/4" - FOR 5/8" ROD END TO PLATE

KBLT-7428

BOLT KIT: STD. CLEVIS - OMC, YAMAHA, SUZUKI

KBLT-7867

BOLT KIT: RAM TO LINK

KBLT-8502

BOLT KIT: MEDIUM CLEVIS TO WING PLATE

KSTD-1640

STUD KIT: SMALL CLEVIS JOINT ASSY - 7/16"-20

Outboard Full Power Hardware

LATHAM OUTBOARD FULL POWER STEERING is regarded as the superior full power outboard steering system in the industry. With the high efficiency ‘on-demand’ design to minimize current draw and battery drainage, drivers can steer their boats fitted with singles, twins, triples and even quad outboard motor with a single finger. Listed below are the main components and hardware required to convert your LATHAM Outboard Self Contained Steering System to Full Power.

ELECTRIC POWER STEERING PUMPS

ELECTRIC POWER STEERING PUMPS are required to provide outboard steering systems with full power as power steering pumps are not supplied with outboard motors. The LATHAM ELECTRIC POWER STEERING PUMP KIT is designed with the pump, reservoir tank, accumulator and pressure filter integrated into a single unit. This allows for an easy installation and with the appropriate helm, hose and fittings, self-contained systems can be converted without major system modifications. This system uses the same motor mounted cylinders and attaching hardware.

KPMP-7832

PUMP KIT: ELECTRIC POWER STEERING

OUTBOARD FULL POWER HELMS

OUTBOARD FULL POWER HELMS are specifically matched with the LATHAM ELECTRIC POWER STEERING PUMP KIT and are available in sizes ranging from 2 to 7 cubic inches per revolution. Like the sterndrive helms, these units are also supplied with integral shock and pressure relief valves to protect the system from overpressure and pressure spikes. THESE HELMS CANNOT BE INTERCHANGED WITH THE STERNDRIVE FULL POWER HELMS. These helms can use the standard stainless steel columns but require a special helm fittings kit which is listed below.

HELM-1712

LMD-2C FULL POWER HELM, OUTBOARD

HELM-1713

LMD-4C FULL POWER HELM, OUTBOARD

HELM-1711

LMD-6C FULL POWER HELM, OUTBOARD

HELM-1714

LMD-7C FULL POWER HELM, OUTBOARD

COLM-7935

3" TILT COLUMN ASSEMBLY, STAINLESS

COLM-3830

3" STANDARD COLUMN

COLM-3840

6" STEERING

COLM-7936

6" TILT COLUMN ASSEMBLY, STAINLESS

COLM-8577

AHMTL12 3/4-16 MALE LH 303

KFIT-7833

ELECTRIC FULL POWER HELM FITTINGS & TRIM KIT

Steering Wheels

TRIM WHEELS BY LATHAM put the world of performance steering technology at your fingertips! Now you don’t have to remove your hand from the wheel to operate the power trim. Three water resistance switches operate your power trim pumps, bringing your drives up and down together, while your stock trim panel operates the drives independently. Sealed dash housing eliminates dangling cords and wires. TRIM WHEELS are now available for LATHAM full hydraulic systems and most other hydraulic and cable systems. Please specify number of drives.

COMPETITION STEERING WHEELS

COMPETITION STEERING WHEELS have a durable foam grip over stainless steel rim and spokes for zero compass deflection and corrosion resistance. This wheel has been the standard of offshore racing for years.

STWL-1571

13" DIAMETER S.S. DEEP DISH WHEEL

STWL-3180

13" DIAMETER S.S. STD. DISH WHEEL, BLACK FOAM

STWL-3181

13" DIAMETER S.S. STD. DISH WHEEL, WHITE FOAM

STWL-3179

14.5" Diameter S.S. Std. Dish Wheel, Black Foam

STWL-3178

14.5" Diameter S.S. Std. Dish Wheel, White Foam

KSTW-1574

STEERING WHEEL KIT:14-1/2" S.S. Wheel,Cover Kit & HUB ADAPTER

LATHAM TRIM WHEELS

LATHAM TRIM WHEELS were designed for marine use with stainless steel spokes and rim. All three spokes are equidistant to make Trim Wheel switches easy to reach. Grip is made of durable black or white foam. These wheels are supplied with Latham Trim Columns specially designed to work with Latham Trim Wheels.

KSTW-7231

14.5" DIAM. S.S. TRIM WHEEL, BLACK, 3" COLUMN

KSTW-7236

14.5" DIAM. S.S. TRIM WHEEL, BLACK, 6" COLUMN

KSTW-7241

14.5" DIAM. S.S. TRIM WHEEL, WHITE, 3" COLUMN

KSTW-7246

14.5" DIAM. S.S. TRIM WHEEL, WHITE, 6" COLUMN

KSTW-8364

CAPILANO TRIM WHEEL - SS SPOKE

HUB ADAPTERS

HUB ADAPTERS are required to connect steering wheels to different styles of helms and columns, and cover kits conceal the nuts and bolts.

STWL-3860

HUB ADAPTER TO 3/4" TAPERED STANDARD SHAFT

STWL-3870

HUB ADAPTER TO MERC CABLE HELM

STWL-3810

HUB ADAPTER TO 3/4" TAPERED STANDARD SHAFT

STWL-3850

HUB COVER, LATHAM WHEELS

STWL-3800

STAINLESS STEEL COVER KIT

STWL-7007

HUB ADAPTER PUSH BUTTON QUICK RELEASE, STD

STWL-7015

HUB ADAPTER PUSH BUTTON QUICK RELEASE, 9 BOLT

Autopilot Valves

LATHAM MARINE’S AUTOPILOT VALVES will keep your fine motorcraft on course with the same precision and reliability as your LATHAM primary steering system. Our hydraulic Autopilot Valves interface with most popular electronic autopilots and are exclusively designed to operate with LATHAM FULL POWER STEERING SYSTEMS. We designed these valves from the ground up with all the necessary features, so there are no bulky extra blocks to add on. Simply connect your hydraulic hoses and autopilot electrical signal lines, and you will be cruising in style!
 

AUTOPILOT VALVES

AUTOPILOT VALVES are available for both sterndrive and outboard full power steering systems. These valves offer smooth responsiveness, with autopilot speed adjustment. The steering rams are locked when the autopilot valve is idle. They are equipped with a protective anodized billet aluminum body and are available in 12 or 24 VDC.

VALV-7275

AUTOPILOT VALVE, STERNDRIVE FULL POWER

VALV-7285

AUTOPILOT VALVE, OUTBOARD FULL POWER